期刊
ELECTROCHIMICA ACTA
卷 296, 期 -, 页码 142-148出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2018.10.194
关键词
SnO2/TiO2 microspheres; Dye-sensitized solar cells; Light scattering layer; Photovoltaic performance
资金
- National Natural Science Foundation of China [91433104, U1505241]
Hierarchical SnO2/TiO2 composite hollow microspheres were synthesized via one-step hydrothermal route by using titanium tetrabutoxide as titanium source and potassium stannate and tripolycyanamide as co-additive, and the samples were characterized by XRD, BET, SEM and TEM measurements. The results denoted that the synthesized microspheres with a diameter of ca 500-1000 nm were assembled by thin nanosheets and possessed a large surface area of 199.3 m(2) g(-1). In addition, EDX and element mapping measurements indicated that a small amount of SnO2 nanoparticles uniformly distributed among the nanosheets of microspheres. The hierarchical microspheres simultaneously facilitated dye adsorption, light harvesting, and electron transport, giving rise to a high photovoltaic conversion efficiency of 8.70% when applied as scattering layer for dye-sensitized solar cells, which was a 28.1% improvement compared to that of bare nanocrystalline TiO2 (6.79%, Dyesol) based cell. (C) 2018 Elsevier Ltd. All rights reserved.
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