Facile solution growth of vertically aligned ZnO nanorods sensitized with aqueous CdS and CdSe quantum dots for photovoltaic applications

被引：59

作者：

Luan, Chunyan ^{[1
,2
]}

Vaneski, Aleksandar ^{[1
,3
]}

Susha, Andrei S. ^{[1
,3
]}

Xu, Xueqing ^{[1
,3
]}

Wang, Hong-En ^{[1
,2
]}

Chen, Xue ^{[1
,2
]}

Xu, Jun ^{[1
,2
]}

Zhang, Wenjun ^{[1
,2
]}

Lee, Chun-Sing ^{[1
,2
]}

Rogach, Andrey L. ^{[1
,3
]}

Zapien, Juan Antonio ^{[1
,2
]}

机构：

[1] City Univ Hong Kong, Dept Phys & Mat Sci, Kowloon, Hong Kong, Peoples R China

[2] City Univ Hong Kong, Ctr Super Diamond & Adv Films COSDAF, Kowloon, Hong Kong, Peoples R China

[3] City Univ Hong Kong, CFP, Kowloon, Hong Kong, Peoples R China

来源：

NANOSCALE RESEARCH LETTERS | 2011年 / 6卷

关键词：

SOLAR-CELLS; DYE; NANOCRYSTALS; ARRAYS; ROUTE;

D O I：

10.1186/1556-276X-6-340

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Vertically aligned single crystalline ZnO nanorod arrays, approximately 3 mu m in length and 50-450 nm in diameter are grown by a simple solution approach on a Zn foil substrate. CdS and CdSe colloidal quantum dots are assembled onto ZnO nanorods array using water-soluble nanocrystals capped as-synthesized with a short-chain bifuncional linker thioglycolic acid. The solar cells co-sensitized with both CdS and CdSe quantum dots demonstrate superior efficiency compared with the cells using only one type of quantum dots. A thin Al2O3 layer deposited prior to quantum dot anchoring successfully acts as a barrier inhibiting electron recombination at the Zn/ZnO/electrolyte interface, resulting in power conversion efficiency of approximately 1% with an improved fill factor of 0.55. The in situ growth of ZnO nanorod arrays in a solution containing CdSe quantum dots provides better contact between two materials resulting in enhanced open circuit voltage.

引用

页数：8

共 32 条

[1] Optically pumped lasing of ZnO at room temperature [J].