CdSe quantum dot-sensitized solar cells exceeding efficiency 1% at full-sun intensity

被引：322

作者：

Lee, Hyo Joong ^{[1
]}

Yum, Jun-Ho ^{[1
]}

Leventis, Henry C. ^{[2
]}

Zakeeruddin, Shaik M. ^{[1
]}

Haque, Saif A. ^{[2
]}

Chen, Peter ^{[1
]}

Seok, Sang Il ^{[3
]}

Graetzel, Michael ^{[1
]}

Nazeeruddin, Md. K. ^{[1
]}

机构：

[1] Swiss Fed Inst Technol, Lab Photon & Interfaces, Inst Chem Sci & Engn, Sch Basic Sci, CH-1015 Lausanne, Switzerland

[2] Univ London Imperial Coll Sci Technol & Med, Dept Chem, London SW7 2AZ, England

[3] Korea Res Inst Chem Technol, Adv Mat Div, Global Res Lab, KRICT EPFL, Taejon 305600, South Korea

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2008年 / 112卷 / 30期

基金：

英国工程与自然科学研究理事会;

关键词：

D O I：

10.1021/jp802572b

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Colloidal cadmium selenide (CdSe) quantum dots QDs) have been prepared and exploited as inorganic dyes to sensitize a large-band-gap TiO2 layer for QD-sensitized solar cells. The optimized QD-sensitized solar cells exhibited an unprecedented incident photon-to-charge carrier generation efficiency of 36% and an overall conversion efficiency of over 1.7% at 0.1 sun and 1% at full sun intensity with a cobalt(II/III)-based redox system. The photovoltaic characteristics of CdSe QD-sensitized cells are compared with standard dye-sensitized solar cells, in which the former exhibited about half of the efficiency of the latter. From the kinetics of charge transfer monitored using transient spectroscopic and voltage decay measurements in the CdSe QD-sensitized cell, the regeneration yield of oxidized QDs was found to be close to almost unity, and the electron lifetime was longer in the CdSe QD-sensitized cell than in the dye-sensitized solar cell.

引用

页码：11600 / 11608

页数：9

共 64 条

[1] Dye-sensitized solar cells based on nanocrystalline TiO2 films surface treated with Al3+ ions:: Photovoltage and electron transport studies [J].