Efficient solution-processed small-molecule solar cells with titanium suboxide as an electric adhesive layer

被引：8

作者：

Lee, Byoung Hoon ^{[1
]}

Coughlin, Jessica ^{[2
]}

Kim, Geunjin ^{[3
]}

Bazan, Guillermo C. ^{[2
]}

Lee, Kwanghee ^{[1
,3
]}

机构：

[1] Gwangju Inst Sci & Technol, Heeger Ctr Adv Mat, Res Inst Solar & Sustainable Energies, Kwangju 500712, South Korea

[2] Univ Calif Santa Barbara, Ctr Polymers & Organ Solids, Santa Barbara, CA 93106 USA

[3] Gwangju Inst Sci & Technol, Sch Mat Sci & Engn, Kwangju 500712, South Korea

来源：

APPLIED PHYSICS LETTERS | 2014年 / 104卷 / 21期

基金：

新加坡国家研究基金会;

关键词：

POWER CONVERSION EFFICIENCY; OPTICAL SPACER; PERFORMANCE; RECOMBINATION; INTERLAYER; VOLTAGE; UNIT;

D O I：

10.1063/1.4880095

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We demonstrate efficient and air-stable small-molecule bulk heterojunction (SM BHJ) solar cells by introducing titanium suboxide (TiOx) between the active layer and the cathode as an electric adhesive layer. The SM BHJ solar cell with the TiOx interlayer exhibits improved power conversion efficiency of 6.4% as well as greatly enhanced device lifetime. Analysis of the dark diode characteristics and comparison of the current density-voltage characteristics upon heat annealing indicate that the TiOx interlayer improves the electrical contact between the active layer and the cathode, thereby resulting in efficient sweep-out of photogenerated charge carriers. (C) 2014 AIP Publishing LLC.

引用

页数：5

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