Effects of the optical microcavity on the performance of ITO-free polymer solar cells with WO3/Ag/WO3 transparent electrode

被引：62

作者：

Yu, Wenjuan ^{[1
]}

Shen, Liang ^{[1
]}

Meng, Fanxu ^{[1
]}

Long, Yongbing ^{[2
]}

Ruan, Shengping ^{[1
]}

Chen, Weiyou ^{[1
]}

机构：

[1] Jilin Univ, Coll Elect Sci & Engn, State Key Lab Integrated Optoelect, Changchun 130012, Peoples R China

[2] WuYi Univ, Sch Appl Phys & Mat, Inst Thin Film & Nanomat, Jiangmen 529020, Peoples R China

来源：

SOLAR ENERGY MATERIALS AND SOLAR CELLS | 2012年 / 100卷

基金：

中国国家自然科学基金;

关键词：

Optical microcavity; ITO-free; Polymer solar cells;

D O I：

10.1016/j.solmat.2012.01.021

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 fabricate ITO-free bulk-heterojunction polymer solar cells (PSCs) with the structure glass/WO3/Ag/WO3/P3HT:PCBM/LiF/Al. According to the J-V characterization, the device efficiency is improved by 27.4% for the ITO-free device with a 70 nm-thick active layer but reduced by 19.9% for the device with a 150 nm-thick active layer, when compared with that of the PSC device with an ITO transparent electrode. Further investigation based on IPCE spectra test and transfer matrix simulations reveals that it is the optical resonance effect of the metal-mirror-microcavity (MMC) constructed between the semitransparent Ag electrode and top Al electrode that leads to the efficiency improvement for the device with 70 nm-thick active layer. Meanwhile, the efficiency reduction of the device with a 150 nm-thick active layer is caused by the off-resonance suppression of the MMC structure. It demonstrates that the MMC structure is an important element to be considered when the WO3/Ag/WO3 multilayer is used to substitute the ITO electrode as a transparent electrode of the PSC devices. (C) 2012 Elsevier B.V. All rights reserved.

引用

收藏

页码：226 / 230

页数：5

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