Pressure‐Suppressed Carrier Trapping Leads to Enhanced Emission in Two‐Dimensional Perovskite (HA) 2 (GA)Pb 2 I 7
Abstract
Abstract A remarkable PL enhancement by 12 fold is achieved using pressure to modulate the structure of a recently developed 2D perovskite (HA) 2 (GA)Pb 2 I 7 (HA= n ‐hexylammonium, GA=guanidinium). This structure features a previously unattainable, extremely large cage. In situ structural, spectroscopic, and theoretical analyses reveal that lattice compression under a mild pressure within 1.6 GPa considerably suppresses the carrier trapping, leading to significantly enhanced emission. Further pressurization induces a non‐luminescent amorphous yellow phase, which is retained and exhibits a continuously increasing band gap during decompression. When the pressure is released to 1.5 GPa, emission can be triggered by above‐band gap laser irradiation, accompanied by a color change from yellow to orange. The obtained orange phase could be retained at ambient conditions and exhibits two‐fold higher PL emission compared with the pristine (HA) 2 (GA)Pb 2 I 7 .
- Authors:
-
- Center for High Pressure Science and Technology Advanced Research (HPSTAR) Shanghai 201203 P. R. China
- Department of Chemistry University of Wisconsin-Madison Madison WI 53706 USA
- Publication Date:
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1647418
- Resource Type:
- Publisher's Accepted Manuscript
- Journal Name:
- Angewandte Chemie (International Edition)
- Additional Journal Information:
- Journal Name: Angewandte Chemie (International Edition) Journal Volume: 59 Journal Issue: 40; Journal ID: ISSN 1433-7851
- Publisher:
- Wiley Blackwell (John Wiley & Sons)
- Country of Publication:
- Germany
- Language:
- English
Citation Formats
Guo, Songhao, Zhao, Yongsheng, Bu, Kejun, Fu, Yongping, Luo, Hui, Chen, Mengting, Hautzinger, Matthew P., Wang, Yingqi, Jin, Song, Yang, Wenge, and Lü, Xujie. Pressure‐Suppressed Carrier Trapping Leads to Enhanced Emission in Two‐Dimensional Perovskite (HA) 2 (GA)Pb 2 I 7. Germany: N. p., 2020.
Web. doi:10.1002/anie.202001635.
Guo, Songhao, Zhao, Yongsheng, Bu, Kejun, Fu, Yongping, Luo, Hui, Chen, Mengting, Hautzinger, Matthew P., Wang, Yingqi, Jin, Song, Yang, Wenge, & Lü, Xujie. Pressure‐Suppressed Carrier Trapping Leads to Enhanced Emission in Two‐Dimensional Perovskite (HA) 2 (GA)Pb 2 I 7. Germany. https://doi.org/10.1002/anie.202001635
Guo, Songhao, Zhao, Yongsheng, Bu, Kejun, Fu, Yongping, Luo, Hui, Chen, Mengting, Hautzinger, Matthew P., Wang, Yingqi, Jin, Song, Yang, Wenge, and Lü, Xujie. Thu .
"Pressure‐Suppressed Carrier Trapping Leads to Enhanced Emission in Two‐Dimensional Perovskite (HA) 2 (GA)Pb 2 I 7". Germany. https://doi.org/10.1002/anie.202001635.
@article{osti_1647418,
title = {Pressure‐Suppressed Carrier Trapping Leads to Enhanced Emission in Two‐Dimensional Perovskite (HA) 2 (GA)Pb 2 I 7},
author = {Guo, Songhao and Zhao, Yongsheng and Bu, Kejun and Fu, Yongping and Luo, Hui and Chen, Mengting and Hautzinger, Matthew P. and Wang, Yingqi and Jin, Song and Yang, Wenge and Lü, Xujie},
abstractNote = {Abstract A remarkable PL enhancement by 12 fold is achieved using pressure to modulate the structure of a recently developed 2D perovskite (HA) 2 (GA)Pb 2 I 7 (HA= n ‐hexylammonium, GA=guanidinium). This structure features a previously unattainable, extremely large cage. In situ structural, spectroscopic, and theoretical analyses reveal that lattice compression under a mild pressure within 1.6 GPa considerably suppresses the carrier trapping, leading to significantly enhanced emission. Further pressurization induces a non‐luminescent amorphous yellow phase, which is retained and exhibits a continuously increasing band gap during decompression. When the pressure is released to 1.5 GPa, emission can be triggered by above‐band gap laser irradiation, accompanied by a color change from yellow to orange. The obtained orange phase could be retained at ambient conditions and exhibits two‐fold higher PL emission compared with the pristine (HA) 2 (GA)Pb 2 I 7 .},
doi = {10.1002/anie.202001635},
journal = {Angewandte Chemie (International Edition)},
number = 40,
volume = 59,
place = {Germany},
year = {Thu Aug 13 00:00:00 EDT 2020},
month = {Thu Aug 13 00:00:00 EDT 2020}
}
https://doi.org/10.1002/anie.202001635
Web of Science
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