How antisolvent miscibility affects perovskite film wrinkling and photovoltaic properties
Seul-Gi Kim,
Jeong-Hyeon Kim,
Philipp Ramming,
Yu Zhong,
Konstantin Schötz,
Seok Joon Kwon,
Sven Huettner,
Fabian Panzer and
Nam-Gyu Park ()
Additional contact information
Seul-Gi Kim: Sungkyunkwan University (SKKU)
Jeong-Hyeon Kim: Sungkyunkwan University (SKKU)
Philipp Ramming: University of Bayreuth
Yu Zhong: University of Bayreuth
Konstantin Schötz: University of Bayreuth
Seok Joon Kwon: Sungkyunkwan University (SKKU)
Sven Huettner: University of Bayreuth
Fabian Panzer: University of Bayreuth
Nam-Gyu Park: Sungkyunkwan University (SKKU)
Nature Communications, 2021, vol. 12, issue 1, 1-10
Abstract:
Abstract Charge carriers’ density, their lifetime, mobility, and the existence of trap states are strongly affected by the microscopic morphologies of perovskite films, and have a direct influence on the photovoltaic performance. Here, we report on micro-wrinkled perovskite layers to enhance photocarrier transport performances. By utilizing temperature-dependent miscibility of dimethyl sulfoxide with diethyl ether, the geometry of the microscopic wrinkles of the perovskite films are controlled. Wrinkling is pronounced as temperature of diethyl ether (TDE) decreases due to the compressive stress relaxation of the thin rigid film-capped viscoelastic layer. Time-correlated single-photon counting reveals longer carrier lifetime at the hill sites than at the valley sites. The wrinkled morphology formed at TDE = 5 °C shows higher power conversion efficiency (PCE) and better stability than the flat one formed at TDE = 30 °C. Interfacial and additive engineering improve further PCE to 23.02%. This study provides important insight into correlation between lattice strain and carrier properties in perovskite photovoltaics.
Date: 2021
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Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-21803-2
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DOI: 10.1038/s41467-021-21803-2
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