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Competitive influence of the plasmon effect and energy transfer between chromophores and Ag nanoparticles on the fluorescent properties of indopolycarbocyanine dyes J. Lumin. (IF 3.28) Pub Date : 2021-02-25 E. Seliverstova; Ibrayev N; Omarova G; Ishchenko A; Kucherenko M
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Strong self-sensitized green and NIR emission in NaYS2 doped with Pr3+ and Yb3+ by inducing Laporte allowed and charge transfer transitions J. Lumin. (IF 3.28) Pub Date : 2021-02-25 Per-Anders Hansen; Susmit Kumar; Andries Meijerink
Down conversion of solar UV and blue light is one of the few ways of surpassing the Shockley-Queisser limit of solar cells. One of the most efficient down conversion systems is the Pr3+ - Yb3+ lanthanide pair. However, these ions do not provide any strong absorption for solar UV and blue light, thus require sensitizing. In this work, we report self-sensitization by inducing strong Laporte allowed f
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Correlation of luminescence measurements to the structural characterization of Pr3+-doped HfSiOx J. Lumin. (IF 3.28) Pub Date : 2021-02-25 R. Demoulin; L. Khomenkova; C. Labbé; F. Gourbilleau; C. Castro; P. Pareige; E. Talbota
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Bright exciton luminescence from La doped Lu3Al5O12 single crystals J. Lumin. (IF 3.28) Pub Date : 2021-02-25 Karol Bartosiewicz; Takahiko Horiai; Akihiro Yamaji; Akira Yoshikawa; Shunsuke Kurosawa; Kyoung Jin Kim; Vitaliy Vistovskyy; Anatoliy Voloshinovskii; Yuriy Zorenko
This research dealt with the investigation of luminescence properties of undoped and La doped Lu3Al5O12 single crystals using synchrotron radiation excitation. The influence of La3+ doping on the exciton emission and decay kinetics properties of Lu3Al5O12 single crystals was studied at 7 K and room temperature. Undoped and La3+ doped samples showed bright luminescence in the UV spectral range. In undoped
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Luminescence and up-conversion of single crystalline Lu3Al5O12:Pr3+ J. Lumin. (IF 3.28) Pub Date : 2021-02-17 Patrick Pues; Michael Laube; Stefan Fischer; Franziska Schröder; Sebastian Schwung; Daniel Rytz; Torben Fiehler; Ulrich Wittrock; Thomas Jüstel
This work deals with the spectroscopic properties of praseodymium doped single crystalline lutetium aluminum garnet (LuAG:Pr3+). A special focus was set on temperature- and time-dependent spectroscopy. Beyond the well-known down-conversion luminescence of LuAG:Pr3+, also UV-A/B up-conversion luminescence under excitation with a 488 nm laser was thoroughly investigated. Furthermore, the results of the
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Fluorescence of Nd3+ optical centers close to cubic symmetry in a calcium fluoride crystal co-doped with Na+ J. Lumin. (IF 3.28) Pub Date : 2021-02-18 E. Vinogradova; L. Dolgov; V.A. Konyushkin; E.O. Orlovskaya; E.A. Vagapova; A. Treshchalov; V. Peet; V. Hizhnyakov; Yu.V. Orlovskii
Earlier, it was shown by the EPR method that at a very low concentration of the Nd3+ ion in the Nd3+:CaF2 crystal, highly symmetric cubic centers with the Oh symmetry are formed. In the present study, the optical centers of the Nd3+ ion with an anomalously long radiative lifetime τR = 13.6 ms of the 4F3/2(1) crystal-field (CF) level in the Nd3+ (0.05 at.%): Na+ (0.2 at.%): CaF2 single crystal at T = 7 K
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Transparent glass-ceramics based on Co2+-doped γ-GaxAl2−xO3 spinel nanocrystals for passive Q-switching of Er lasers J. Lumin. (IF 3.28) Pub Date : 2021-02-19 Olga Dymshits; Vladimir Vitkin; Irina Alekseeva; Alexander Khubetsov; Marina Tsenter; Anton Polishchuk; Anna Volokitina; Josep Maria Serres; Xavier Mateos; Alexander Zhilin; Pavel Loiko
Transparent glass-ceramics (GCs) based on Co2+-doped γ-GaxAl2−xO3 spinel nanocrystals were developed in the lithium aluminogallosilicate glass system with TiO2 as a nucleating agent. The initial glass contains spinel nanocrystals with sizes less than 3 nm. Secondary heat-treatments in the temperature range of 680–800 °C result in fabrication of transparent GCs based on γ-GaxAl2−xO3 crystals enriched
