ABSTRACT

There is no clear data about the optimum thicknesses, band gaps, and charge densities of Cu₂O thin films to fabricate solar cells. Therefore, here, Solar Cell Capacitance Simulator (SCAPS) program was employed to simulate the Cu₂O nanostructures solar cells. Effect of window layer thickness, absorber layer thickness, bandgap, and carrier concentration on basic parameters of Cu₂O solar cells were studied. Results revealed that window layer thickness in range from 0.3 to 0.4 µm is optimum to produce a higher performance of about 6.5%. Bandgap should be greater than 2.1 eV and donor carrier concentration under 1×10¹⁶ cm^-3 are required to improve solar cell efficiency of about 8%. Built-in potential, width of the depletion layer, collection length of charge carrier, lifetime of minority carrier, and recombination rate are the main factors directing performance of devices. Consequently, employing our results to fabricate Cu₂O solar cells is a step forward to improve efficiencies.

摘要

没有关于制造太阳能电池的 Cu ₂ O 薄膜的最佳厚度、带隙和电荷密度的明确数据。因此，这里采用太阳能电池电容模拟器 (SCAPS) 程序来模拟 Cu ₂ O 纳米结构太阳能电池。研究了窗口层厚度、吸收层厚度、带隙和载流子浓度对Cu ₂ O太阳能电池基本参数的影响。结果表明，0.3 至 0.4 µm 范围内的窗口层厚度是产生约 6.5% 更高性能的最佳选择。带隙应大于2.1 eV，供体载流子浓度低于1×10 ¹⁶  cm ^-3 需要将太阳能电池效率提高约 8%。内建电位、耗尽层宽度、载流子收集长度、少数载流子寿命和复合率是影响器件性能的主要因素。因此，利用我们的结果来制造 Cu ₂ O 太阳能电池是提高效率的一步。