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Title: Hybrid Perovskite Phase Transition and Its Ionic, Electrical and Optical Properties

Abstract

Hybrid perovskite solar cells (PSCs) under normal operation will reach a temperature above ~ 60 °C, across the tetragonal-cubic structural phase transition of methylammonium lead iodide (MAPbI 3). Whether the structural phase transition could result in dramatic changes of ionic, electrical and optical properties that may further impact the PSC performances should be studied. Herein, we report a structural phase transition temperature of MAPbI 3thin film at ~ 55 °C, but a striking contrast occurred at ~ 45 °C in the ionic and electrical properties of MAPbI 3due to a change of the ion activation energy from 0.7 eV to 0.5 eV. The optical properties exhibited no sharp transition except for the steady increase of the bandgap with temperature. It was also observed that the activation energy for ionic migration steadily increased with increased grain sizes, and reduction of the grain boundary density reduced the ionic migration.

Authors:
; ; ;
Publication Date:
Research Org.:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
OSTI Identifier:
1422875
Report Number(s):
NREL/JA-5900-70993
Journal ID: ISSN 2059-8521; applab
DOE Contract Number:  
AC36-08GO28308
Resource Type:
Journal Article
Journal Name:
MRS Advances
Additional Journal Information:
Journal Volume: 2; Journal Issue: 53; Journal ID: ISSN 2059-8521
Publisher:
Materials Research Society (MRS)
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; 36 MATERIALS SCIENCE; perovskite solar cells; phase transition; methylammonium lead iodide

Citation Formats

Hoque, Md Nadim Ferdous, Islam, Nazifah, Zhu, Kai, and Fan, Zhaoyang. Hybrid Perovskite Phase Transition and Its Ionic, Electrical and Optical Properties. United States: N. p., 2017. Web. doi:10.1557/adv.2017.423.
Hoque, Md Nadim Ferdous, Islam, Nazifah, Zhu, Kai, & Fan, Zhaoyang. Hybrid Perovskite Phase Transition and Its Ionic, Electrical and Optical Properties. United States. doi:10.1557/adv.2017.423.
Hoque, Md Nadim Ferdous, Islam, Nazifah, Zhu, Kai, and Fan, Zhaoyang. Sun . "Hybrid Perovskite Phase Transition and Its Ionic, Electrical and Optical Properties". United States. doi:10.1557/adv.2017.423.
@article{osti_1422875,
title = {Hybrid Perovskite Phase Transition and Its Ionic, Electrical and Optical Properties},
author = {Hoque, Md Nadim Ferdous and Islam, Nazifah and Zhu, Kai and Fan, Zhaoyang},
abstractNote = {Hybrid perovskite solar cells (PSCs) under normal operation will reach a temperature above ~ 60 °C, across the tetragonal-cubic structural phase transition of methylammonium lead iodide (MAPbI3). Whether the structural phase transition could result in dramatic changes of ionic, electrical and optical properties that may further impact the PSC performances should be studied. Herein, we report a structural phase transition temperature of MAPbI3thin film at ~ 55 °C, but a striking contrast occurred at ~ 45 °C in the ionic and electrical properties of MAPbI3due to a change of the ion activation energy from 0.7 eV to 0.5 eV. The optical properties exhibited no sharp transition except for the steady increase of the bandgap with temperature. It was also observed that the activation energy for ionic migration steadily increased with increased grain sizes, and reduction of the grain boundary density reduced the ionic migration.},
doi = {10.1557/adv.2017.423},
journal = {MRS Advances},
issn = {2059-8521},
number = 53,
volume = 2,
place = {United States},
year = {2017},
month = {1}
}

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