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UV and X-ray excited red persistent luminescence in Mn2+ doped MgGeO3 material synthesized in air and reducing atmosphere J. Lumin. (IF 3.28) Pub Date : 2021-02-18 Guna Doke; Andris Antuzevics; Guna Krieke; Aija Kalnina; Maris Springis; Anatolijs Sarakovskis
Materials with long persistent luminescence (PersL) have caused widespread interest among scientists and industry for decades. Currently, there is widely available information on the long persistent luminescence materials with emission in the blue and green spectral range, while the number of publications on the afterglow in the red and near-infrared spectral range is considerably lower. In the course
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High-resolution transmission and luminescence spectroscopy of Pr3+:YPO4 J. Lumin. (IF 3.28) Pub Date : 2021-02-24 S.A. Klimin; E.P. Chukalina; K.N. Boldyrev; T.A. Igolkina; M.S. Radionov; M.C. Chou; M.N. Popova
Multifunctional Pr3+:YPO4 single crystals were investigated by high-resolution optical Fourier spectroscopy. The analysis of the transmission and luminescence spectra allowed us to supplement information on crystal-field levels of the Pr3+ ion. Shapes of spectral lines corresponding to transitions from the ground state to the degenerated Γ5 crystal-field levels reveal the hyperfine structure and unambiguously
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Sensitized electroluminescence from erbium doped silicon rich oxynitride light emitting devices J. Lumin. (IF 3.28) Pub Date : 2021-02-24 Lingbo Xu; Hongjing Piao; Zhiyuan Liu; Can Cui; Deren Yang
Erbium doped Si-related compound films, with the 1540 nm emission coinciding with the minimum loss window of optical telecommunication, are regarded as appealing platforms of light sources for silicon photonics. In many previous reports, however, the unipolar carrier injection in silicon oxide/nitride films leads to favorable impact excitation of Er rather than sensitization, requiring high onset voltage
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Hydrothermal Synthesis and Luminescence Properties of Dy3+ Doped SrMoO4 Nano-Phosphor J. Lumin. (IF 3.28) Pub Date : 2021-02-24 A.B. Chavan; M.K. Deore; V.B. Gaikwad; G.H. Jain; A.B. Gawande
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Intensity-tunable terahertz radiation from tin selenide J. Lumin. (IF 3.28) Pub Date : 2021-02-24 Qi Song; Hao Chen; Min Zhang; Jinde Yin; Junbo Yang; Bo Zhang; Peiguang Yan
Recently, the active controlled broadband terahertz(THz) emitter from semiconductor crystal has attracted considerable attention due to its field intensity tuning properties, which makes it a promising candidate for wide applications in THz photonics. A broadband THz wave radiation intensity by applying electric field control in an n-type semiconductor tin selenide (SnSe2) crystal had been reported
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Tumor imaging of a novel Ho3+-based biocompatible NIR fluorescent fluoride nanoparticle J. Lumin. (IF 3.28) Pub Date : 2021-02-24 Q. Fan; G.W. Zhang; B. Peng
Cancer has become the leading cause of death for its high incidence and mortality. Early diagnosis and treatment are essential for the inhibition of tumor growth. In this work, A biocompatible, nontoxic, near-infrared fluorescent tumor targeting nanoparticle KHLF(K5HoLi2F10) was prepared by a delicate method for the early diagnosis of tumor. The surface functionalization of the nanoparticle endows
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Recombination lifetimes of LiF:Mg,Cu,P for pulsed optically stimulated luminescence J. Lumin. (IF 3.28) Pub Date : 2021-01-30 Jacob S. Nyemann; Peter Balling; Eduardo G. Yukihara
The well-known thermoluminescent material LiF:Mg,Cu,P (MCP) was previously shown to emit significant optically stimulated luminescence (OSL). In this paper, we investigate the rate of OSL recombination processes in MCP, expressed as effective lifetimes, using time-correlated single photon counting, in this context often referred to as time-resolved pulsed OSL. The recombination luminescence fell into
