Linked Nickel Oxide/Perovskite Interface Passivation for High?Performance Textured Monolithic Tandem Solar Cells

Sputtered nickel oxide (NiOx) is an attractive hole-transport layer for efficient, stable, and large-area p-i-n metal-halide perovskite solar cells (PSCs). However, surface traps undesirable chemical reactions at the NiOx/perovskite interface are limiting performance of NiOx-based PSCs. To address these issues simultaneously, efficient passivation strategy by using organometallic dye molecule (N719) reported. This concurrently passivates NiOx traps, facilitates charge transport. Consequently, power conversion efficiency (PCE) single-junction PSCs increases from 17.3% to 20.4% (the highest reported value sputtered-NiOx based PSCs). Notably, N719 self-anchors conformally covers films deposited on complex surfaces. enables highly textured monolithic perovskite/silicon tandem cells, reaching PCEs up 26.2% (23.5% without passivation) with a high processing yield. The also forms barrier that prevents interface, significantly improving device stability. These findings provide critical insights improved fabrication robust, perovskite-based optoelectronic devices.