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

页码：10015 / 10020

页数：6

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