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Elaborating the influence of substituent on energy gap and spin-orbit coupling of singlet-triplet excited states of novel organic light-emitting anthraquinone compounds in solution J. Lumin. (IF 3.28) Pub Date : 2021-02-16 Yurong Guo; Zibo Wu; Chao Wang; Yue Liang; Feixiang Ji; Yanan Wang; Haoyue Zhang; Xia Feng; Guangjiu Zhao
In this work, we presented a theoretical investigation of single-triplet excited state transition process by the energy gap (ΔEST) and spin-orbit coupling (SOC) for a series of novel designed anthraquinone compounds in solution. The molecular conformation, steady-state spectra and molecular orbitals were performed by quantum chemistry calculations to investigate the substituent effects on the ΔEST
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Creation of luminescent defects in crystals by coherent pairs of femtosecond laser pulses J. Lumin. (IF 3.28) Pub Date : 2021-02-17 E.F. Martynovich; N.L. Lazareva; S.A. Zilov
The processes of creation of luminescence centers by laser radiation in transparent anisotropic crystals are investigated using MgF2 as an example. To monitor the concentration of the created centers, a luminescent method was developed, which ensured a direct proportionality between the luminescence intensity and the concentration of centers. By the joint action of coherent pairs of femtosecond laser
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Redox-Controlled Fluorescent Sensor for Highly Reactive Oxygen Species Detection and Cell Imaging Based on Dihydrolipoic Acid Functionalized Carbon Quantum Dots J. Lumin. (IF 3.28) Pub Date : 2021-02-23 Ruxia Zhang; Zhefeng Fan
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Temperature-Dependent Luminescence of CaFCl:Yb, Er Upconverting Nanocrystals J. Lumin. (IF 3.28) Pub Date : 2021-02-22 B. Dulani Dhanapala; Hashini N. Munasinghe; Federico A. Rabuffetti
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UV-induced Alteration of Luminescence Chromaticity of Ln-based MOF-76 J. Lumin. (IF 3.28) Pub Date : 2021-02-22 A.V. Mayeuski; D.Yu. Poloneeva; E.A. Toshcheva; A.V. Bardakova; A.V. Shuruhina; A.V. Emeline; D.W. Bahnemann
We demonstrate a new way to manipulate and to control the RGB chromaticity of the luminescence of Ln-based metal-organic frameworks with MOF-76 structure. This new way is based on preliminary UV photostimulation. Particularly, we reveal that besides the conventional ways to control luminescence chromaticity based on alteration of chemical composition and excitation wavelengths, the chromaticity of
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Generation of Q-switched-mode-locked operations in Er-doped fiber laser based on dispersion compensating fiber saturable absorber J. Lumin. (IF 3.28) Pub Date : 2021-02-15 Rui Zhao; Nannan Xu; Xinxin Shang; Lin Zhao; Huanian Zhang; Dengwang Li
In our work, the stable Q-switched-mode-locked (QML) operations were generated in Er-doped fiber laser based on dispersion compensating fiber (DCF) saturable absorber (SA) for the first time. Firstly, the dissipative soliton mode-locked operation was achieved in fiber laser without DCF. After that, the DCFs with different lengths were separately added into fiber laser to gradually optimize the cavity
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The effect of annealing on spectral characteristics of the Ti doped MgAl2O4 crystal J. Lumin. (IF 3.28) Pub Date : 2021-02-16 G.H. Sun; Q.L. Zhang; J.Q. Luo; L.C. Li; Z. Deng; R.G. Zhang
The prepared Ti:MgAl2O4 crystal samples were annealed at different temperature for 24 h in an air atmosphere, and then the transmission spectra, emission spectra, excitation spectra and photoluminescence decay curve were recorded. Furthermore, electron spin resonance of annealed samples were measured at 130 K. It is found that the absorption bands disappeared and the fluorescence intensity increased
