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How antisolvent miscibility affects perovskite film wrinkling and photovoltaic properties

Title data

Kim, Seul-Gi ; Kim, Jeong-Hyeon ; Ramming, Philipp ; Zhong, Yu ; Schötz, Konstantin ; Kwon, Seok Joon ; Hüttner, Sven ; Panzer, Fabian ; Park, Nam-Gyu:
How antisolvent miscibility affects perovskite film wrinkling and photovoltaic properties.
In: Nature Communications. Vol. 12 (10 March 2021) Issue 1 . - Art.Nr. 1554.
ISSN 2041-1723
DOI: https://doi.org/10.1038/s41467-021-21803-2

Official URL: Volltext

Abstract in another language

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.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Experimental Physics II - Optoelectronics of Soft Matter
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Experimental Physics II - Optoelectronics of Soft Matter > Chair Experimental Physics II - Optoelectronics of Soft Matter - Univ.-Prof. Dr. Anna Köhler
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 530 Physics
Date Deposited: 12 Mar 2021 07:42
Last Modified: 12 Mar 2021 07:42
URI: https://eref.uni-bayreuth.de/id/eprint/63884