12 October 2009 Preparation and photoelectric properties of mesoporous ZnO/TiO2 composite films for DSSC
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Abstract
Mesoporous TiO2/ZnO (M-TiO2-xZn (x=10, 30, 50, 70, 90)) composite films have been prepared in sol-gel method by spin coating process. The films have sponge-like microcrystalline phase structures, as evidenced from TEM. The SAXRD patterns of M-TiO2-xZn thin films suggest that the films exhibit mesoporous structure. The diameter/d value of thin films is around 11.76 nm, 7.88 nm, 6.89 nm, 10.02 nm and 13.78 nm, respectively. UV/vis transmittance spectra indicate that the fundamental transmittance edge of M-TiO2-xZn films has a blue shift from 350 nm to 310 nm firstly, and then has a red shift. Photoluminescence (PL) spectra of M-TiO2-xZn have three emission peaks, which are caused by near-band edge (NBE) emission and structural defects or/and impurities M-TiO2-xZn thin films display a positive photovoltaic effect with the Zn content increased above 70 mol %, which may improve the energy conversion efficiency of M-TiO2-xZn in Dye-sensitized solar cells (DSSC).
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Mingming Wu, Mingming Wu, Yue Shen, Yue Shen, Feng Gu, Feng Gu, Yun Zhang, Yun Zhang, Yian Xie, Yian Xie, Jiancheng Zhang, Jiancheng Zhang, } "Preparation and photoelectric properties of mesoporous ZnO/TiO2 composite films for DSSC", Proc. SPIE 7518, Photonics and Optoelectronics Meetings (POEM) 2009: Solar Cells, Solid State Lighting, and Information Display Technologies, 75180T (12 October 2009); doi: 10.1117/12.843356; https://doi.org/10.1117/12.843356
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