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Crystallographic and Judd-Ofelt Parametric investigation into Ca9Bi(VO4)7:Eu3+ nanophosphor for NUV-WLEDs J. Lumin. (IF 3.28) Pub Date : 2021-02-17 Priya Phogat; S.P. Khatkar; R.K. Malik; Jyoti Dalal; Anju Hooda; V.B. Taxak
Judd-Ofelt theoretical approach and Rietveld refinement technique are implemented to gain a profound insight of remarkable structural and optoelectronic aspects of Eu3+-doped Ca9Bi(VO4)7 nanophosphor. The bright red emitting vanadate-based series was developed via an efficient route of solution combustion synthesis (SCS). The Rietveld refinement, been employed upon powder X-ray diffraction (PXRD) patterns
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Effect of calcination temperature on the microstructure and optical properties of monodispersed self-assembled yttrium orthovanadate microspheres J. Lumin. (IF 3.28) Pub Date : 2021-02-18 Huaqian Li; Nianhua Luo; Dan Luo; Linfeng Xiong; Liusai Yang; Minglei Zhao
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A red-emitting fluorescent probe for sensing and imaging biothiols in living cells J. Lumin. (IF 3.28) Pub Date : 2021-02-18 Jingpei Wang; Fan Zhang; Liu Yang; Benhua Wang; Xiangzhi Song
As important members of biothiol species, cysteine (Cys), homocysteine (Hcy) and glutathione (GSH) are involved in numerous physiological activities. Moreover, abnormal levels of these biothiols are closely relevant to a series of diseases. Therefore, it's of great importance and challenges to develop efficient approaches for sensitively detecting biothiols. Herein, a novel fluorescent probe JSC-RSH
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Structure and optical properties of 3-bromo-4-methylthio-2,6-lutidine N-oxide and its eight-coordinate europium(III) and terbium(III) aqua complexes J. Lumin. (IF 3.28) Pub Date : 2021-01-19 P. Godlewska; I. Bryndal; J. Hanuza; R. Lisiecki; J. Janczak; L. Macalik; T. Lis; J. Lorenc; J. Cieplik
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Synthesis, luminescent properties and ab initio study of yellow-emitting Sr8MgGa(PO4)7:Eu2+phosphors for white light-emitting diodes J. Lumin. (IF 3.28) Pub Date : 2021-02-20 Jou-An Chen; Michal Piasecki; Chun-Chuen Yang; Myron Rudysh; Wei-Ren Liu
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Revealing the multicolor mechanism in borotellurite glass phosphor: From individual emission of dual-modes to WLED applications J. Lumin. (IF 3.28) Pub Date : 2021-02-12 J.M. An; D.S. Li; X.Y. He; E.Y.B. Pun; H. Lin
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Sub-nanosecond, high peak power Yb:YAG/Cr4+:YAG/YVO4 passively Q-switched Raman micro-laser operating at 1134 nm J. Lumin. (IF 3.28) Pub Date : 2021-02-04 Xiao-Lei Wang; Xiao-Jie Wang; Jun Dong
We demonstrate a sub-nanosecond, high peak power Yb:YAG/Cr4+:YAG/YVO4 passively Q-switched Raman micro-laser (PQSRML) operating at 1134 nm. The effect of transmission of the output coupler (TOC) and Cr4+:YAG initial transmission (T0) on the Raman laser performance have been investigated. Stable Raman laser pulse trains have been observed for Yb:YAG/Cr4+:YAG/YVO4 PQSRMLs with different combinations
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Energy transfer between two luminescent centers and photoluminescent properties of Ca4-yLa6(AlO4)x(SiO4)6-xO1-x/2: yEu2+apatite structure phosphors J. Lumin. (IF 3.28) Pub Date : 2021-02-19 Haojun Qian; Chenli Fan; Fayaz Hussain; Kaixin Song; Xinjiang Luo; Weitao Su; Huanping Wang; Qingming Huang; Liu Yang
Green-emitting, apatite structure of Ca4-yLa6(AlO4)x(SiO4)6-xO1-x/2: yEu2+ was synthesized by using the high-temperature solid-state method under reducing atmosphere (90%N2-10%H2). Corresponding to the Eu2+ of 4f65d1→4f7 transition at the excitation wavelength of 335 nm, a broadband emission of 450-700 nm showed. Eu2+ lattice selection in Ca4-yLa6(AlO4)x(SiO4)6-xO1-x/2: yEu2+ phosphor were discussed
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Growth and spectroscopy of Tm3+,Ho3+ co-doped LuYO3 single crystal for 2.1μm laser J. Lumin. (IF 3.28) Pub Date : 2021-02-05 Guangzhu Chen; Shanming Li; Yuhang Zhang; Shulong Zhang; Qiannan Fang; Mingzhu He; Min Xu; Min Zhang; Shilie Pan; Yin Hang
