Abstract
Hybrid carbon dots/titanium dioxide (CDs/TiO2) photoelectrodes for use in high-performance dye-sensitized photovoltaic solar cells were obtained by a facile one-step hydrothermal approach. The structural, morphological, and optical properties of the as-obtained samples were analyzed by powder X-ray diffraction analysis, transmission electron microscopy, Raman spectroscopy, ultraviolet–visible (UV–Vis) diffuse reflectance spectroscopy, and photoluminescence spectroscopy, revealing anatase crystal structure with individual spherical molded nanoparticles for both TiO2 and the composite samples. The size of the nanoparticles ranged from 30 to 40 nm, being consistently decorated on the carbon dots. The CDs/TiO2 samples exhibited enhanced surface area (112 m2/g) and pore size (30–35 nm) compared with bare TiO2 (77 m2/g and 42–48 nm), which is invaluable for improving solar cell efficiency. The J–V characteristic illustrated that the CDs/TiO2 photoanode resulted in high photovoltaic conversion efficiency (PCE) of 15.5% compared with 7.8% when using bare TiO2. These results suggest that incorporation of carbon dots enhanced the PCE of the cells using bare TiO2. A mechanism for this improvement is also proposed in detail.
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J. Qi, K. Zhao, G. Li, Y. Gao, H. Zhao, R. Yu, Z. Tang, Multi-shelled CeO2 hollow microspheres as superior photocatalysts for water oxidation. Nanoscale. 6, 4072–4077 (2014)
Q. Zhang, E. Uchaker, S.L. Candelaria, G. Cao, Nanomaterials for energy conversion and storage. Chem. Soc. Rev. 42, 3127–3171 (2013)
N.Q. Wu, J. Wang, D. Tafen, H. Wang, J.-G. Zheng, J.P. Lewis, X. Liu, S.S. Leonard, A. Manivannan, Shape-enhanced photocatalytic activity of single-crystalline anatase TiO2, (101) nanobelts. J. Am. Chem. Soc. 132, 6679–6685 (2010)
J. Tian, Y. Sang, G. Yu, H. Jiang, X. Mu, H. Liu, A Bi2WO6-based hybrid photocatalyst with broad spectrum photocatalytic properties under UV, visible, and near-infrared irradiation. Adv. Mater. 25, 5075–5080 (2013)
J.-L. Lan, Z. Liang, Y.-H. Yang, F.S. Ohuchi, S.A. Jenekhe, G. Cao, The effect of SrTiO3: ZnO as cathodic buffer layer for inverted polymer solar cells. Nano Energy 4, 140–149 (2014)
L. Wang, T. Sasaki, Titanium oxide nanosheets: graphene analogues with versatile functionalities. Chem. Rev. 114, 9455–9486 (2014)
M.K. Nazeeruddin, A. Kay, I. Rodicio, R. Humphry-Baker, E. Müller, P. Liska, N. Vlachopoulos, M. Graetzel, Conversion of light to electricity by cis-X2bis(2,2′-bipyridyl-4,4′-dicarboxylate) ruthenium(II) charge-transfer sensitizers (X=Cl−, Br−, I−, CN−, and SCN−) on nanocrystalline TiO2 electrodes. J. Am. Chem. Soc. 8, 6382–6390 (1993)
A. Hagfeldt, M. Grätzel, Molecular photovoltaics. Acc. Chem. Res. 8, 269–277 (2000)
M. Grätzel, Photo electrochemical cells. Nature 8, 338–344 (2001)
J. Lim, M. Lee, S.K. Balasingam, J. Kim, D. Kim, Y. Jun, Fabrication of panchromatic dye-sensitized solar cells using pre-dye coated TiO2 nanoparticles by a simple dip coating technique. RSC Adv. 8, 4801–4805 (2013)
F.H. Ali, D.B. Alwan, Effect of particle size of TiO2 and additive materials to improve dye sensitized solar cells efficiency. J. Phys. 1003, 012077 (2018)
S. Kumar, S. Pradhan, A. Dhar, Enhanced performance with the incorporation of organo-metal trihalide perovskite in nanostructured ZnO solar cell. Proc. Eng. 141, 1–6 (2016)
F. Wang, Y. Zhang, M. Yang, J. Du, L. Yang, L.S Fan, Y. Sui, X. Liu, J. Yang, Achieving efficient flexible perovskite solar cells with room-temperature processed tungsten oxide electron transport layer. J. Power Sour. 440 227157 (2019)
V.-D. Dao, L.L. Larina, J.-K. Lee, K.-D. Jung, B.T. Huye, H.-S. Choi, Graphene-based RuO2 nanohybrid as a highly efficient catalyst for triiodide reduction in dye-sensitized solar cells. Carbon 81, 710–719 (2015)
