Effects of TiO2 film thickness on photovoltaic properties of dye-sensitized solar cell and its enhanced performance by graphene combination

被引：58

作者：

Zhang, Haiyan ^{[1
]}

Wang, Wenguang ^{[1
]}

Liu, Hui ^{[1
]}

Wang, Rong ^{[1
]}

Chen, Yiming ^{[1
]}

Wang, Zhiwei ^{[2
]}

机构：

[1] Guangdong Univ Technol, Sch Mat & Energy, Guangzhou 510006, Guangdong, Peoples R China

[2] Chinese Acad Sci, Anhui Key Lab Nanomat & Nanostruct, Inst Solid State Phys, Hefei 230031, Peoples R China

来源：

MATERIALS RESEARCH BULLETIN | 2014年 / 49卷

基金：

中国国家自然科学基金;

关键词：

Composites; Semiconductors; Impedance spectroscopy; Electrochemical properties; LOW-TEMPERATURE FABRICATION; NANOTUBE; CARBON;

D O I：

10.1016/j.materresbull.2013.08.058

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Dye-sensitized solar cells based on TiO2 films with different printing layers (6-10) were fabricated by screen printing method. The prepared samples were characterized by scanning electron microscopy, X-ray diffraction and UV-vis absorption spectroscopy. The effects of thickness on the photoelectric conversion performance of the as-fabricated DSSCs were investigated. An optimum photoelectric conversion efficiency of 5.52% was obtained in a DSSC with 8 printing layers. Furthermore, after a moderate amount of graphene was combined with TiO2, the photoelectric conversion efficiency of the DSSC based on graphene/TiO2 composite film rose from 5.52% to 6.49%, with an increase of eta by 17.6%. The results indicated that graphene not only enhances the transport of electrons from the film to the fluorine doped tin oxide substrates and reduces the charge recombination rate, but also reduces the electrolyte-electrode interfacial resistance, clearly increasing the photoelectric conversion efficiency. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：126 / 131

页数：6

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