Low work function metal modified ITO as cathode for inverted polymer solar cells

被引：91

作者：

Jiang, Chang Yun ^{[1
]}

Sun, Xiao Wei ^{[2
]}

Zhao, De Wei ^{[2
]}

Kyaw, Aung Ko Ko ^{[2
]}

Li, Yu Ning ^{[1
]}

机构：

[1] ASTAR, Inst Mat Res & Engn, Singapore 117602, Singapore

[2] Nanyang Technol Univ, Sch Elect & Elect Engn, Singapore 639798, Singapore

来源：

SOLAR ENERGY MATERIALS AND SOLAR CELLS | 2010年 / 94卷 / 10期

关键词：

Organic photovoltaics; Inverted polymer solar cells; Air stability; ITO cathode; Surface modification; MORPHOLOGY;

D O I：

10.1016/j.solmat.2010.04.082

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

Inverted polymer solar cells using an ultrathin layer (similar to 1 nm) of low work function metal (Ca, Mg, Al, and Ag) on indium tin oxide (ITO) substrate as the cathode, MoO3/Au as the anode, and a blend of poly(3-hexylthiophene) (P3HT) and 1-(3-methoxycarbonyl)-propyl-1-phenyl-(6,6)C61 (PCBM) as the active layer were investigated. A comparative study between the conventional forward (ITO/MoO3/P3HT:PCBM/Ca/Ag) and inverted (ITO/Ca/P3HT:PCBM/MoO3/Au) cells shows that the inverted cell has an increase of 29% in power conversion efficiency and an increase of 750% in the cell's shelf lifetime when compared with the corresponding forward cell. The enhancement of efficiency for the inverted cell is due to reduced charge recombination, while the improvement of air stability is due to the better protection of the air sensitive low work function metal in the inverted cell. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：1618 / 1621

页数：4

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