Correlation between Energy and Spatial Distribution of Intragap Trap   States in the TiO2 Photoanode of Dye-Sensitized Solar Cells

doi:10.1002/cphc.201500075

CORC > 北京大学 > 化学与分子工程学院

	Correlation between Energy and Spatial Distribution of Intragap Trap States in the TiO2 Photoanode of Dye-Sensitized Solar Cells
	Wang, Yi ; Wu, Dapeng ; Fu, Li-Min ; Ai, Xi-Cheng ; Xu, Dongsheng ; Zhang, Jian-Ping
刊名	CHEMPHYSCHEM
	2015
关键词	charge recombination chemical capacitance dye-sensitized solar cells electron transport sensitizers NANOSTRUCTURED SEMICONDUCTOR ELECTRODES NANOCRYSTALLINE PHOTOVOLTAIC CELLS DIFFUSION-COEFFICIENT CHARGE-TRANSPORT BACK-REACTION IMPEDANCE SPECTROSCOPY RECOMBINATION KINETICS INTENSITY DEPENDENCE AMBIPOLAR DIFFUSION CYCLIC VOLTAMMETRY
DOI	10.1002/cphc.201500075
英文摘要	The energy and spatial distribution of intragap trap states of the TiO2 photoanode of dye-sensitized solar cells and their impact on charge recombination were investigated by means of time-resolved charge extraction (TRCE) and transient photo-voltage (TPV). The photoanodes were built from TiO2 nanospheroids with different aspect ratios, and the TRCE results allowed differentiation of two different types of trap states, that is, deep and shallow ones at the surface and in the bulk of the TiO2 particles, respectively. These trap states exhibit distinctly different characteristic energy with only a slight variation in the particle size, as derived from the results of the density of states. Analyses of the size-dependent TPV kinetics revealed that in a moderate photovoltage regime of about 375-625 mV, the dynamics of electron recombination are dominated by shallow trap states in the bulk, which can be well accounted for by the mechanism of multiple-trap-limited charge transport.; Natural Science Foundation of China [20933010, 21133001, 21173266]; Fundamental Research Funds for the Central Universities of China [10XNI007]; SCI(E); PubMed; ARTICLE; xcai@chem.ruc.edu.cn; jpzhang@chem.ruc.edu.cn; 10; 2253-2259; 16
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/418216]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	Wang, Yi,Wu, Dapeng,Fu, Li-Min,et al. Correlation between Energy and Spatial Distribution of Intragap Trap States in the TiO2 Photoanode of Dye-Sensitized Solar Cells[J]. CHEMPHYSCHEM,2015.
APA	Wang, Yi,Wu, Dapeng,Fu, Li-Min,Ai, Xi-Cheng,Xu, Dongsheng,&Zhang, Jian-Ping.(2015).Correlation between Energy and Spatial Distribution of Intragap Trap States in the TiO2 Photoanode of Dye-Sensitized Solar Cells.CHEMPHYSCHEM.
MLA	Wang, Yi,et al."Correlation between Energy and Spatial Distribution of Intragap Trap States in the TiO2 Photoanode of Dye-Sensitized Solar Cells".CHEMPHYSCHEM (2015).