Realization of efficient charge extraction at the cathode and anode interfaces is still one of the challenges for improving the power conversion efficiency (PCE) of the semitransparent perovskite solar cells (PSCs). In this work, we report our effort to enhance the PCE of semitransparent PSCs by incorporating a pair of an energetically favorable cathode buffer layer (CBL) and a hole-transporting layer (HTL). The effects of different CBLs, e.g., bathophenanthroline, bathocuproine, and perylene diimide, on charge extraction efficiency and PCE of the semitransparent PSCs are analyzed. Scanning electron microscopy reveal that UV-plasma treated poly(bis(4-phenyl) (2,4,6-trimethylphenyl) amine) (PTAA) HTL surface favors the growth of a uniform and dense functional CH₃NH₃(I_0.75Br_0.15)₃ perovskite layer across the substrate, with a low defect density for suppressing charge recombination loss. An average PCE of 13.53%% and 9.92% were obtained with combination of a BCP CBL and a PTAA HTL measured from the ITO side and Ag side, respectively. Semitransparent PSCs possess an encouraging large average open-circuit voltage of 1.13 V, and an average transparency of 21%. Achieving an efficient charge collection and retaining a high built-in potential across the CH₃NH₃(I_0.75Br_0.15)₃ photoactive layer via interfacial modifications are a prerequisite for attaining high-performance semitransparent PSCs.

在阴极和阳极界面实现有效的电荷提取仍然是提高半透明钙钛矿太阳能电池（PSC）的功率转换效率（PCE）的挑战之一。在这项工作中，我们报告了我们通过结合一对能量有利的阴极缓冲层（CBL）和空穴传输层（HTL）来提高半透明 PSC 的 PCE 的努力。分析了不同的 CBL，例如红菲咯啉、浴铜灵和苝二酰亚胺，对半透明 PSC 的电荷提取效率和 PCE 的影响。扫描电子显微镜显示，UV 等离子体处理的聚（双（4-苯基）（2,4,6-三甲基苯基）胺）（PTAA）HTL 表面有利于均匀致密的功能性 CH ₃ NH ₃ (I _0.75Br _0.15 ) ₃钙钛矿层横跨基板，具有低缺陷密度以抑制电荷复合损失。分别从 ITO 侧和 Ag 侧测量的 BCP CBL 和 PTAA HTL 的组合获得了 13.53% 和 9.92% 的平均 PCE。半透明 PSC 具有令人鼓舞的 1.13 V 大平均开路电压和 21% 的平均透明度。通过界面改性实现有效的电荷收集并保持跨 CH ₃ NH ₃ (I _0.75 Br _0.15 ) ₃光敏层的高内置电位是获得高性能半透明 PSC 的先决条件。