Multifunctional Hybrid Interfacial Layers for High-Performance Inverted Perovskite Solar Cells.

Challenges remain hindering the performance and stability of inverted perovskite solar cells (PSCs), particularly for the nonstable interface between lead halide perovskite and charge extraction metal oxide layer. Herein, we report a simple yet scalable interfacial strategy to facilitate the assemble of high-performance inverted PSCs and scale-up modules. The hybrid interfacial layer containing self-assembly triphenylamine and conjugated poly(arylamine) simultaneously improves the chemical stability, charge extraction and energy level alignment of hole-selective interface, meanwhile promoting perovskite crystallization. Consequently, the correspondent inverted PSCs and modules achieved remarkable power conversion efficiencies (PCEs) of 24.5% and 20.7% (aperture area of 19.4 cm 2 ), respectively. The PSCs maintained over 80% of its initial efficiency under one-sun equivalent illumination of 1200 hours. This strategy is also effective to perovskite with various bandgaps, demonstrating the highest PCE of 19.6% for the 1.76-eV bandgap PSCs. Overall, this work provides a simple yet scalable interfacial strategy for obtaining state-of-the-art inverted PSCs and modules. This article is protected by copyright. All rights reserved.