<br>基于二硫化钨（WS2）缓冲层的 CdTe 太阳能电池的综合光伏研究,Heliyon

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基于二硫化钨（WS2）缓冲层的 CdTe 太阳能电池的综合光伏研究
Heliyon ( IF 3.4 ) Pub Date : 2023-03-11 , DOI: 10.1016/j.heliyon.2023.e14438
E I Emon ₁ , A M Islam ₁ , M K Sobayel ₂ , S Islam ₃ , Md Akhtaruzzaman ₂ , N Amin ₄ , A Ahmed ₁ , M J Rashid _{1,

5}

Affiliation

过渡金属二硫属化物（TMCDs）-二硫化钨（WS2）表现出优异的光电性能，如合适的带隙、高吸收系数、良好的导电性、高载流子迁移率等，可用作薄膜太阳能电池的光伏材料。在本工作中，我们分别用无毒、地球丰富的 WS2 缓冲器和 SnO2 窗口层取代了 CdTe 太阳能电池中传统的缓冲 CdS 和 ITO/ZnO 窗口层。SCAPS-1D 太阳光模拟器用于研究 WS2 作为 CdTe 太阳能电池缓冲材料的潜力。这项数值研究比较了所提出的结构 SnO2/WS2/CdTe/Au 和基线结构 ITO/ZnO/CdS/CdTe/Au 之间的性能。还分析了载流子产生速率、光谱响应、电流-电压特性、体缺陷密度、缓冲器/吸收器界面缺陷密度、工作温度和电容-电压特性对太阳能电池性能参数的影响。WS2 块体和 WS2/CdTe 界面中缺陷密度的公差水平分别为 1017 cm-3 和 1012 cm-3。温度研究表明，所提出的电池结构稳健性和热稳定性较差。在优化的器件结构下，所提出的电池的转换效率为 20.55%。此外，这些发现可能为制造可行、环保且廉价的 CdTe 薄膜太阳能电池提供见解。

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A comprehensive photovoltaic study on tungsten disulfide (WS2) buffer layer based CdTe solar cell

Transition metal di-chalcogenides (TMCDs)-Tungsten disulfide (WS2) exhibit excellent optoelectronic properties such as suitable bandgap, high absorption coefficient, good conductivity, high carrier mobility, etc. to be used as a photovoltaic material for thin-film solar cells. In the present work, we have replaced the traditional buffer CdS and ITO/ZnO window layer in CdTe solar cells with the non-toxic, earth-abundant WS2 buffer and SnO2 window layer, respectively. The SCAPS-1D solar simulator is used to investigate the potentiality of WS2 as buffer material in CdTe solar cells. This numerical study provides a comparison of the performances between the proposed structure: SnO2/WS2/CdTe/Au and the baseline structure: ITO/ZnO/CdS/CdTe/Au. The impacts of the charge carrier generation rate, spectral response, current-voltage characteristics, bulk defect density, defect density at buffer/absorber interface, operating temperature, and capacitance-voltage characteristics on the solar cell performance parameters have also been analyzed. The tolerance level of defect density in WS2 bulk and WS2/CdTe interface are found to be 1017 cm−3 and 1012 cm−3, respectively. The temperature study reveals the poor structural robustness and thermal stability of the proposed cell. The conversion efficiency of the proposed cell has found to be 20.55% at the optimized device structure. Nevertheles, these findings may provide an insight to fabricate viable, environment friendly, and inexpensive CdTe thin-film solar cells.

更新日期：2023-03-11

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