Efficient Polymer Solar Cells with Surface Relief Gratings Fabricated by Simple Soft Lithography

被引：225

作者：

Na, Seok-In ^{[1
]}

Kim, Seok-Soon ^{[2
]}

Jo, Jang ^{[1
]}

Oh, Seung-Hwan ^{[1
]}

Kim, Juhwan ^{[1
]}

Kim, Dong-Yu ^{[1
]}

机构：

[1] Gwangju Inst Sci & Technol, Dept Mat Sci & Engn, Heeger Ctr Adv Mat, Kwangju 500712, South Korea

[2] Kunsan Natl Univ, Sch Chem Engn & Mat Sci, Kunsan 573701, Chonbuk, South Korea

来源：

ADVANCED FUNCTIONAL MATERIALS | 2008年 / 18卷 / 24期

关键词：

D O I：

10.1002/adfm.200800683

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Polymer-based photovoltaic cells, with periodic sub-micrometer structures as an efficient light-trapping scheme, are investigated to improve the performance of organic solar cells based on poly(3-hexylthiophene) and 1-(3-methoxycarbonyl)propyl-1-phenyl-(6,6)C-61. A soft lithographic approach that uses photoresponsive azo polymer films as masters and poly(dimethylsiloxane) as stamps is used to form surface relief gratings (SRGs) on the active layers. The effect of periodic gratings on solar cell performance is precisely investigated according to various grating conditions such as period, depth, and dimension. The solar cells with 1D and 2D SRGs present improved incident-photon-to-current conversion efficiencies and an overall increase in power conversion efficiencies, primarily resulting from the enhancement of short-circuit current density, indicating that periodic structures induce further photon absorption in the active film.

引用

页码：3956 / 3963

页数：8

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