The role of ZnO-coating-layer thickness on the recombination in CdS quantum-dot-sensitized solar cells

被引：24

作者：

Choi, Hongsik ^{[1
]}

Kim, Jongmin ^{[1
]}

Nahm, Changwoo ^{[1
]}

Kim, Chohui ^{[1
]}

Nam, Seunghoon ^{[1
]}

Kang, Joonhyeon ^{[1
]}

Lee, Byungho ^{[1
]}

Hwang, Taehyun ^{[1
]}

Kang, Suji ^{[1
]}

Choi, Dong Joo ^{[2
]}

Kim, Young-Ho ^{[2
]}

Park, Byungwoo ^{[1
]}

机构：

[1] Seoul Natl Univ, Res Inst Adv Mat, Dept Mat Sci & Engn, WCU Hybrid Mat Program, Seoul 151744, South Korea

[2] Hanyang Univ, Coll Engn, Div Mat Sci & Engn, Seoul 133791, South Korea

来源：

NANO ENERGY | 2013年 / 2卷 / 06期

基金：

新加坡国家研究基金会;

关键词：

Quantum-dot-sensitized solar cells; Cadmium sulfide; Coating; Zinc oxide; Solar cells; PHOTOVOLTAIC PERFORMANCE; THIN-FILMS; SEMICONDUCTOR; ELECTRON; DYNAMICS; PBS;

D O I：

10.1016/j.nanoen.2013.05.007

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：

To prevent recombination at the interface of TiO2/polysulfide-electrolyte, a ZnO layer was deposited on a TiO2 electrode. The optimized ZnO-coated solar cell exhibited a 32% increase in the power-conversion efficiency compared to the bare cell. The coating layer acts as an energy barrier, which plays an important role in reducing the charge recombination from the TiO2 electrode to the electrolyte. Moreover, CdS quantum-dot adsorption was enhanced by employing the ZnO-coated layer. The thicker ZnO layer (more than 8-cycle deposition), however, led to a less porous electrode, as confirmed by electrolyte diffusivity, and also deteriorated the cell efficiency by introducing defect states verified by electron lifetime and chronoamperometric reduction current. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：1218 / 1224

页数：7

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