A Tm,Ho:LuYO3 crystal was grown using the optical floating zone method. The XRD pattern shows that it belongs to the cubic crystal system (Ia‾3 space group). The absorption cross-section at 796 nm is 3.45 × 10−21 cm2, where the full width at half maximum (FWHM) is 45 nm. The emission cross-section at 2080 nm is approximately 1.33 × 10−20 cm2. The broad fluorescence band extends to 2200 nm where almost
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Trap level spectroscopy of disordered materials using thermoluminescence: An application to aluminosilicate glass J. Lumin. (IF 3.28) Pub Date : 2021-02-05 S.W.S. McKeever; S. Sholom
A method is presented for analyzing complex thermoluminescence (TL) glow curves from disordered materials using aluminosilicate glass as an example. The method is first described using simulated TL glow curves, firstly by assuming a Gaussian distribution of trap depths Et and a fixed frequency factor s, and secondly by assuming distributions of both Et and s. The method is able to reproduce the input
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Luminescence spectroscopy of Cr3+ in an oxide: A strong or weak crystal-field phosphor? J. Lumin. (IF 3.28) Pub Date : 2021-02-10 Sadao Adachi
Various Cr3+-activated oxide phosphors can be classified into two groups: a strong crystal field group [E(2Eg)ZPL < E(4T2g)ZPL] and a weak crystal field group [E(2Eg)ZPL > E(4T2g)ZPL] from an equality relation of the zero-phonon line (ZPL) energies of 2Eg and 4T2g. Obtaining reliable Racah parameters for the 3d3 ion (Cr3+) usually needs accurate information on the three excited-state ZPL energies,
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Laser site-selective spectroscopy of Nd3+-doped Y2SiO5 J. Lumin. (IF 3.28) Pub Date : 2021-02-10 Y. Alizadeh; J.-P.R. Wells; M.F. Reid; A. Ferrier; P. Goldner
We report on laser site-selective spectroscopy, as well as high resolution, infrared to optical absorption, of both the six and seven -fold coordinated, C1 symmetry sites for Nd3+ doped Y2SiO5. A total of fifty three crystal-field energy levels have been determined for both sites. We also present the temperature dependencies of the spectral linewidth and line position as measured in absorption. The
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Nano/micro powders of Nd3+-doped YPO4 and LuPO4 under structural and spectroscopic studies. An abnormal temporal behavior of f-f photoluminescence J. Lumin. (IF 3.28) Pub Date : 2021-02-18 J. Pawłów; K.A. Prokop; M. Guzik; Y. Guyot; G. Boulon; J. Cybińska
We report a detailed analysis of both structural characterization and high-resolution spectroscopic properties of Nd3+-doped YPO4 and LuPO4 in the form of nano/micro powders. LuPO4, like YPO4 crystalizes in a zircon-type tetragonal system. Nd3+ ion in substitution of Lu3+ or Y3+ cations occupies the main symmetry site D2d and the presence of additional components in the spectra may indicate the presence
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Effects of pyridine-like and pyrrolic-like nitrogen on the photoluminescence blue-shift of nitrogen-doped graphene oxide quantum dots J. Lumin. (IF 3.28) Pub Date : 2021-02-17 Junxin Chen; Xiaofen Xu; Yuqiu Ma; Haijun Qin; Jun Liu; Fengzhen Lv; Changming Zhu; Liguang Wang; Lizhen Long; Fuchi Liu; Yong Yang; Wenjie Kong
Materials with tunable photoluminescence (PL) are highly desirable. It can lead to important applications such as photodetectors, bio-imaging, and broadband modulators. In this work, nitrogen-doped graphene oxide quantum dots (NGOQDs) were synthesized by hydrothermal method. The microstructures as well as optical properties of NGOQDs were studied. The as-prepared NGOQDs present tunable PL and exhibit
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Nd3+-doped Bi2SiO5 nanospheres for stable ratiometric optical thermometry in the first biological window J. Lumin. (IF 3.28) Pub Date : 2021-02-09 Dongxun Chen; Yanjie Liang; Shihai Miao; Jianqiang Bi; Kangning Sun
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Theoretical study of the local distortions and the EPR parameters for VO2+ and Cu2+ centers in oxyfluoroborate glasses J. Lumin. (IF 3.28) Pub Date : 2021-02-13 Y.D. Li; B.J. Chen; H.M. Zhang; C.D. Feng
