3-氨基丙基三甲氧基硅烷自组装提高染料敏化太阳能电池的效率.pdf

物理化学学报( Wuli Huaxue Xuebao)
Acta Phy:.-Chim.Sin.2011,27(2),419-424
419
Article
www.whxb.pku.edu.cn
3-氨基丙基三甲氧基硅烷自组装提高染料敏化太阳能电池的效率
劳春峰1初增泽2邹德春2
(海尔集团被术研发中心,山东青岛266103;2北京大学化学与分子工程学院,北京100871)
摘要:以3-氨某丙基三甲氧基硅烷(APTS)修饰的二氧化钛为负极制备的染料敏化太阳能电池在100mW
cm2的模拟太阳光照下的短路电流、开路电压、光电转换效率分别为18.32mA?cm2、775.9mV、9.15%.而没
有经过ATPS修饰的电池三项性能参数分别为18.08mAcm2749.9m、7.70%,修饰后电池的光电转换效
率提高了18.8%,同时填充因子由0.57提高为0.64.暗电流一电压曲线显示起始电压从-0.30V変化到-0.40
V,表明二氧化钛电极和电解液之间的暗反应得到了有效抑制,APTS作为阻挡层减少了-氧化钛电极表面的
缺陷与表面态.另外,通过实验设计,将APTS与染料层-层自组装于二氧化钛电极上,通过X射线光电子能谱
(XPS)研究了二氧化钛层、APTS、染料的作用形式.定性与定量结果表明:APTS中的乙氧基部分脱除后形成了
Si-O-T单桥或者双桥键,钉染料 CIS-RU( dcpyh2)a(SCN)通过分子中的部分ーCOOH与APTS中的一NH2形
成的静电作用力吸附在TiO2电柲上.傅里叶变换红外(FT-IR)光谱的结果进一步证明了这种分子间作用.
关键词:染料敏化太阳能电池;3-氨基丙基三甲氧基硅烷;自组装;一氧化钛;X射线光电子能谱
中图分类号:O649
Self-assembly of 3-aminopropyltrimethoxysilane to Improve the
Efficiency of Dye-sensitized Solar Cells
LAO Chun-feng
CHU Zeng-ze' ZOU De-chun
( Researchand Development Center ofhaier Group, Qingdao 206103, Shandong Province, P R Ch
College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P R. China)
Abstract: A dye-sensitized solar cell ( DSSC)based on a 3-aminopropyltrimethoxysilane( APTS
modified Tio electrode was fabricated. This cell generated a short current of 18.32 MA.cm", an open
voltage of 775.9 mv, and its overall photo-to-electricity conversion efficiency was 9.15%under 100 mw
cm"white light iradiation from a enon lamp. The three DSSC parameters for the bare Tio 2 electrode were
found to be 18.08 MA.cm", 7499 mv, and 7.70%. Compared with the unmodified solar cell, the
conversion efficiency improved by 18.8% and the fill factor improved from 0.57 to 0.64. This improvement is
attributed to the inhibition of the back reaction at the interface between the semiconductor and the
electrolyte. The dark current-applied voltage curve shows that the onset voltage shits from-030 to-0.40
V, which indicates a reduction in defects and surface states on the Tio> surface because of the presence of
APTS. Furthermore, special experiments were conducted to investigate the interaction among T1O>, APTS
and the cis-ru(dcpyh 2) SC) dye In these experiments, APTS and the dye were self-assembled onto a
TIO electrode in layers. The interaction was characterized by X-ray photoelectron spectroscopy(XPS)
Qualitative and quantitative results showed that the-och2ch was partially removed and it formed
mono-bridge or bi-bridge Si-o -Ti bonds. The cis-ru(dcpyh2) (CN) dye adsorbed onto APTS through
an electrostatic interaction between COOH and -NH 2 from the dye. FT-IR spectra further confirmed this
Received: September 13, 2010; Revised: November 24, 2010, Published on Web: December 22, 2010
Correspondingauthor.Email:dczou(@pku.edu.cn;Tel:+86-10-62759799
The project was supported by the National Natural Science Foundation of China(50125310, 90401028)and National Key Basic Research Program
of China(973)(2002CB613405)
国家自然科学基金(50125310,90401028)及国家重点基础研究发展规划项目(973)(2002CB613405)资助
C Editorial office of Acta Physico-chimica Sinica