High performance ambient-air-stable FAPbI3 perovskite solar cells with molecule-passivated Ruddlesden–Popper/3D heterostructured film

Tianqi Niu, Jing Lu, Ming-Chun Tang, Dounya Barrit, Detlef M. Smilgies, Zhou Yang, Jianbo Li, Yuanyuan Fan, Tao Luo, Iain McCulloch, Aram Amassian, Shengzhong Liu, Kui Zhao

Research output: Contribution to journalArticlepeer-review

118 Scopus citations

Abstract

Ambient stability remains a critical hurdle for commercialization of perovskite solar cells. Two-dimensional Ruddlesden-Popper (RP) perovskite solar cells exhibit excellent stability but suffer from low photovoltaic performance so far. Herein, a RP/3D heterostructure passivated by semiconducting molecules is reported, which systematically addresses both charge dynamics and degradation mechanisms in concert for cesium-free FAPbI solar cells, delivering a power-conversion efficiency as high as 20.62% and remarkable long-term ambient stability with a t lifetime exceeding 2880 hours without encapsulation. In situ characterizations were carried out to gain insight into structural evolution and crystal growth mechanisms during spin coating. Comprehensive film and device characterizations were performed to understand the influences of the RP perovskite and molecule passivation on the film quality, photovoltaic performance and degradation mechanisms. This enables fabrication of a superior quality film with significantly improved optoelectronic properties, which lead to higher charge collection efficiency. The underlying mitigated degradation mechanisms of the passivated RP/3D devices were further elucidated. The understanding of the necessity of addressing both the charge dynamics and degradation mechanisms of solar cells will guide the future design and fabrication of chemically stable, high-efficiency photovoltaic devices.
Original languageEnglish (US)
Pages (from-to)3358-3366
Number of pages9
JournalEnergy & Environmental Science
Volume11
Issue number12
DOIs
StatePublished - 2018

Fingerprint

Dive into the research topics of 'High performance ambient-air-stable FAPbI3 perovskite solar cells with molecule-passivated Ruddlesden–Popper/3D heterostructured film'. Together they form a unique fingerprint.

Cite this