Influences of deposition and post-annealing temperatures on properties of TiO2 blocking layer prepared by spray pyrolysis for solid-state dye-sensitized solar cells

被引:20
作者
Jiang, Changyun [1 ]
Leung, Man Yin [1 ]
Koh, Wei Ling [1 ]
Li, Yuning [1 ,2 ,3 ]
机构
[1] ASTAR, Inst Mat Res & Engn, Singapore 117602, Singapore
[2] Univ Waterloo, Dept Chem Engn, Waterloo, ON N2L 3G1, Canada
[3] Univ Waterloo, WIN, Waterloo, ON N2L 3G1, Canada
关键词
Solid electrolyte; Dye-sensitized solar cells; Blocking layer; Spray pyrolysis; ANCHORED TITANIUM-OXIDE; PHOTOCATALYTIC REDUCTION; CHARGE RECOMBINATION; ORGANIC-DYE; FILMS; EFFICIENCY; EVAPORATION; CATALYSTS; PLASMA;
D O I
10.1016/j.tsf.2011.06.012
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Influences of the temperature (T-s) for spray pyrolysis deposition of TiO2 blocking layer (BL) using titanium diisopropoxide bis(acetylacetonate) (TAA) as a precursor and the temperature (T-p) for post-annealing of the BL films on the resulting BL film morphology and photovoltaic performance of solid-state dye-sensitized solar cells (SDSC) are investigated. A T-s ranging from 300 to 400 degrees C is found preferable for the formation of BL films with smooth surface and dense grain packing. A T-s lower than 300 degrees C results in insufficient decomposition of the TAA precursor and is unable to form smooth BL films, while a T-s over 400 degrees C leads to loosely packed grain in BL films. Power conversion efficiency (PCE) of similar to 4.0% is obtained for SDSC devices with BL films prepared at a T-s in the range of 300-450 degrees C. High temperature post-annealing (T-p = 500-550 degrees C) of the BL films prepared at a low T-s, such as 300 degrees C, can improve the PCE up to 4.6%. The improvements are considered due to the higher purity, increased crystallinity, and retained high grain packing density of the post-annealed BL films, which facilitate charge transport and suppress charge recombination. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码:7850 / 7854
页数:5
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