Lee, Chanyong Chae, Kyungjin Ko, Yohan Lee, Changhyun Kim, Taemin Park, Seaeun Jung, Moo Young Kim, Jinhyoung Yun, Yong Ju Lee, Minoh Jun, Yongseok 2024-01-19T08:04:28Z 2024-01-19T08:04:28Z 2023-12-21 2023-11 1944-8244 https://pubs.kist.re.kr/handle/201004/113101 The cesium lead iodide (CsPbI3) perovskite solar cell possesses a wide band gap ranging from 1.65 to 1.75 eV, which is suitable for integration into a tandem structure along with a low-band-gap silicon solar cell. Moreover, CsPbI(3 )has received considerable attention as a potential solution for the prevalent issues of low thermal stability of organic-inorganic perovskite solar cells and phase segregation encountered in conventional mixed halide wide-band-gap perovskite solar cells. Through the implementation of volatile additives, CsPbI3 has demonstrated substantial advancements in efficiency, process temperature, and stability. This study introduces a novel approach for barium (Ba)-doping by spraying an antisolvent containing barium bis-(trifluoromethanesulfonimide) during the spin-coating process. By incorporating Ba2+ through this spraying technique, the formation of the delta phase in CsPbI3 is significantly suppressed; thereby, a power conversion efficiency of 18.56% is achieved, and a remarkable 93% of the initial efficiency is maintained after 600 h. English American Chemical Society Phase Stability Improvement of a γ-CsPbI3 Perovskite Solar Cell Utilizing a Barium Bis(trifluoromethanesulfonimide) Solution Article 10.1021/acsami.3c10668 1 ACS Applied Materials & Interfaces, v.15, no.44, pp.51050 - 51058 ACS Applied Materials & Interfaces 15 44 51050 51058 N scie scopus 001102160800001 2-s2.0-85176495393 Nanoscience & Nanotechnology Materials Science, Multidisciplinary Science & Technology - Other Topics Materials Science Article LEAD HALIDE PEROVSKITES EFFICIENT ALPHA-CSPBI3 DEGRADATION inorganic perovskite solar cell gamma-CsPbI3 phase stability Ba-doping doping viaantisolvent