Improved conversion efficiency of CdS quantum dots-sensitized TiO2 nanotube array using ZnO energy barrier layer

被引：48

作者：

Chen, Chong ^{[1
]}

Xie, Yi ^{[1
]}

Ali, Ghafar ^{[1
]}

Yoo, Seung Hwa ^{[1
]}

Cho, Sung Oh ^{[1
]}

机构：

[1] Korea Adv Inst Sci & Technol, Dept Nucl & Quantum Engn, Taejon 305701, South Korea

来源：

NANOTECHNOLOGY | 2011年 / 22卷 / 01期

关键词：

OPTICAL-ABSORPTION EDGE; SOLAR-CELLS; EXTINCTION COEFFICIENT; TITANIUM-DIOXIDE; PBS; SEMICONDUCTOR; ELECTRODES; FILMS; CDTE;

D O I：

10.1088/0957-4484/22/1/015202

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We report that the use of a chemically deposited ZnO energy barrier between a CdS quantum dot sensitizer and TiO2 nanotubes (TNTs) can improve the efficiency of quantum dots-sensitized solar cells (QDSCs). The experimental results show that the formation of the ZnO layers over TNTs significantly improved the performances of the CdS QDSCs based on the TNTs electrodes. In particular, a maximum photoconversion efficiency of 4.6% was achieved for the CdS/ZnO/TNTs electrode under UV-visible light illumination, corresponding to an increase of 43.7% as compared to the CdS/TNTs electrode without the ZnO layers. The improved CdS QDSCs efficiency is attributed to the suppressed recombination of photoinjected electrons with redox ions from the electrolyte resulting from the ZnO energy barrier layers.

引用

页数：8

共 42 条

[1] Photosensitization of TiO2 Nanostructures with CdS Quantum Dots: Particulate versus Tubular Support Architectures [J].

Baker, David R. ;

Kamat, Prashant V. .

ADVANCED FUNCTIONAL MATERIALS, 2009, 19 (05) :805-811

[2] Synthesis of Coupled Semiconductor by Filling 1D TiO2 Nanotubes with CdS [J].

Banerjee, Subarna ;

Mohapatra, Susanta K. ;

Das, Prajna P. ;

Misra, Mano .

CHEMISTRY OF MATERIALS, 2008, 20 (21) :6784-6791

[3] Analysis of the mechanisms of electron recombination in nanoporous TiO2 dye-sensitized solar cells.: Nonequilibrium steady-state statistics and interfacial electron transfer via surface states [J].

Bisquert, J ;

Zaban, A ;

Salvador, P .

JOURNAL OF PHYSICAL CHEMISTRY B, 2002, 106 (34) :8774-8782

[4] Dye-Sensitized Solar Cells with a High Absorptivity Ruthenium Sensitizer Featuring a 2-(Hexylthio)thiophene Conjugated Bipyridine [J].

Cao, Yiming ;

Bai, Yu ;

Yu, Qingjiang ;

Cheng, Yueming ;

Liu, Shi ;

Shi, Dong ;

Gao, Feifei ;

Wang, Peng .

JOURNAL OF PHYSICAL CHEMISTRY C, 2009, 113 (15) :6290-6297

[5] Preparation of Nb2O5 coated TiO2 nanoporous electrodes and their application in dye-sensitized solar cells [J].

Chen, SG ;

Chappel, S ;

Diamant, Y ;

Zaban, A .

CHEMISTRY OF MATERIALS, 2001, 13 (12) :4629-4634

[6] A CdS-modified TiO2 nanocrystalline photoanode for efficient hydrogen generation by visible light [J].

Chi, Ching-Fa ;

Lee, Yuh-Lang ;

Weng, Huang-Shan .

NANOTECHNOLOGY, 2008, 19 (12)

[7] Enhance the optical absorptivity of nanocrystalline TiO2 film with high molar extinction coefficient ruthenium sensitizers for high performance dye-sensitized solar cells [J].

Gao, Feifei ;

Wang, Yuan ;

Shi, Dong ;

Zhang, Jing ;

Wang, Mingkui ;

Jing, Xiaoyan ;

Humphry-Baker, Robin ;

Wang, Peng ;

Zakeeruddin, Shaik M. ;

Graetzel, Michael .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2008, 130 (32) :10720-10728

[8] CdTe Quantum Dots-Sensitized TiO2 Nanotube Array Photoelectrodes [J].

Gao, Xian-Feng ;

Li, Hong-Bo ;

Sun, Wen-Tao ;

Chen, Qing ;

Tang, Fang-Qiong ;

Peng, Lian-Mao .

JOURNAL OF PHYSICAL CHEMISTRY C, 2009, 113 (18) :7531-7535

[9] Hybrid solar cells [J].

Guenes, Serap ;

Sariciftci, Niyazi Serdar .

INORGANICA CHIMICA ACTA, 2008, 361 (03) :581-588

[10] Comparison of Dye- and Semiconductor-Sensitized Porous Nanocrystalline Liquid Junction Solar Cells [J].

Hodes, Gary .

JOURNAL OF PHYSICAL CHEMISTRY C, 2008, 112 (46) :17778-17787

← 1 2 3 4 5 →