Theoretical calculations of the local structures and the electron paramagnetic resonance (EPR) parameters for the impurities VO2+ and Cu2+ centers in oxyfluoroborate glasses (OFG) were performed by using the perturbation formulas of the EPR parameters for tetragonally compressed octahedral [VO6]8- and tetragonally elongated octahedral [CuO6]10− clusters, respectively. In the calculations, the required
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Femtosecond laser induced luminescence in hierarchically structured NdIII, YbIII, ErIII co-doped upconversion nanoparticles: Light-matter interaction mechanisms from experiments and simulations J. Lumin. (IF 3.28) Pub Date : 2021-02-08 Guilherme H. Oliveira; Flavia S. Ferreira; Guilherme F. Ferbonink; Marcos P. Belançon; Fernando A. Sigoli; René A. Nome
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K2SiF6:Mn4+@K2SiF6 phosphor with remarkable negative thermal quenching and high water resistance for warm white LEDs J. Lumin. (IF 3.28) Pub Date : 2021-02-11 Yuelan Li; Yan Yu; Xue Zhong; Youmiao Liu; Long Chen; Sen Liao; Yingheng Huang; Huaxin Zhang
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Phototransferred thermoluminescence of tanzanite: A matrix-based analysis of time-response profiles and competition effects J. Lumin. (IF 3.28) Pub Date : 2021-02-12 M.L. Chithambo
We report the phototransferred thermoluminescence of tanzanite induced by 470 nm blue light. A glow curve measured after irradiation to 120 Gy and heating at 1 °C s−1 shows three nominal peaks at 86 °C (peak I) and two secondary peaks at 160 °C and 320 °C. The latter two peaks are collocated peaks with each one consisting of multiple components. Phototransferred thermoluminescence is only reproduced
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The 1S0 → 3P1 transition position shift of Bi3+ ion doped Ln2O3 (Ln = Lu, Gd, La) phosphors J. Lumin. (IF 3.28) Pub Date : 2021-02-12 Zehua Zhang; Xin He; Lili Wang; Peng Zhang
A series of Bi3+ ion doped Ln2O3 (Ln = Lu, Gd, La) phosphors have been prepared through a simple urea-based precipitation method. The 1S0 → 3P1 transition position shift of Bi3+ ion has been investigated in Bi3+-doped Ln2O3 phosphors. This is caused by difference of covalency and coordination number. The 1S0 → 3P1 transition of Bi3+ ion in Gd2O3 crystal shifts to lower energy position than that in
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Highly stable CsPbBr3 perovskite quantum dots incorporated in aluminum stearate J. Lumin. (IF 3.28) Pub Date : 2021-02-09 Bowang Shu; Yajing Chang; Li Dong; Leilei Chen; Huijuan Wang; Supeng Yang; Jinhua Zhang; Xiaopeng Cheng; Dabin Yu
CsPbBr3 perovskite quantum dots (PQDs) have drawn much attention for their high photoluminescence quantum yield and great potential in optoelectronic applications. However, they suffer from poor stability under humid condition. This paper reports CsPbBr3 PQDs incorporated in aluminum stearate (AlSt3) matrix via an improved co-precipitation approach, in which AlSt3 not only acted as hydrophobic matrix
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Using multi-site substitution to design blue-exciting phosphor Mg2Y2Al2Si2O12:Mn2+ for full-spectrum plant growth LEDs J. Lumin. (IF 3.28) Pub Date : 2021-02-06 Zhipeng Wang; Panlai Li; JinjinLiu; Yuebin Li; Qi Bao; Xiangyu Meng; Keliang Qiu; Zhiping Yang; Zhijun Wang
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A thermal and pH stable fluorescent coordination polymer for sensing nitro explosives or metal ions with high selectivity and sensitivity in aqueous solution J. Lumin. (IF 3.28) Pub Date : 2021-02-09 Lei Zhang; Jinsong Hu; Jiaxin Li; Jing Zhang
A new zinc(II) coordination polymer (Zn-CP) constructed from 4,4-dipyridyldiphenyl ether (BPDPE) and 1,2-benzenedicarboxylic acid (1,2-bdc), namely [Zn2(1,2-bdc)2(BPDPE)2]n (1), has been discovered using the solvothermal method. Complex 1 is a two-dimensional sheet with uncoordinated pyridine group composed of one-dimensional chain [Zn(1,2-bdc)]n connected by BPDPE, and finally forms a three-dimensional
