23.7% Efficient inverted perovskite solar cells by dual interfacial modification

作者：Matteo Degani, Qingzhi An, Miguel Albaladejo‐Siguan, Yvonne J. Hofstetter, Changsoon Cho, Fabian Paulus, Giulia Grancini, Yana Vaynzof · 发表于：Science Advances · 年份：2021 · DOI：10.1126/sciadv.abj7930 · 被引用次数：448 · 研究领域：Perovskite Materials and Applications、Quantum Dots Synthesis And Properties、Conducting polymers and applications

Despite remarkable progress, the performance of lead halide perovskite solar cells fabricated in an inverted structure lags behind that of standard architecture devices. Here, we report on a dual interfacial modification approach based on the incorporation of large organic cations at both the bottom and top interfaces of the perovskite active layer. Together, this leads to a simultaneous improvement in both the open-circuit voltage and fill factor of the devices, reaching maximum values of 1.184 V and 85%, respectively, resulting in a champion device efficiency of 23.7%. This dual interfacial modification is fully compatible with a bulk modification of the perovskite active layer by ionic liquids, leading to both efficient and stable inverted architecture devices.