Abstract

In the present paper, a Pb-free and eco-friendly perovskite solar cell (PSC) with a new structure of glass|TCO|TiO₂|CZTSe_{1 – x}S_x|CH₃NH₃SnI₃|back contact has been modeled and simulated by SCAPS-1D package. To verify the simulation process, an experimental report on Pb-free PSC was simulated initially. Then, the costly Spiro-OMeTAD layer as the common hole-transport material (HTM) was eliminated. To overcome the possible deficiencies related to lacking of HTM plus management of the incident light, the economic and eco-friendly Cu₂ZnSn(Se_{1 – x}S_x)₄ (CZTSe_{1 – x}S_x) layer was added in the front of perovskite layer followed by optimizing the parameters. By optimization, the power-conversion efficiency of 17.57%, open-circuit voltage V_oc of 0.85 V, short-circuit current density J_sc of 29.22 mA/cm², and fill factor of 70.47% were obtained. Meanwhile, very high quantum efficiency was achieved in the visible region of spectrum.

中文翻译：

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高效环保钙钛矿-CZTSe 1 – x S x太阳能电池的建模与仿真

摘要

本文以玻璃| TCO | TiO ₂ | CZTSe _{1 – x} S _x | CH ₃ NH ₃ SnI ₃ |背接触的新结构为模型，对无铅环保型钙钛矿太阳能电池（PSC）进行了建模。并通过SCAPS-1D软件包进行仿真。为了验证仿真过程，最初对无铅PSC的实验报告进行了仿真。然后，取消了昂贵的Spiro-OMeTAD层作为常见的空穴传输材料（HTM）。为克服与缺少HTM以及对入射光进行管理有关的可能缺陷，经济且环保的Cu ₂ ZnSn（Se _{1 – x} S _x）₄（CZTSe 在钙钛矿层的前面添加_{1 – x} S _x）层，然后优化参数。通过优化，获得了17.57％的功率转换效率，0.85V的开路电压V _oc，29.22mA / cm ²的短路电流密度J _sc以及70.47％的填充系数。同时，在可见光谱范围内实现了很高的量子效率。