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The scintillation mechanisms in Ce and Tb doped (GdxY1-x)Al2Ga3O12 quaternary garnet structure crystalline ceramics J. Lumin. (IF 3.28) Pub Date : 2021-01-29 M. Korzhik; A. Borisevich; A. Fedorov; E. Gordienko; P. Karpyuk; V. Dubov; P. Sokolov; A. Mikhlin; G. Dosovitskiy; V. Mechninsky; D. Kozlov; V. Uglov
Scintillation mechanisms and performance parameters of quaternary (Gd,Y)3Al2Ga3O12 compositionally disordered polycrystalline garnet type ceramics doped with Ce or Tb have been investigated for the first time. Similar light yield dependence on a Gd content in the composition was evidenced for both dopants. The highest light yield achieved in Tb doped samples was found to be four times higher than in
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Temperature-dependent luminescent properties of dual-wavelength InGaN LEDs J. Lumin. (IF 3.28) Pub Date : 2021-02-05 D.S. Arteev; A.V. Sakharov; A.E. Nikolaev; W.V. Lundin; A.F. Tsatsulnikov
Temperature-dependent luminescent properties of dual-wavelength blue-cyan light emitting diodes (LEDs) based on InGaN quantum wells were investigated by means of photo- (PL) and electroluminescence (EL) spectroscopy techniques. The results showed that the thickness of the interwell GaN layer had a great impact on the spectra (especially on the EL ones) at room temperature. At low temperatures, however
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Influence of Bi2O3 co-doping on Cr-doped ZnGa2O4 red persistent phosphors synthesized by a liquid phase precursor process J. Lumin. (IF 3.28) Pub Date : 2021-01-30 Seung Hee Choi; Seok Bin Kwon; Bong Kyun Kang; Jung Hyeon Yoo; Young Hyun Song; Dae Ho Yoon
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Atomic-like emissions in UV region from hexagonal boron nitride crystal powders J. Lumin. (IF 3.28) Pub Date : 2021-02-04 N. Maharjan; P. Joshi; R.C. Rai; M.L. Nakarmi
Hexagonal boron nitride (h-BN) crystal powders were characterized for structural and optical properties. Deep UV photoluminescence (PL) spectroscopy was employed for the optical characterization. We studied the effect of annealing on the PL emissions from the h-BN crystal powders. We observed sharp atomic-like PL emission lines in the UV spectral region at 4.10 and 4.12 eV along with their longitudinal
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Effect of carbon nanotube pattern on the laser lift off and quantum efficiencies of near UV vertical LEDs J. Lumin. (IF 3.28) Pub Date : 2021-02-06 M.F. Tian; L.H. Huang; Y. Mei; R.B. Xu; Z.M. Zheng; X.L. Su; H. Long; L.Y. Ying; B.P. Zhang; K. Wang; T.J. Yu
Nowadays, ultraviolet light emitting diodes (UVLEDs) have aroused great interest in past few years for their promising application in adhesive curing, security identification and solid-state lighting etc. In gallium nitride (GaN) based LEDs, the patterned substrates and vertical devices' structure both played pivotal roles in elevating devices' performance. In this work, vertical near-UV-LEDs (405 nm)
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Radiative rate inhibition in fluorescent nanodiamond-microcavity system J. Lumin. (IF 3.28) Pub Date : 2021-02-08 Tulika Agrawal; Shubhayan Bhattacharya; Vijay Kumar Sagar; Prem B. Bisht
Fluorescent nanodiamonds (NDs) are hard, nontoxic, have high melting point and possess physical and chemical stability. In this paper, the NDs with nitrogen vacancy (NV) centres have been studied with steady-state and time-resolved photoluminescence spectroscopy. The broad fluorescence spectrum spans in the visible-near IR region (from 500 nm to 900 nm) with presence of prominent characteristic peaks
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Enhanced performance through trap states passivation in quantum dot light emitting diode J. Lumin. (IF 3.28) Pub Date : 2021-02-04 Mingrui Zhang; Feng Guo; Qingzhong Zhou; Tian Zhong; Biao Xiao; Liyong Zou; Qingliang You; Baogui You; Yang Li; Xueqing Liu; Hongjiao Liu; Jun Yan; Jiyan Liu
