Perovskite solar cells are a cheap and futuristic option for catering the single cell efficiency limit. Organic and in-organic Perovskite materials (ABX₃) have excellent optical properties such as large absorption coefficient, tunable bandgap and solution based synthesis approach. This paper proposes a Perovskite solar cell with a power conversion efficiency (PCE) of 15.06%. The inorganic Cs₂TiI₆ double perovskite acts as an absorber layer with an optical band gap of 1.8 eV, CdTe as hole transport layer (HTL) and TiO₂ as electron transport layer (ETL). This simple cell architecture may help to study and optimize the device parameters. The thickness of absorber material, ETL, HTL, bandgap of absorber material, interface defect density and temperature strongly influence the PCE of the device. The optimized thickness values for maximum PCE value are observed to be 0.01 μm for ETL, 4.33 μm for absorber layer and 2.75 μm for HTL. The temperature range for optimal device performance is around 270–280 K. Solar capacitance simulator (SCAPS-1D) has been used for calculations. The focus of the paper is to propose an environmental friendly non-toxic perovskite solar cell and to investigate optimized current, voltage and PCE characteristics of the device.

钙钛矿太阳能电池是满足单电池效率极限的廉价且具有未来派的选择。有机和无机钙钛矿材料（ABX ₃）具有出色的光学特性，例如大的吸收系数，可调的带隙和基于溶液的合成方法。本文提出了一种功率转换效率（PCE）为15.06％的钙钛矿型太阳能电池。无机Cs ₂ TiI ₆双重钙钛矿用作光学带隙为1.8 eV的吸收层，CdTe作为空穴传输层（HTL），TiO ₂作为电子传输层（ETL）。这种简单的单元架构可能有助于研究和优化设备参数。吸收体材料的厚度，ETL，HTL，吸收体材料的带隙，界面缺陷密度和温度会严重影响器件的PCE。观察到最大PCE值的最佳厚度值对于ETL为0.01μm，对于吸收层为4.33μm，对于HTL为2.75μm。最佳器件性能的温度范围约为270–280K。已使用太阳能电容模拟器（SCAPS-1D）进行计算。本文的重点是提出一种环保的无毒钙钛矿太阳能电池，并研究该器件的最佳电流，电压和PCE特性。