Application of a low-cost and efficient p-type inorganic hole-transporting material, copper thiocyanate (CuSCN), on mesoporous n-i-p-configurated perovskite-based devices was conducted in this study. Diethylsulfide was chosen for the preparation of precursor solution in order to deposit CuSCN layer on perovskite without degrading it. Topographical, elemental, and electrical characterizations of spin-coated CuSCN layers were performed using XRD, AFM, SEM, XPS, UPS, and UV-Vis studies. A power conversion efficiency exceeding 11.02% with an open-circuit voltage of 0.83 V was succeeded in the perovskite solar cells under full sun illumination. Low-temperature solution process used for the deposition of CuSCN and a fast solvent removal method allowed the creation of compact, highly conformal CuSCN layers that facilitate rapid carrier extraction and collection. The differences in series and recombination resistances for CuSCN-free and CuSCN-containing cells were also determined using impedance spectroscopy (IS) analysis. Moreover, the effect of TiO₂ layer thickness on the cell performance was studied where these TiO₂ layers were used not only for electron extraction and transportation, but also as hole blocking layer in perovskite solar cells. The impedance spectroscopy results were also consistent with the differently configurated cell performances. This work shows a well-defined n-i-p perovskite cell with optimized layers which utilize low-cost and abundant materials for photovoltaic applications.

本研究进行了低成本，高效的p型无机空穴传输材料硫氰酸铜（CuSCN）在介孔压区配置的钙钛矿基器件上的应用。选择二乙基硫用于制备前体溶液，以便在钙钛矿上沉积CuSCN层而不降解。使用XRD，AFM，SEM，XPS，UPS和UV-Vis研究完成了旋涂CuSCN层的形貌，元素和电学表征。在充满阳光的情况下，钙钛矿型太阳能电池成功实现了超过11.02％的功率转换效率和0.83 V的开路电压。用于沉积CuSCN的低温溶液工艺和快速去除溶剂的方法可以产生致密的，高度保形的CuSCN层，有助于快速提取和收集载流子。还使用阻抗谱（IS）分析确定了无CuSCN和含CuSCN的电池在串联电阻和重组电阻上的差异。而且，TiO的作用_研究了2层厚度对电池性能的影响，其中这些TiO ₂层不仅用于电子提取和传输，还用作钙钛矿型太阳能电池的空穴阻挡层。阻抗谱结果也与不同配置的电池性能一致。这项工作显示了具有优化层的定义明确的压区钙钛矿电池，该层利用低成本和丰富的材料用于光伏应用。