Passivation of nanocrystalline TiO2 junctions by surface adsorbed phosphinate amphiphiles enhances the photovoltaic performance of dye sensitized solar cells

被引：99
作者：
Wang, Mingkui [1 ]
Li, Xin [2 ]
Lin, Hong [2 ]
Pechy, Peter [1 ]
Zakeeruddin, Shaik M. [1 ]
Graetzel, Michael [1 ]
机构：
[1] Swiss Fed Inst Technol, Lab Photon & Interfaces, CH-1015 Lausanne, Switzerland
[2] Tsinghua Univ, Dept Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R China
来源：
DALTON TRANSACTIONS | 2009年 / 45期
关键词：
BAND-EDGE MOVEMENT; CHARGE RECOMBINATION; TRANSPORT; COADSORBENT; ELECTRODES; EFFICIENCY; CONVERSION; DESIGN; ACIDS;
D O I：
10.1039/b908673k
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
We report a new class of molecular insulators that electronically passivate the surface of nanocrystalline titania films for high performance dye sensitized solar cells (DSC). Using electrical impedance measurements we demonstrate that co-adsorption of dineohexyl bis-(3,3-dimethyl-butyl)-phosphinic acid (DINHOP), along with the amphiphilic ruthenium sensitizer Z907Na increased substantially the power output of the cells mainly due to a retardation of interfacial recombination of photo-generated charge carriers. The use of phosphinates as anchoring groups opens up new avenues for modification of the surface by molecular insulators, sensitizers and other electro-active molecules to realize the desired optoelectronic performance of devices based on oxide junctions.
引用
收藏
页码：10015 / 10020
页数：6
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