Improving inorganic perovskite photovoltaic performance via organic cation addition for efficient solar energy utilization
- Authors
- Lee, Dong-Gun; Pandey, Padmini; Parida, Bhaskar; Ryu, Jun; Cho, SungWon; Kim, Jae-Kwang; Kang, Dong-Won
- Issue Date
- Oct-2022
- Publisher
- Elsevier Ltd
- Keywords
- Inorganic perovskite solar cell; Intermediate phase control; Phenylethylammonium; Sublimation
- Citation
- Energy, v.257
- Journal Title
- Energy
- Volume
- 257
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/60324
- DOI
- 10.1016/j.energy.2022.124640
- ISSN
- 0360-5442
1873-6785
- Abstract
- Organic cations help in executing better crystal growth of halide perovskites. Herein, we have realized improved all-inorganic cesium lead halide perovskite film quality with reduced pinholes and high crystallinity in phenylethylammonium (PEA+) assisted perovskite. Additionally, PEA+ cation acts as an additive to control intermediate perovskite phase and executes pure phase perovskite crystal growth as compared to MA+ and FA+ cations assisted perovskite films. X-ray photoelectron and UV–vis spectroscopy results revealed that adding PEA+ in the perovskite helps in almost uniform distribution of Br− ion after post-annealing process. Furthermore, depth profiling analysis reveals that PEA+ in the intermediate phase perovskite interacts more with the ZnO layer beneath perovskite, which helps in the fabrication of compact film. PEA+ sublimates after post-annealing treatment of 300 °C, as no evidence of PEA+ existence was found in characterizations for post-annealed perovskite films. This brings multiple benefits to inorganic mixed halide perovskite film formation. The best performing perovskite solar cell (PSC) exhibits a high conversion efficiency of 14.75% as well as enhanced stability of maintaining almost 83% of its initial efficiency for 400 h. Electrochemical impedance spectroscopy and space-charge-limited current results suggests reduced recombination loss and defect densities in PEA+ assisted PSC. © 2022 Elsevier Ltd
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