Enhancing the phase stability of formamidinium lead triiodide by addition of calcium chloride

Jin Hyuck Heo; Nang Mya Su Aung; Seok Yeong Hong; Bum Jun Park; Sang Hyuk Im

doi:10.1149/2162-8777/ac19c4

Enhancing the phase stability of formamidinium lead triiodide by addition of calcium chloride

Jin Hyuck Heo, Nang Mya Su Aung, Seok Yeong Hong, Bum Jun Park, Sang Hyuk Im

Department of Chemical and Biological Engineering

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

Formamidinium lead triiodide (FAPbI₃) with stable black perovskite phase and without significantly changing its bandgap is demonstrated by the incorporation of CaCl₂. More incorporated CaCl₂ in FAPbI₃ creates a desirable crystal structure, satisfying the Goldschmidt tolerance factor, and thereby stabilizing black perovskite phase under ambient conditions. However, more incorporated CaCl₂ in FAPbI₃ is likely to degrade the perovskite due to its hygroscopic characteristics. In addition, the incorporated CaCl₂ in FAPbI₃ solution reduces solubility, causing the formation of smaller crystal grains and pinholes due to quick precipitation during the non-solvent dripping crystallization process. Accordingly, 5 % CaCl₂ incorporated FAPbI₃ films have the best phase stability and solar cell performance with 18.0 % of power conversion efficiency at 1 sun condition.

Original language	English
Article number	085002
Journal	ECS Journal of Solid State Science and Technology
Volume	10
Issue number	8
DOIs	https://doi.org/10.1149/2162-8777/ac19c4
Publication status	Published - 2021

Bibliographical note

Funding Information:
This study was supported by the National Research Foundation of Korea (NRF) under the Ministry of Science, ICT & Future Planning (Basic Science Research Program (No. 2021R1A5A6002853), Nano-Material Technology Development Program (No. 2017M3A7B4041696)) and the Ministry of Trade, Industry and Energy, Republic of Korea (New & Renewable Energy Core Technology Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) (No. 20183010013820)).

Publisher Copyright:
© 2021 The Electrochemical Society (“ECS”).

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials

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10.1149/2162-8777/ac19c4

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title = "Enhancing the phase stability of formamidinium lead triiodide by addition of calcium chloride",

abstract = "Formamidinium lead triiodide (FAPbI3) with stable black perovskite phase and without significantly changing its bandgap is demonstrated by the incorporation of CaCl2. More incorporated CaCl2 in FAPbI3 creates a desirable crystal structure, satisfying the Goldschmidt tolerance factor, and thereby stabilizing black perovskite phase under ambient conditions. However, more incorporated CaCl2 in FAPbI3 is likely to degrade the perovskite due to its hygroscopic characteristics. In addition, the incorporated CaCl2 in FAPbI3 solution reduces solubility, causing the formation of smaller crystal grains and pinholes due to quick precipitation during the non-solvent dripping crystallization process. Accordingly, 5 % CaCl2 incorporated FAPbI3 films have the best phase stability and solar cell performance with 18.0 % of power conversion efficiency at 1 sun condition.",

author = "Heo, {Jin Hyuck} and Aung, {Nang Mya Su} and Hong, {Seok Yeong} and Park, {Bum Jun} and Im, {Sang Hyuk}",

note = "Funding Information: This study was supported by the National Research Foundation of Korea (NRF) under the Ministry of Science, ICT & Future Planning (Basic Science Research Program (No. 2021R1A5A6002853), Nano-Material Technology Development Program (No. 2017M3A7B4041696)) and the Ministry of Trade, Industry and Energy, Republic of Korea (New & Renewable Energy Core Technology Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) (No. 20183010013820)). Publisher Copyright: {\textcopyright} 2021 The Electrochemical Society (“ECS”).",

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doi = "10.1149/2162-8777/ac19c4",

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T1 - Enhancing the phase stability of formamidinium lead triiodide by addition of calcium chloride

AU - Heo, Jin Hyuck

AU - Aung, Nang Mya Su

AU - Hong, Seok Yeong

AU - Park, Bum Jun

AU - Im, Sang Hyuk

N1 - Funding Information: This study was supported by the National Research Foundation of Korea (NRF) under the Ministry of Science, ICT & Future Planning (Basic Science Research Program (No. 2021R1A5A6002853), Nano-Material Technology Development Program (No. 2017M3A7B4041696)) and the Ministry of Trade, Industry and Energy, Republic of Korea (New & Renewable Energy Core Technology Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) (No. 20183010013820)). Publisher Copyright: © 2021 The Electrochemical Society (“ECS”).

PY - 2021

Y1 - 2021

N2 - Formamidinium lead triiodide (FAPbI3) with stable black perovskite phase and without significantly changing its bandgap is demonstrated by the incorporation of CaCl2. More incorporated CaCl2 in FAPbI3 creates a desirable crystal structure, satisfying the Goldschmidt tolerance factor, and thereby stabilizing black perovskite phase under ambient conditions. However, more incorporated CaCl2 in FAPbI3 is likely to degrade the perovskite due to its hygroscopic characteristics. In addition, the incorporated CaCl2 in FAPbI3 solution reduces solubility, causing the formation of smaller crystal grains and pinholes due to quick precipitation during the non-solvent dripping crystallization process. Accordingly, 5 % CaCl2 incorporated FAPbI3 films have the best phase stability and solar cell performance with 18.0 % of power conversion efficiency at 1 sun condition.

AB - Formamidinium lead triiodide (FAPbI3) with stable black perovskite phase and without significantly changing its bandgap is demonstrated by the incorporation of CaCl2. More incorporated CaCl2 in FAPbI3 creates a desirable crystal structure, satisfying the Goldschmidt tolerance factor, and thereby stabilizing black perovskite phase under ambient conditions. However, more incorporated CaCl2 in FAPbI3 is likely to degrade the perovskite due to its hygroscopic characteristics. In addition, the incorporated CaCl2 in FAPbI3 solution reduces solubility, causing the formation of smaller crystal grains and pinholes due to quick precipitation during the non-solvent dripping crystallization process. Accordingly, 5 % CaCl2 incorporated FAPbI3 films have the best phase stability and solar cell performance with 18.0 % of power conversion efficiency at 1 sun condition.

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Enhancing the phase stability of formamidinium lead triiodide by addition of calcium chloride

Abstract

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