Individual Electron and Hole Mobilities in Lead-Halide Perovskites Revealed by Noncontact Methods
Abstract
Charge carrier mobilities help determine semiconductor performance in optoelectronic applications, but measurement of the individual electron and hole mobilities usually involves indirect methods or probes with electrical contacts that are influenced by the quality of the interface or contact. Here, a noncontact method is introduced to distinguish the mobilities of electrons and holes by combining time-resolved terahertz spectroscopy (TRTS) and optical transient reflection (TR) spectroscopy. The validation of this method is first demonstrated on a semi-insulator GaAs wafer, and then, three lead-halide perovskite polycrystalline films with different cation mixtures are studied. We find that the hole mobility is significantly higher (~10x) than that of the electron mobility in all of the perovskite thin films studied. The highly alloyed triple cation polycrystalline film shows the highest mobility, longest bulk carrier lifetime, and lowest surface recombination velocity.
- Authors:
-
- National Renewable Energy Lab. (NREL), Golden, CO (United States)
- National Renewable Energy Lab. (NREL), Golden, CO (United States); Xiamen Univ., Xiamen (China)
- Publication Date:
- Research Org.:
- Energy Frontier Research Centers (EFRC) (United States). Center for Hybrid Organic-Inorganic Semiconductors for Energy (CHOISE); National Renewable Energy Lab. (NREL), Golden, CO (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1580494
- Report Number(s):
- NREL/JA-5900-74898
Journal ID: ISSN 2380-8195; TRN: US2102321
- Grant/Contract Number:
- AC36-08GO28308
- Resource Type:
- Accepted Manuscript
- Journal Name:
- ACS Energy Letters
- Additional Journal Information:
- Journal Volume: 5; Journal Issue: 1; Journal ID: ISSN 2380-8195
- Publisher:
- American Chemical Society (ACS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 14 SOLAR ENERGY; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; carrier mobility; THz; perovskite thin films
Citation Formats
Zhai, Yaxin, Wang, Kang, Zhang, Fei, Xiao, Chuanxiao, Rose, Aaron H., Zhu, Kai, and Beard, Matthew C. Individual Electron and Hole Mobilities in Lead-Halide Perovskites Revealed by Noncontact Methods. United States: N. p., 2019.
Web. doi:10.1021/acsenergylett.9b02310.
Zhai, Yaxin, Wang, Kang, Zhang, Fei, Xiao, Chuanxiao, Rose, Aaron H., Zhu, Kai, & Beard, Matthew C. Individual Electron and Hole Mobilities in Lead-Halide Perovskites Revealed by Noncontact Methods. United States. https://doi.org/10.1021/acsenergylett.9b02310
Zhai, Yaxin, Wang, Kang, Zhang, Fei, Xiao, Chuanxiao, Rose, Aaron H., Zhu, Kai, and Beard, Matthew C. Thu .
"Individual Electron and Hole Mobilities in Lead-Halide Perovskites Revealed by Noncontact Methods". United States. https://doi.org/10.1021/acsenergylett.9b02310. https://www.osti.gov/servlets/purl/1580494.
@article{osti_1580494,
title = {Individual Electron and Hole Mobilities in Lead-Halide Perovskites Revealed by Noncontact Methods},
author = {Zhai, Yaxin and Wang, Kang and Zhang, Fei and Xiao, Chuanxiao and Rose, Aaron H. and Zhu, Kai and Beard, Matthew C.},
abstractNote = {Charge carrier mobilities help determine semiconductor performance in optoelectronic applications, but measurement of the individual electron and hole mobilities usually involves indirect methods or probes with electrical contacts that are influenced by the quality of the interface or contact. Here, a noncontact method is introduced to distinguish the mobilities of electrons and holes by combining time-resolved terahertz spectroscopy (TRTS) and optical transient reflection (TR) spectroscopy. The validation of this method is first demonstrated on a semi-insulator GaAs wafer, and then, three lead-halide perovskite polycrystalline films with different cation mixtures are studied. We find that the hole mobility is significantly higher (~10x) than that of the electron mobility in all of the perovskite thin films studied. The highly alloyed triple cation polycrystalline film shows the highest mobility, longest bulk carrier lifetime, and lowest surface recombination velocity.},
doi = {10.1021/acsenergylett.9b02310},
journal = {ACS Energy Letters},
number = 1,
volume = 5,
place = {United States},
year = {Thu Nov 21 00:00:00 EST 2019},
month = {Thu Nov 21 00:00:00 EST 2019}
}
Web of Science
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