Efficient Polymer Solar Cells with Surface Relief Gratings Fabricated by Simple Soft Lithography
Efficient Polymer Solar Cells with Surface Relief Gratings Fabricated by Simple Soft Lithography
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DOI：
10.1002/adfm.200800683
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发表时间：
2008-12-22
影响因子：
19
通讯作者：
Kim, Dong-Yu
中科院分区：
文献类型：
--
作者：
Na, Seok-In;Kim, Seok-Soon;Kim, Dong-Yu
研究了以聚（3-己基噻吩）和1-（3-甲氧羰基）丙基-1-苯基-（6，6）C-61为基的聚合物光伏电池，并将其与周期性亚微米结构作为一种有效的光捕获方案，以提高有机太阳能电池的性能。一个软光刻的方法，使用光敏偶氮聚合物薄膜作为母版和聚（二甲基硅氧烷）作为邮票是用来形成表面浮雕光栅（SRG）的有源层。根据不同的光栅条件，如周期，深度和尺寸的周期光栅对太阳能电池性能的影响进行了精确的研究。具有1D和2D SRG的太阳能电池呈现出改善的入射光子-电流转换效率和功率转换效率的总体增加，这主要是由于短路电流密度的增强，表明周期性结构在活性膜中诱导进一步的光子吸收。
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.