Improving Thermal Stability of Perovskite Solar Cells by Suppressing Ion Migration Using Copolymer Grain Encapsulation
Abstract
Thermal stability of organic–inorganic hybrid perovskites (OIHPs) remains as one of the critical challenges against the stable operation of perovskite solar cells (PSCs) in direct sunlight with elevated temperatures. Here, we show that the addition of a polystyrene-co-polyacrylonitrile (SAN) copolymer can significantly enhance thermal stability of OIHPs and improve the stability of the corresponding PSCs by suppressing the migration of organic cations in OHIP. The methylammonium lead iodide (MAPI) with SAN incorporated within the perovskite layer featured a superior thermal stability compared to pure MAPI without SAN, only displaying an average of 5–15% decrease in PCE even after continuous thermal aging for 24 h at 100 °C. The secondary ion mass spectrometry revealed that the thermal degradation of the pure MAPI was largely associated with MA+ out-migration. Conducting atomic force microscopy analysis further indicated that the incorporated SAN led to a suppression of ionic currents present at the grain boundaries of the perovskite film, which was understood by high immiscibility between SAN and MA+ components as confirmed by the experimentally estimated Flory–Huggins parameter between them. This study newly identifies a potential of using polymer grain encapsulation for enhancing thermal stability of OIHPs and their solar cell performance by suppressing themore »
- Authors:
-
[1];
[1];
[1];
[1];
[4];
- Stony Brook Univ., NY (United States)
- City University of New York, NY (United States)
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Stony Brook Univ., NY (United States); Brookhaven National Lab. (BNL), Upton, NY (United States)
- Publication Date:
- Research Org.:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1830199
- Report Number(s):
- BNL-222375-2021-JAAM
Journal ID: ISSN 0897-4756
- Grant/Contract Number:
- SC0012704
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Chemistry of Materials
- Additional Journal Information:
- Journal Volume: 33; Journal Issue: 15; Journal ID: ISSN 0897-4756
- Publisher:
- American Chemical Society (ACS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; Thin films; Layers; Ions; Perovskites; Polymers
Citation Formats
Zhou, Yuchen, Yin, Yifan, Zuo, Xianghao, Wang, Likun, Li, Tai-De, Xue, Yuan, Subramanian, Ashwanth, Fang, Yiwei, Guo, Yichen, Yang, Zhenhua, Cotlet, Mircea, Nam, Chang-Yong, and Rafailovich, Miriam H. Improving Thermal Stability of Perovskite Solar Cells by Suppressing Ion Migration Using Copolymer Grain Encapsulation. United States: N. p., 2021.
Web. doi:10.1021/acs.chemmater.1c01675.
Zhou, Yuchen, Yin, Yifan, Zuo, Xianghao, Wang, Likun, Li, Tai-De, Xue, Yuan, Subramanian, Ashwanth, Fang, Yiwei, Guo, Yichen, Yang, Zhenhua, Cotlet, Mircea, Nam, Chang-Yong, & Rafailovich, Miriam H. Improving Thermal Stability of Perovskite Solar Cells by Suppressing Ion Migration Using Copolymer Grain Encapsulation. United States. https://doi.org/10.1021/acs.chemmater.1c01675
Zhou, Yuchen, Yin, Yifan, Zuo, Xianghao, Wang, Likun, Li, Tai-De, Xue, Yuan, Subramanian, Ashwanth, Fang, Yiwei, Guo, Yichen, Yang, Zhenhua, Cotlet, Mircea, Nam, Chang-Yong, and Rafailovich, Miriam H. Fri .
"Improving Thermal Stability of Perovskite Solar Cells by Suppressing Ion Migration Using Copolymer Grain Encapsulation". United States. https://doi.org/10.1021/acs.chemmater.1c01675. https://www.osti.gov/servlets/purl/1830199.
@article{osti_1830199,
title = {Improving Thermal Stability of Perovskite Solar Cells by Suppressing Ion Migration Using Copolymer Grain Encapsulation},
author = {Zhou, Yuchen and Yin, Yifan and Zuo, Xianghao and Wang, Likun and Li, Tai-De and Xue, Yuan and Subramanian, Ashwanth and Fang, Yiwei and Guo, Yichen and Yang, Zhenhua and Cotlet, Mircea and Nam, Chang-Yong and Rafailovich, Miriam H.},
abstractNote = {Thermal stability of organic–inorganic hybrid perovskites (OIHPs) remains as one of the critical challenges against the stable operation of perovskite solar cells (PSCs) in direct sunlight with elevated temperatures. Here, we show that the addition of a polystyrene-co-polyacrylonitrile (SAN) copolymer can significantly enhance thermal stability of OIHPs and improve the stability of the corresponding PSCs by suppressing the migration of organic cations in OHIP. The methylammonium lead iodide (MAPI) with SAN incorporated within the perovskite layer featured a superior thermal stability compared to pure MAPI without SAN, only displaying an average of 5–15% decrease in PCE even after continuous thermal aging for 24 h at 100 °C. The secondary ion mass spectrometry revealed that the thermal degradation of the pure MAPI was largely associated with MA+ out-migration. Conducting atomic force microscopy analysis further indicated that the incorporated SAN led to a suppression of ionic currents present at the grain boundaries of the perovskite film, which was understood by high immiscibility between SAN and MA+ components as confirmed by the experimentally estimated Flory–Huggins parameter between them. This study newly identifies a potential of using polymer grain encapsulation for enhancing thermal stability of OIHPs and their solar cell performance by suppressing the out-diffusion of cationic organic components.},
doi = {10.1021/acs.chemmater.1c01675},
journal = {Chemistry of Materials},
number = 15,
volume = 33,
place = {United States},
year = {Fri Jul 23 00:00:00 EDT 2021},
month = {Fri Jul 23 00:00:00 EDT 2021}
}
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