Improvement of the CIGS solar cell performance: structure based on a ZnS buffer layer
Improvement of the CIGS solar cell performance: structure based on a ZnS buffer layer
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CIGS太阳能电池性能的改进：基于ZnS缓冲层的结构
DOI：
10.1007/s11082-019-2000-z
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发表时间：
2019
影响因子：
3
通讯作者：
Mohamed Redha Serdouk
中科院分区：
文献类型：
--
作者：
S. Tobbeche;S. Kalache;M. Elbar;M. N. Kateb;Mohamed Redha Serdouk
基于Cu（In，Ga）Se 2（CIGS）的薄膜太阳能电池是当今最高效的薄膜太阳能电池。无毒、宽带隙的硫化锌（ZnS）是一种很有前途的CIGS基太阳能电池缓冲层材料，有望取代硫化镉（CdS）。在这项工作中，我们提出了一个CIGS为基础的太阳能电池与ZnS缓冲层的模拟研究，使用模拟器Silvaco阿特拉斯。我们的初步模拟显示，22.6%的CIGS太阳能电池的CdS缓冲层，这是报告和最高的实验结果相媲美的效率。然而，与ZnS缓冲层的CIGS太阳能电池的模拟效率高达23.54%。为了提高ZnS/CIGS太阳能电池的性能，优化了CIGS吸收层和ZnS缓冲层的厚度、受主和施主密度以及CBO等层参数对ZnS/CIGS太阳能电池光伏参数的影响。当ZnS缓冲层和CIGS吸收层的厚度分别为0.025 μm和4 μm，受体和供体密度分别为6 × 1017 cm − 3和1018 cm −3，CBO在-0.05至0.05 eV范围内时，可以实现27.33%的最高效率。本文的模拟结果有助于开发高转换效率、低成本的太阳能电池。
Cu(In,Ga)Se2(CIGS) based thin film solar cells are the most efficient thin-film solar cells today. The non-toxic and wide band-gap zinc sulphide (ZnS) is a promising material to replace the cadmium sulfide (CdS) as the buffer layer in CIGS based solar cells. In this work we present a simulation study of a CIGS based solar cell with a buffer layer of ZnS, using the simulator Silvaco-Atlas. Our primary simulation shows a 22.6% efficiency of the CIGS solar cell with the CdS buffer layer which is comparable to reported and highest experimental results. However, the simulated efficiency of the CIGS solar cell with the ZnS buffer layer as high as 23.54% was achieved. The effects of layer parameters like the thickness, the acceptor and donor densities of the CIGS absorber and ZnS buffer layers and the CBO on the photovoltaic parameters of the ZnS/CIGS solar cell are optimized in order to improve the performance of the ZnS/CIGS solar cell. The highest efficiency of 27.33% is achieved when the ZnS buffer and the CIGS absorber layers have thicknesses of 0.025 µm and 4 µm with acceptor and donor densities of 6 × 1017cm−3and 1018cm−3, respectively and a CBO in the range − 0.05 to 0.05 eV. The present results of simulation can help the development of the solar cells with higher conversion efficiency and low cost.