85 °C/85%-Stable n-i-p Perovskite Photovoltaics with NiO_x Hole Transport Layers Promoted By Perovskite Quantum Dots.

ABSTRACT: Power conversion efficiency (PCE) and long-term stability are two vital issues for perovskite solar cells (PSCs). However, there is still a lack of suitable hole transport layers (HTLs) to endow PSCs with both high efficiency and stability. Here, NiO_x nanoparticles are promoted as an efficient and 85 °C/85%-stable inorganic HTL for high-performance n-i-p PSCs, with the introduction of perovskite quantum dots (QDs) between perovskite and NiO_x as systematic interfacial engineering. The QD intercalation enhances film morphology and assembly regulation of NiO_x HTLs . Due to structure-function correlations, hole mobility within NiO_x HTL is improved. And the hole extraction from perovskite to NiO_x is also facilitated, resulting from reduced trap states and optimized energy level alignments. Hence, the promoted NiO_x -based n-i-p PSCs exhibit high PCE (21.59%) and excellent stability (sustaining 85 °C aging in air without encapsulation). Furthermore, encapsulated solar modules with QDs-promoted NiO_x HTLs show impressive stability during 85 °C/85% aging test for 1000 hours. With high transparency, QDs-promoted NiO_x is also demonstrated to be an advanced HTL for semitransparent PSCs. This work develops promising NiO_x inorganic HTL in n-i-p PSCs for manufacturing next-generation photovoltaic devices.

SUBMITTER: Cheng F 

PROVIDER: S-EPMC9475515 | biostudies-literature | 2022 Sep

REPOSITORIES: biostudies-literature