Local Crystal Misorientation Influences Non-radiative Recombination in Halide Perovskites
Abstract
We use ultrasensitive electron backscatter diffraction (EBSD) to map the local crystal orientations, grains, and grain boundaries in CH3NH3PbI3 (MAPI) perovskite thin films. Although the true grain structure is broadly consistent with the morphology visible in scanning electron microscopy (SEM), the inverse pole figure maps taken with EBSD reveal grain structure and internal misorientation that is otherwise hidden. Local crystal misorientation is consistent with the presence of local strain which varies from one grain to the next. We acquire co-aligned confocal optical photoluminescence (PL) microscopy images on the same MAPI samples used for EBSD. We correlate optical and EBSD data, showing that PL is anticorrelated with the local grain orientation spread, suggesting that grains with higher degrees of crystalline orientational heterogeneity (local strain) exhibit more non-radiative recombination. Furthermore, we find that larger grains tend to have larger grain orientation spread, consistent with higher degrees of strain and non-radiative recombination.
- Authors:
- Publication Date:
- Research Org.:
- Univ. of Washington, Seattle, WA (United States)
- Sponsoring Org.:
- USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division
- OSTI Identifier:
- 1737675
- Alternate Identifier(s):
- OSTI ID: 1561116; OSTI ID: 1694331
- Grant/Contract Number:
- SC0013957
- Resource Type:
- Published Article
- Journal Name:
- Joule
- Additional Journal Information:
- Journal Name: Joule Journal Volume: 3 Journal Issue: 12; Journal ID: ISSN 2542-4351
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 14 SOLAR ENERGY; 36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 47 OTHER INSTRUMENTATION; perovskite solar cells; electron back scatter diffraction; local misorientation; non-radiative recombination; grain orientation; sub-grain boundaries; local strain; orientation heterogeneity; photoluminescence; semiconductor photovoltaics
Citation Formats
Jariwala, Sarthak, Sun, Hongyu, Adhyaksa, Gede W. P., Lof, Andries, Muscarella, Loreta A., Ehrler, Bruno, Garnett, Erik C., and Ginger, David S. Local Crystal Misorientation Influences Non-radiative Recombination in Halide Perovskites. United States: N. p., 2019.
Web. doi:10.1016/j.joule.2019.09.001.
Jariwala, Sarthak, Sun, Hongyu, Adhyaksa, Gede W. P., Lof, Andries, Muscarella, Loreta A., Ehrler, Bruno, Garnett, Erik C., & Ginger, David S. Local Crystal Misorientation Influences Non-radiative Recombination in Halide Perovskites. United States. https://doi.org/10.1016/j.joule.2019.09.001
Jariwala, Sarthak, Sun, Hongyu, Adhyaksa, Gede W. P., Lof, Andries, Muscarella, Loreta A., Ehrler, Bruno, Garnett, Erik C., and Ginger, David S. Sun .
"Local Crystal Misorientation Influences Non-radiative Recombination in Halide Perovskites". United States. https://doi.org/10.1016/j.joule.2019.09.001.
@article{osti_1737675,
title = {Local Crystal Misorientation Influences Non-radiative Recombination in Halide Perovskites},
author = {Jariwala, Sarthak and Sun, Hongyu and Adhyaksa, Gede W. P. and Lof, Andries and Muscarella, Loreta A. and Ehrler, Bruno and Garnett, Erik C. and Ginger, David S.},
abstractNote = {We use ultrasensitive electron backscatter diffraction (EBSD) to map the local crystal orientations, grains, and grain boundaries in CH3NH3PbI3 (MAPI) perovskite thin films. Although the true grain structure is broadly consistent with the morphology visible in scanning electron microscopy (SEM), the inverse pole figure maps taken with EBSD reveal grain structure and internal misorientation that is otherwise hidden. Local crystal misorientation is consistent with the presence of local strain which varies from one grain to the next. We acquire co-aligned confocal optical photoluminescence (PL) microscopy images on the same MAPI samples used for EBSD. We correlate optical and EBSD data, showing that PL is anticorrelated with the local grain orientation spread, suggesting that grains with higher degrees of crystalline orientational heterogeneity (local strain) exhibit more non-radiative recombination. Furthermore, we find that larger grains tend to have larger grain orientation spread, consistent with higher degrees of strain and non-radiative recombination.},
doi = {10.1016/j.joule.2019.09.001},
journal = {Joule},
number = 12,
volume = 3,
place = {United States},
year = {Sun Dec 01 00:00:00 EST 2019},
month = {Sun Dec 01 00:00:00 EST 2019}
}
https://doi.org/10.1016/j.joule.2019.09.001
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Works referencing / citing this record:
Electron‐Beam‐Related Studies of Halide Perovskites: Challenges and Opportunities
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- Nature Energy, Vol. 5, Issue 2
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