Lithium-Modulated Conduction Band Edge Shifts and Charge-Transfer Dynamics in Dye-Sensitized Solar Cells Based on a Dicyanamide Ionic Liquid

	Lithium-Modulated Conduction Band Edge Shifts and Charge-Transfer Dynamics in Dye-Sensitized Solar Cells Based on a Dicyanamide Ionic Liquid
	Bai Y ; Zhang J ; Wang YH ; Zhang M ; Wang P
刊名	langmuir
	2011
卷号	27 期号:8 页码:4749-4755
关键词	SOLID POLYMER ELECTROLYTE NANOCRYSTALLINE TIO2 CONVERSION EFFICIENCY RUTHENIUM SENSITIZER RECOMBINATION INJECTION PERFORMANCE DIFFUSION IMPEDANCE FILMS
ISSN号	0743-7463
通讯作者	zhang m
中文摘要	lithium ions are known for their potent function in modulating the energy alignment at the oxide semiconductor/dye/electrolyte interface in dye-sensitized solar cells (dscs), offering the opportunity to control the associated multichannel charge-transfer dynamics. herein, by optimizing the lithium iodide content in 1-ethyl-3-methylimidazolium dicyanamide-based ionic liquid electrolytes, we present a solvent-free dsc displaying an impressive 8.4% efficiency at 100 mw cm(-2) am1.5g conditions. we further scrutinize the origins of evident impacts of lithium ions upon current density voltage characteristics as well as photocurrent action spectra of dscs based thereon. it is found that, along with a gradual increase of the lithium. content in ionic liquid electrolytes, a consecutive diminishment of the open circuit photovoltage arises, primarily owing to a noticeable downward movement of the titania conduction band edge. the conduction band edge displacement away from vacuum also assists the formation of a more favorable energy offset at the titania/dye interface, and thereby leads to a faster electron injection rate and a higher exciton dissociation yield as implied by transient emission measurements. we also notice that the adverse influence of the titania conduction band edge downward shift arising from lithium addition upon photovoltage is partly compensated by a concomitant suppression of the triiodide involving interfacial charge recombination.
收录类别	SCI收录期刊论文
语种	英语
WOS记录号	WOS:000289321000062
公开日期	2012-06-11
内容类型	期刊论文
源URL	[http://ir.ciac.jl.cn/handle/322003/44695]
专题	长春应用化学研究所_长春应用化学研究所知识产出_期刊论文
推荐引用方式 GB/T 7714	Bai Y,Zhang J,Wang YH,et al. Lithium-Modulated Conduction Band Edge Shifts and Charge-Transfer Dynamics in Dye-Sensitized Solar Cells Based on a Dicyanamide Ionic Liquid[J]. langmuir,2011,27(8):4749-4755.
APA	Bai Y,Zhang J,Wang YH,Zhang M,&Wang P.(2011).Lithium-Modulated Conduction Band Edge Shifts and Charge-Transfer Dynamics in Dye-Sensitized Solar Cells Based on a Dicyanamide Ionic Liquid.langmuir,27(8),4749-4755.
MLA	Bai Y,et al."Lithium-Modulated Conduction Band Edge Shifts and Charge-Transfer Dynamics in Dye-Sensitized Solar Cells Based on a Dicyanamide Ionic Liquid".langmuir 27.8(2011):4749-4755.