Device performance enhancement in quantum dot light-emitting diodes (QLEDs) is realized by adding a small amount of insulating polymer polymethyl methacrylate (PMMA) into the emitting quantum dot layer. Pool-Frenkel effect is observed through temperature-dependent current density-voltage experiments, indicating the important role of trap states, and the addition of the insulating PMMA helps to reduce
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A turn-on fluorescent chemodosimeter for uranyl ions based on uranyl-promoted hydrolysis reaction J. Lumin. (IF 3.28) Pub Date : 2021-02-04 Na Lin; Jianing Hu; Wensheng Ren; Bo Gao; Jun Fu; Wenhua Luo
We demonstrate here a novel reaction-based chemodosimeter 2-[(4′-triphenylvinyl-biphenyl-4-ylimino)-methyl]-phenol (TPE-SA) for effective UO22+ recognition. TPE-SA responds to UO22+ with dramatical fluorescence enhancement and blue-shift, readily perceived even by the naked eye. Specifically, the fluorescence intensity at 500 nm is linearly correlated with the concentration of UO22+ ranging from 2
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Synthesis and luminescence studies of mixed phase LiCa3MgV3-XWXO12 phosphors for enhanced quantum yield J. Lumin. (IF 3.28) Pub Date : 2021-02-06 Yixuan Lv; Keyi Liu; Jian-Wen Shi; Zhihui Li; Jun Li; Xin Ji; Dandan Ma; Yajun Zou; Yonghong Cheng; Chunming Niu
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Thermoluminescence of Ce and Nd co-doped CaF2 phosphors after beta irradiation J. Lumin. (IF 3.28) Pub Date : 2021-02-05 H. Yazan; Z.G. Portakal-Uçar; S. Akça; M. Topaksu; P.D. Townsend; N. Can
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Germanotellurite glasses doped with ytterbium and neodymium - Their spectroscopic properties and thermometric capability J. Lumin. (IF 3.28) Pub Date : 2021-02-04 M. Łukaszewicz; R. Lisiecki
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Tuning hole transport layers and optimizing perovskite films thickness for high efficiency CsPbBr3 nanocrystals electroluminescence light-emitting diodes J. Lumin. (IF 3.28) Pub Date : 2021-02-04 Yongsheng Lu; Zhen Wang; Jiawen Chen; Yue Peng; Xiaosheng Tang; Zhenshan Liang; Fei Qi; Weiwei Chen
Metal halide perovskite nanocrystals (NCs) have sparked considerable attentions in the area of light-emitting diodes (LED) by virtue of their remarkable color purity and spectral tunability (400–700 nm). However, the optoelectronic performance of LED devices based on perovskite NCs is severely limited by the problem of charge injection since (i) the charge injection layers exhibit significant differences
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Multifunctional up/down-conversion luminescence of core/shell nanocomposite for self-monitored heating and fluorescence imaging J. Lumin. (IF 3.28) Pub Date : 2021-02-06 W.B. Dai; H. Li; Y. Chen; Y.M. Fan; F. Shen
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Synthesis of luminescent biotinylated multivalent dendrimer encapsulated quantum dots and investigation on its physico-chemical interactions with biological receptor avidin J. Lumin. (IF 3.28) Pub Date : 2021-01-29 Somashree Kundu; Susmita Maiti; Tushar Kanti Das; Sudip Karmakar; Chandra Nath Roy; Abhijit Saha
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Photophysicochemical behaviour of phenoxy propanoic acid functionalised zinc phthalocyanines when grafted onto iron oxide and silica nanoparticles: Effects in photodynamic antimicrobial chemotherapy J. Lumin. (IF 3.28) Pub Date : 2021-01-28 Edith Dube; Rodah Soy; Munyaradzi Shumba; Tebello Nyokong
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Thermoluminescence characteristics of CaF2:Mn irradiated to environmental-like doses J. Lumin. (IF 3.28) Pub Date : 2021-02-01 F.O. Ogundare; M.N. Raji
In this study, the thermoluminescence characteristics of CaF2:Mn chips exposed to environmental-like doses are examined. Thermoluminescence measurements, at different doses (0.04–7.2 mGy) and heating rates (1–25 °C/s), were carried out. The sample's glow curves were analyzed using glow curve deconvolution (GCD), whole glow peak (WGP) and initial rise (IR) methods. The glow curves of the chips, readout
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