Effect of CsF interlayer on the performance of polymer bulk heterojunction solar cells

被引：61
|
作者：
Jiang, Xiaoxia [1 ,2 ]
Xu, Hao [3 ]
Yang, Ligong [3 ]
Shi, Minmin [1 ,2 ]
Wang, Mang [1 ,2 ]
Chen, Hongzheng [1 ,2 ,3 ]
机构：
[1] Zhejiang Univ, Dept Polymer Sci & Engn, State Key Lab Silicon Mat, Hangzhou 310027, Peoples R China
[2] Zhejiang Univ, Minist Educ, Key Lab Macromol Synth & Functionalizat, Hangzhou 310027, Peoples R China
[3] Zhejiang Univ, Zhejiang Calif Int Nanosyst Inst, Hangzhou 310027, Peoples R China
来源：
SOLAR ENERGY MATERIALS AND SOLAR CELLS | 2009年 / 93卷 / 05期
基金：
中国博士后科学基金; 中国国家自然科学基金;
关键词：
Polymer bulk heterojunction; Solar cells; CsF; Interlayer; Series resistance; LIGHT-EMITTING DEVICES; ENHANCED ELECTRON INJECTION; EFFICIENT; CATHODE; INTERFACES; NETWORK; LAYERS;
D O I：
10.1016/j.solmat.2009.01.005
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：
We fabricated polymer bulk heterojunction solar cells with blends of poly (2-methoxy-5-(2'-ethylhexyloxy)-1,4-phenylenevinylene) (MEH-PPV) and [6,6]-phenyl C-61 butyric acid methyl ester (PCBM) by using CsF as an interlayer. Under illumination, the device with Al/CsF cathode exhibited a higher energy conversion efficiency compared to the Al/LiF cathode. The performance improvement with the Al/CsF cathode comes from the lower series resistance, which is almost constant (similar to 6 Omega cm(2)) for all the CsF layer thicknesses included in the present study. The mechanism responsible for this phenomenon is attributed to the dissociation of CsF upon Al deposition to liberate Cs with a low work function, which reduces the interface resistance of the active layer/cathode and enhances the interior electric field for more efficient charge transport in the device. (C) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码：650 / 653
页数：4
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