Investigation of Mechanisms of Enhanced Open-Circuit Photovoltage of Dye-Sensitized Solar Cells Based the Electrolyte Containing 1-Hexyl-3-Methylimidazolium Iodide

Chin. Phys. Lett.

2006, Vol. 23

Issue (3): 724-727 DOI:

Original Articles

Investigation of Mechanisms of Enhanced Open-Circuit Photovoltage of Dye-Sensitized Solar Cells Based the Electrolyte Containing 1-Hexyl-3-Methylimidazolium Iodide

WANG Miao^1,2;ZHANG Qing-Li³;WENG Yu-Xiang³;LIN Yuan¹;XIAO Xu-Rui¹

¹Key Laboratory of Photochemistry, Center for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080 ²Graduate School of Chinese Academy of Sciences, Beijing 100080 ³Institute of Physics, Chinese Academy of Sciences, Beijing 100080

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WANG Miao, ZHANG Qing-Li, WENG Yu-Xiang et al 2006 Chin. Phys. Lett. 23 724-727

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Abstract The open-circuit photovoltage is improved by adding 1-hexyl-3-methylimidazolium iodide (HMImI) into the electrolyte. To investigate the mechanisms of the increase of the open-circuit photovoltage, we take the Mott--Schottky analysis and time-resolved mid-infrared absorption spectroscopy to study the band edge movement of TiO₂ and the rate of back electron transfer, respectively. The results indicate that the negative shift of the conduction band of TiO₂ is a predominant factor to increase the open-circuit photovoltage for the electrolyte containing HMImI.

Keywords: 82.80.Fk 78.47.+p 84.60.Dn

Published: 01 March 2006

PACS:	82.80.Fk	(Electrochemical methods)
	78.47.+p
	84.60.Dn

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https://cpl.iphy.ac.cn/ OR https://cpl.iphy.ac.cn/Y2006/V23/I3/0724

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	WANG Miao
	ZHANG Qing-Li
	WENG Yu-Xiang
	LIN Yuan
	XIAO Xu-Rui

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