Indium Tin Oxide-Free Polymer Solar Cells: Microcavity Enhancing the Performance Using WO 3 /Au/WO 3 as Transparent Electrode
Indium Tin Oxide-Free Polymer Solar Cells: Microcavity Enhancing the Performance Using WO 3 /Au/WO 3 as Transparent Electrode
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DOI：
10.1109/led.2014.2357712
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发表时间：
2014-09
影响因子：
4.9
通讯作者：
Ping Shen;Liang Shen;Yongbing Long;Geheng Chen
中科院分区：
文献类型：
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作者：
Ping Shen;Liang Shen;Yongbing Long;Geheng Chen
近年来，由于铟锡氧化物（ITO）价格昂贵，无ITO的聚合物太阳能电池（PSC）受到越来越多的关注。本文制备并研究了玻璃/WO 3 /Au/WO 3 /聚（3-己基噻吩）：茚-C60双加合物（P3 HT：ICBA）/LiF/Al结构的无ITO的PSC，结果表明，有源层厚度为85 nm的无ITO器件的功率转换效率比ITO基的提高了21.2%.这种改善归因于Au阳极和顶部Al阴极之间微腔效应的一阶共振和近共振。入射光电子转换效率谱测试和基于传输矩阵法的光学模拟结果表明，微腔结构可以增强390-460 nm和510-660 nm两个离散波长范围内的光吸收。
Recently, indium tin oxide (ITO)-free polymer solar cells (PSCs) have attracted increasing attention due to expensive ITO price caused by rare and valuable element-indium. Here, we fabricated and investigated ITO-free PSCs with the structure of glass/WO 3 /Au/WO 3 /poly (3-hexylthiophene): indene-C 60 bisadduct (P3HT:ICBA)/LiF/Al. It is demonstrated that the power conversion efficiency of ITO-free devices with 85-nm-thick active layer is improved by 21.2% compared with that of ITO-based. The improvement is attributed to the first-order resonance and near-resonance of microcavity effect constructed between the Au anode and top Al cathode. The judgment is supported by the incident photon-to-electron conversion efficiency spectra test and optical simulation based on transfer matrix method, which reveal that the microcavity structure can enhance light absorption within two discrete wavelength ranges of 390-460 and 510-660 nm.