X. Guo, W. Di, C. Chen, X. Wang, W. Qin, Enhanced near-infrared photocatalysis of NaYF4:Yb, Tm/CdS/TiO2 composites. Dalton Trans. 43, 1048–1054 (2014)
S.U. Khan, M. Al-Shahry, W.B. Ingler, Efficient photochemical water splitting by a chemically modified n-TiO2. Science 297, 2243–2245 (2002)
J. Tian, Z. Zhao, A. Kumar, R.I. Boughton, H. Liu, Recent progress in design, synthesis, and applications of one-dimensional TiO2 nanostructured surface heterostructures: a review. Chem. Soc. Rev. 43, 6920–6937 (2014)
B. Seger, J. McCray, A. Mukherji, X. Zong, Z. Xing, L. Wang, An n-type to p-type switchable photoelectrode assembled from alternating exfoliated titania nanosheets and polyaniline layers. Angew. Chem. Int. Ed. 52, 6400–6403 (2013)
X. Wang, Z. Li, J. Shi, Y. Yu, One-dimensional titanium dioxide nanomaterials: nanowires, nanorods, and nanobelts. Chem. Rev. 114, 9346–9384 (2014)
X. Han, Y. Han, H. Huang, H. Zhang, X. Zhang, R. Liu, Y. Liu, Z. Kang, Synthesis of carbon quantum dots/SiO2 porous nanocomposites and their catalytic ability for photo-enhanced hydrocarbon selective oxidation. Dalton Trans. 42, 10380–10383 (2013)
K. Li, F.Y. Su, W.D. Zhang, Modification of g-C3N4 nanosheets by carbon quantum dots for highly efficient photocatalytic generation of hydrogen. Appl. Surf. Sci. 375, 110–117 (2016)
S. Qu, X Wang, Q. Lu, X. Liu, L. Wang, A biocompatible fluorescent ink based on water-soluble luminescent carbon nanodots. Angew. Chem. 124 12381–12384 (2012)
M. Parthibavarman, K. Vallalperuman, S. Sathishkumar, M. Durairaj, K. Thavamani, A novel microwave synthesis of nanocrystalline SnO2 and its structural optical and dielectric properties. J. Mater. Sci. Mater. Electron. 25, 730–735 (2014)
L.A.A. Rodríguez, M. Pianassola, D.N. Travess, Production of TiO2 coated multiwall carbon nanotubes by the sol–gel technique. Mater. Res. 20, 96–103 (2017)
M. Parthibavarman, M. Karthik, S. Prabhakaran, Facile and one step synthesis of WO3 nanorods and nanosheets as an efficient photocatalyst and humidity sensing material. Vacuum 155, 224–232 (2018)
M. Parthibavarman, S. Sathishkumar, M. Jayashree, R. BoopathiRaja, Microwave-assisted synthesis of pure and Ag-doped SnO2 quantum dots as novel platform for high photocatalytic activity performance. J. Clust. Sci. 30, 351–363 (2019)
M. Parthibavarman, S. Sathishkumar, S. Prabhakaran, M. Jayashree, R. BoopathiRaja, High visible light-driven photocatalytic activity of large surface area Cu doped SnO2 nanorods synthesized by novel one-step microwave irradiation method. J. Iran. Chem. Soc. 15, 2789–2801 (2018)
M. Parthibavarman, M. Karthik, P. Sathishkumar, R. Poonguzhali, Rapid synthesis of novel Cr-doped WO3 nanorods: an efficient electrochemical and photocatalytic performance. J. Iran. Chem. Soc. 15, 1419–1430 (2018)
S. Singh, A. Singh, N. Kaur, Efficiency investigations of organic/inorganic hybrid ZnO nanoparticles based dye-sensitized solar cells. J. Mater. 2016, 11 (2016)
Z. Li, F. Gong, G. Zhou, Z.-S. Wang, NiS2/reduced graphene oxide nanocomposites for efficient dye-sensitized solar cells. J. Phys. Chem. C 117, 6561–6566 (2013)
M. Indhumathy, A. Prakasam, A one pot hydrothermal stimulated CdS-reduced graphene oxide (CdS/rGO) hybrid nanocomposite for high performance photovoltaic applications. J. Mater. Sci. Mater. Electron. 20, 15444–15451 (2019)
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Padmanathan, S., Prakasam, A. Design and fabrication of hybrid carbon dots/titanium dioxide (CDs/TiO2) photoelectrodes for highly efficient dye-sensitized solar cells. J Mater Sci: Mater Electron 31, 3492–3499 (2020). https://doi.org/10.1007/s10854-020-02897-8
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DOI: https://doi.org/10.1007/s10854-020-02897-8