Fully-solution-processed organic solar cells with a highly efficient paper-based light trapping element
Fully-solution-processed organic solar cells with a highly efficient paper-based light trapping element
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DOI：
10.1039/c5ta07154b
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发表时间：
2015-12
影响因子：
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通讯作者：
Zheng Tang;A. Elfwing;A. Melianas;J. Bergqvist;Q. Bao;O. Inganäs
中科院分区：
文献类型：
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作者：
Zheng Tang;A. Elfwing;A. Melianas;J. Bergqvist;Q. Bao;O. Inganäs
We demonstrate the use of low cost paper as an efficient light-trapping element for thin film photovoltaics. We verify its use in fully-solution processed organic photovoltaic devices with the highest power conversion efficiency and the lowest internal electrical losses reported so far, the architecture of which – unlike most of the studied geometries to date – is suitable for upscaling, i.e. commercialization. The use of the paper-reflector enhances the external quantum efficiency (EQE) of the organic photovoltaic device by a factor of ≈1.5–2.5 over the solar spectrum, which rivals the light harvesting efficiency of a highly-reflective but also considerably more expensive silver mirror back-reflector. Moreover, by detailed theoretical and experimental analysis, we show that further improvements in the photovoltaic performance of organic solar cells employing PEDOT:PSS as both electrodes rely on the future development of high-conductivity and high-transmittance PEDOT:PSS. This is due optical losses in the PEDOT:PSS electrodes.
