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Optical, Structural and Photoluminescence Properties of Gd x SrO: CdO Nanostructures Synthesized by Co Precipitation Method
Journal of Fluorescence ( IF 2.7 ) Pub Date : 2021-01-12 , DOI: 10.1007/s10895-021-02683-7
Vinayak Adimule , Santosh S. Nandi , B. C. Yallur , Debdas Bhowmik , Adarsha Haramballi Jagadeesha

To investigate the effect of Gd x SrO: CdO (x = 0.1, 0.3, 0.4) nanostructures (NS), in the present work an attempt has been made to synthesize Gdx SrO:CdO NS by co precipitation method. Structural properties were investigated by XRD (X-ray diffraction), FTIR (Fourier transform infrared spectroscopy), SEM (scanning electron microscopy), UV-Visible, XPS (X-ray photoelectron spectroscopy). XRD indicates having mixed phase of tetragonal crystal structure and SEM images indicate spherical shaped nanoparticles (NPs) of Gd x SrO:CdO with average size laying in between ~100 nm to ~130 nm. FTIR spectra of Gd x SrO: CdO NS show stretching and bending peaks of Gd-O-Gd, Cd-O-Cd and Sr-OH at ~1311 cm −1, ~1486 cm −1, ~ 3300 cm −1 and UV-visible optical absorptivity of Gd x SrO:CdO show absorption maxima shift from 330 nm to 324 nm (blue shift) and edges at 352.4 nm, 348 nm and 346.3 nm respectively for Gd concentration varying between 0.1, 0.3 and 0.4. binding energies of the Gd 3d 3/2, Sr 3d 3/2 and Cd 3d 3/2, O1s and C1s observed at 150.8 eV, 141.6 eV, 410.1 eV, 529.6 eV and 282.4 eV respectively which confirms the chemical composition of NS. Photoluminescence (PL) spectrum of Gd 0.4 Sr 0.5 O Cd 0.1O NS exhibit broad peaks from 338 nm to 397 nm centred around 369 nm with various Gd, O, Sr and Cd related native defects. Emission band observed at UV- Visible region for Gd 0.3 Sr 0.5 O Cd 0.2 O NS PL emission spectra has two emission peaks at 369 nm (UV region) and 550 nm (Visible region). The transitions can be ascertained with shielding of 4f shells of Gd+3 ions by 6 s, 5d shells by the interaction of the other Gd+3 ions.



中文翻译:

共沉淀法合成Gd x SrO:CdO纳米结构的光学,结构和光致发光性质

为了研究Gd x SrO:CdO(x = 0.1,0.3,0.4)纳米结构(NS)的影响,在本工作中,已经尝试通过共沉淀法合成Gd x SrO:CdO NS。通过XRD(X射线衍射),FTIR(傅立叶变换红外光谱),SEM(扫描电子显微镜),UV-可见光,XPS(X射线光电子能谱)研究了结构性能。XRD表示具有四方晶体结构的混合相,SEM图像表示Gd x SrO:CdO的球形纳米颗粒(NPs),平均尺寸在〜100 nm至〜130 nm之间。Gd x SrO:CdO NS的FTIR光谱显示Gd-O-Gd,Cd-O-Cd和Sr-OH的拉伸和弯曲峰在〜1311 cm -1,〜1486 cm-1,〜3300 cm -1和Gd x SrO:CdO的紫外可见光吸收率显示,随着Gd浓度的变化,吸收最大值从330 nm移至324 nm(蓝移),边缘分别在352.4 nm,348 nm和346.3 nm处在0.1、0.3和0.4之间。Gd 3d 3/2,Sr 3d 3/2和Cd 3d 3/2的结合能,O1和C1分别在150.8 eV,141.6 eV,410.1 eV,529.6 eV和282.4 eV观察到,这证实了NS的化学组成。Gd 0.4 Sr 0.5 O Cd 0.1的光致发光(PL)光谱O NS表现出从338 nm到397 nm的宽峰,中心在369 nm附近,具有各种Gd,O,Sr和Cd相关的天然缺陷。在Gd 0.3 Sr 0.5 O Cd 0.2 O NS PL的紫外可见区观察到的发射带在369 nm(紫外区)和550 nm(可见区)有两个发射峰。的转换可以与屏蔽的Gd 4F壳来确定3个由其他的Gd的相互作用通过6秒,5D壳离子+3离子。

更新日期:2021-01-12
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