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An improved design approach for thin film solar cells

机译:薄膜太阳能电池的改进设计方法

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摘要

In this paper an improved design for thin film solar cells is proposed to enhance conversion efficiency. This proposed structure includes two pairs of additional contact to the reversed bias of absorber and buffer layers, directly. The purpose of additional electrodes is to control the carrier distribution in the active region of device. This idea has been implemented on the fabricated Copper indium gallium selenide solar cell with the record efficiency of 22%. The simulations show an improvement of 2% in the conversion efficiency is obtained by direct application of reverse biasing on the absorber and buffer layer. The increase of short circuit current more than 3 mA/cm(2) is responsible for the improved performance. The open circuit voltage and fill factor of cell can also be increased by the controlling reverse bias.
机译:在本文中,提出了一种改进的薄膜太阳能电池设计,以提高转换效率。所提出的结构包括两对直接接触吸收层和缓冲层反向偏压的附加触点。附加电极的目的是控制器件有源区中的载流子分布。这个想法已经在制造的铜铟镓硒化太阳能电池上实现,效率达到了创纪录的22%。仿真表明,通过在吸收层和缓冲层上直接施加反向偏压,可以将转换效率提高2%。短路电流的增加超过3 mA / cm(2)有助于提高性能。电池的开路电压和填充系数也可以通过控制反向偏置来增加。

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