Tuning spin-orbit coupling towards enhancing photocurrent in hybrid organic-inorganic perovskites by using mixed organic cations
Abstract
The presence of the heavy elements leads to strong spin-orbit coupling (SOC) in hybrid organic-inorganic perovskites (HOIPs), which plays an important role in the photovoltaic performance of HOIPs by changing the populations between bright and dark states. The organic cation is a critical composition and affects SOC via the interaction with the inorganic cage. In this work, we use magneto-photocurrent measurement to explore the SOC effect upon using mixed organic cations (methylammonium (MA) and formamidinium (FA)) with different dipole moments in Pb based perovskites. Magneto-photocurrent measurements showed that the internal magnetic parameter B0 is decreased from 402.41 mT to 180.18 mT and 104.58 mT with decreasing the MA/FA ratio. This provides evidence that changing the internal dipole moment by using mixed organic cations can essentially change the SOC in HOIPs. Simultaneously, the photocurrent is increased from 21.46 mA/cm2 to 22.60 mA/cm2 and 23.08 mA/cm2 when the MA/FA ratio is changed from 1:0 to 0.9:0.1 and 0.7:0.3. Above all, our results indicate that the change in SOC by different organic cations can also be a factor affecting the performance of perovskite solar cells.
- Authors:
-
[2];
[2];
- Univ. of Tennessee, Knoxville, TN (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)
- Publication Date:
- Research Org.:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1631227
- Alternate Identifier(s):
- OSTI ID: 1694214
- Grant/Contract Number:
- AC05-00OR22725
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Organic Electronics
- Additional Journal Information:
- Journal Volume: 81; Journal Issue: C; Journal ID: ISSN 1566-1199
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; Perovskites; Solar cells; Spin-orbit coupling; Organic cation; Photocurrent
Citation Formats
Dou, Yixuan, Xu, Hengxing, Liu, Yongtao, Wang, Miaosheng, Zhang, Jia, Ovchinnikova, Olga S., and Hu, Bin. Tuning spin-orbit coupling towards enhancing photocurrent in hybrid organic-inorganic perovskites by using mixed organic cations. United States: N. p., 2020.
Web. doi:10.1016/j.orgel.2020.105671.
Dou, Yixuan, Xu, Hengxing, Liu, Yongtao, Wang, Miaosheng, Zhang, Jia, Ovchinnikova, Olga S., & Hu, Bin. Tuning spin-orbit coupling towards enhancing photocurrent in hybrid organic-inorganic perovskites by using mixed organic cations. United States. https://doi.org/10.1016/j.orgel.2020.105671
Dou, Yixuan, Xu, Hengxing, Liu, Yongtao, Wang, Miaosheng, Zhang, Jia, Ovchinnikova, Olga S., and Hu, Bin. Thu .
"Tuning spin-orbit coupling towards enhancing photocurrent in hybrid organic-inorganic perovskites by using mixed organic cations". United States. https://doi.org/10.1016/j.orgel.2020.105671. https://www.osti.gov/servlets/purl/1631227.
@article{osti_1631227,
title = {Tuning spin-orbit coupling towards enhancing photocurrent in hybrid organic-inorganic perovskites by using mixed organic cations},
author = {Dou, Yixuan and Xu, Hengxing and Liu, Yongtao and Wang, Miaosheng and Zhang, Jia and Ovchinnikova, Olga S. and Hu, Bin},
abstractNote = {The presence of the heavy elements leads to strong spin-orbit coupling (SOC) in hybrid organic-inorganic perovskites (HOIPs), which plays an important role in the photovoltaic performance of HOIPs by changing the populations between bright and dark states. The organic cation is a critical composition and affects SOC via the interaction with the inorganic cage. In this work, we use magneto-photocurrent measurement to explore the SOC effect upon using mixed organic cations (methylammonium (MA) and formamidinium (FA)) with different dipole moments in Pb based perovskites. Magneto-photocurrent measurements showed that the internal magnetic parameter B0 is decreased from 402.41 mT to 180.18 mT and 104.58 mT with decreasing the MA/FA ratio. This provides evidence that changing the internal dipole moment by using mixed organic cations can essentially change the SOC in HOIPs. Simultaneously, the photocurrent is increased from 21.46 mA/cm2 to 22.60 mA/cm2 and 23.08 mA/cm2 when the MA/FA ratio is changed from 1:0 to 0.9:0.1 and 0.7:0.3. Above all, our results indicate that the change in SOC by different organic cations can also be a factor affecting the performance of perovskite solar cells.},
doi = {10.1016/j.orgel.2020.105671},
journal = {Organic Electronics},
number = C,
volume = 81,
place = {United States},
year = {Thu Feb 27 00:00:00 EST 2020},
month = {Thu Feb 27 00:00:00 EST 2020}
}
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