Anion-correlated conduction band edge shifts and charge transfer kinetics in dye-sensitized solar cells with ionic liquid electrolytes

	Anion-correlated conduction band edge shifts and charge transfer kinetics in dye-sensitized solar cells with ionic liquid electrolytes
	Zhang M ; Zhang J ; Bai Y ; Wang YH ; Su M ; Wang P
刊名	physical chemistry chemical physics
	2011
卷号	13 期号:9 页码:3788-3794
关键词	TEMPERATURE MOLTEN-SALTS POLY(3 NANOCRYSTALLINE TIO2 4-ETHYLENEDIOXYTHIOPHENE) LOW-VISCOSITY EFFICIENCY PERFORMANCE DIFFUSION IMPEDANCE TRANSPORT DENSITY
ISSN号	1463-9076
通讯作者	wang p
中文摘要	in solvent-free ionic liquid electrolytes for efficient dye-sensitized solar cells, iodide and non-iodide melts are ordinarily blended in order to attain a high dynamic fluidity and thereby meet a fast mass transport of electroactive species. this common tactic could bring forth a prominent impact of various anions on cell efficiency by altering photocurrent and/or photovoltage. herein we report evident effects of the dicyanamide versus tetracyanoborate anion on the energetics of titania conduction band edge and the kinetics of multi-channel charge-transfer reactions in cells employing a high absorption coefficient ruthenium sensitizer c106. a slightly shorter photoluminescence lifetime of c106 grafted on alumina is probed for the tetracyanoborate-based reference cell with respect to the dicyanamide counterpart. however, owing to a more favourable thermodynamic driving force of similar to 90 mev, the tetracyanoborate anion prompts an almost 3-fold faster electron injection from the excited-state dye to titania than dicyanamide, leading to a higher charge separation yield, which is in good agreement with an almost indistinguishable ratio of external quantum efficiency enhancement in the whole spectral response region. compared to tetracyanoborate, the presence of dicyanamide at the titania/electrolyte interface evokes a 27-fold smaller interfacial electron exchange rate (k) with triiodide, accounting for the open-circuit photovoltage variation observed in current-voltage measurements.
收录类别	SCI收录期刊论文
语种	英语
WOS记录号	WOS:000287411700025
公开日期	2012-06-12
内容类型	期刊论文
源URL	[http://ir.ciac.jl.cn/handle/322003/45059]
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	Zhang M,Zhang J,Bai Y,et al. Anion-correlated conduction band edge shifts and charge transfer kinetics in dye-sensitized solar cells with ionic liquid electrolytes[J]. physical chemistry chemical physics,2011,13(9):3788-3794.
APA	Zhang M,Zhang J,Bai Y,Wang YH,Su M,&Wang P.(2011).Anion-correlated conduction band edge shifts and charge transfer kinetics in dye-sensitized solar cells with ionic liquid electrolytes.physical chemistry chemical physics,13(9),3788-3794.
MLA	Zhang M,et al."Anion-correlated conduction band edge shifts and charge transfer kinetics in dye-sensitized solar cells with ionic liquid electrolytes".physical chemistry chemical physics 13.9(2011):3788-3794.