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

Journal Article · · MRS Advances
DOI:https://doi.org/10.1557/adv.2017.423· OSTI ID:1422875
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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.

Research Organization:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
DOE Contract Number:
AC36-08GO28308
OSTI ID:
1422875
Report Number(s):
NREL/JA-5900-70993; applab
Journal Information:
MRS Advances, Vol. 2, Issue 53; ISSN 2059-8521
Publisher:
Materials Research Society (MRS)
Country of Publication:
United States
Language:
English

References (15)

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Temperature-Dependent Charge-Carrier Dynamics in CH 3 NH 3 PbI 3 Perovskite Thin Films journal September 2015
Recent progress on stability issues of organic–inorganic hybrid lead perovskite-based solar cells journal January 2016
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The Effects of the Organic–Inorganic Interactions on the Thermal Transport Properties of CH 3 NH 3 PbI 3 journal March 2016
Structural and optical properties of methylammonium lead iodide across the tetragonal to cubic phase transition: implications for perovskite solar cells journal January 2016
Grain boundary dominated ion migration in polycrystalline organic–inorganic halide perovskite films journal January 2016
Mesoporous scaffolds based on TiO 2 nanorods and nanoparticles for efficient hybrid perovskite solar cells journal January 2015
Ionic polarization-induced current–voltage hysteresis in CH3NH3PbX3 perovskite solar cells journal February 2016
Ionic and Optical Properties of Methylammonium Lead Iodide Perovskite across the Tetragonal-Cubic Structural Phase Transition journal September 2016
Polarization and Dielectric Study of Methylammonium Lead Iodide Thin Film to Reveal its Nonferroelectric Nature under Solar Cell Operating Conditions journal May 2016
Ultrafast ion migration in hybrid perovskite polycrystalline thin films under light and suppression in single crystals journal January 2016
Kinetics of Ion Transport in Perovskite Active Layers and Its Implications for Active Layer Stability journal September 2015
The Significance of Ion Conduction in a Hybrid Organic-Inorganic Lead-Iodide-Based Perovskite Photosensitizer journal May 2015

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Related Subjects

14 SOLAR ENERGY
36 MATERIALS SCIENCE
perovskite solar cells
phase transition
methylammonium lead iodide