Observation of Nanoscale Morphological and Structural Degradation in Perovskite Solar Cells by In-Situ TEM
Abstract
The chemical stability of organometallic halide perovskites is a major barrier facing their application in the fast rising field of next generation photovoltaics. These materials were shown to undergo degradation due to the influence of heat or moisture, significantly limiting the lifetime of associated devices. To overcome this stability issue, a fundamental understanding of degradation mechanisms is of foremost importance. Here, high resolution in situ transmission electron microscopy and electron energy loss spectroscopy elemental mapping were applied to probe morphological and structural changes in perovskite films during controlled environmental exposure treatments. Both moisture and oxygen in ambient air are revealed to facilitate degradation in CH3NH3PbI3 perovskites through decomposition and oxidation pathways, respectively. In addition, even in moisture- and oxygen-free environment evident degradation could be induced by heating at the solar cell s real-field operating temperature and the degradation was found to originate from defect sites. These findings provide fundamental insight to prevent degradation of perovskite materials and associated devices for realistic applications.
- Authors:
-
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- (United States)
- Univ. of Tennessee, Knoxville, TN (United States)
- Publication Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1340439
- Grant/Contract Number:
- AC05-00OR22725
- Resource Type:
- Accepted Manuscript
- Journal Name:
- ACS Applied Materials and Interfaces
- Additional Journal Information:
- Journal Volume: 8; Journal Issue: 47; Journal ID: ISSN 1944-8244
- Publisher:
- American Chemical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 14 SOLAR ENERGY; 36 MATERIALS SCIENCE
Citation Formats
Yang, Bin, Dyck, Ondrej K., Univ. of Tennessee, Knoxville, TN, Ming, Wenmei, Du, Mao-Hua, Das, Sanjib, Rouleau, Christopher M., Duscher, Gerd, Geohegan, David B., and Xiao, Kai. Observation of Nanoscale Morphological and Structural Degradation in Perovskite Solar Cells by In-Situ TEM. United States: N. p., 2016.
Web. doi:10.1021/acsami.6b11341.
Yang, Bin, Dyck, Ondrej K., Univ. of Tennessee, Knoxville, TN, Ming, Wenmei, Du, Mao-Hua, Das, Sanjib, Rouleau, Christopher M., Duscher, Gerd, Geohegan, David B., & Xiao, Kai. Observation of Nanoscale Morphological and Structural Degradation in Perovskite Solar Cells by In-Situ TEM. United States. https://doi.org/10.1021/acsami.6b11341
Yang, Bin, Dyck, Ondrej K., Univ. of Tennessee, Knoxville, TN, Ming, Wenmei, Du, Mao-Hua, Das, Sanjib, Rouleau, Christopher M., Duscher, Gerd, Geohegan, David B., and Xiao, Kai. Fri .
"Observation of Nanoscale Morphological and Structural Degradation in Perovskite Solar Cells by In-Situ TEM". United States. https://doi.org/10.1021/acsami.6b11341. https://www.osti.gov/servlets/purl/1340439.
@article{osti_1340439,
title = {Observation of Nanoscale Morphological and Structural Degradation in Perovskite Solar Cells by In-Situ TEM},
author = {Yang, Bin and Dyck, Ondrej K. and Univ. of Tennessee, Knoxville, TN and Ming, Wenmei and Du, Mao-Hua and Das, Sanjib and Rouleau, Christopher M. and Duscher, Gerd and Geohegan, David B. and Xiao, Kai},
abstractNote = {The chemical stability of organometallic halide perovskites is a major barrier facing their application in the fast rising field of next generation photovoltaics. These materials were shown to undergo degradation due to the influence of heat or moisture, significantly limiting the lifetime of associated devices. To overcome this stability issue, a fundamental understanding of degradation mechanisms is of foremost importance. Here, high resolution in situ transmission electron microscopy and electron energy loss spectroscopy elemental mapping were applied to probe morphological and structural changes in perovskite films during controlled environmental exposure treatments. Both moisture and oxygen in ambient air are revealed to facilitate degradation in CH3NH3PbI3 perovskites through decomposition and oxidation pathways, respectively. In addition, even in moisture- and oxygen-free environment evident degradation could be induced by heating at the solar cell s real-field operating temperature and the degradation was found to originate from defect sites. These findings provide fundamental insight to prevent degradation of perovskite materials and associated devices for realistic applications.},
doi = {10.1021/acsami.6b11341},
journal = {ACS Applied Materials and Interfaces},
number = 47,
volume = 8,
place = {United States},
year = {Fri Nov 04 00:00:00 EDT 2016},
month = {Fri Nov 04 00:00:00 EDT 2016}
}
Web of Science
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