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Title: Room-temperature polariton lasing in all-inorganic perovskite nanoplatelets
Authors: Su, Rui
Diederichs, Carole
Wang, Jun
Liew, Timothy Chi Hin
Zhao, Jiaxin
Liu, Sheng
Xu, Weigao
Chen, Zhanghai
Xiong, Qihua
Keywords: Science::Physics
Issue Date: 2017
Source: Su, R., Diederichs, C., Wang, J., Liew, T. C. H., Zhao, J., Liu, S., . . . Xiong, Q. (2017). Room-temperature polariton lasing in all-inorganic perovskite nanoplatelets. Nano Letters, 17(6), 3982-3988. doi:10.1021/acs.nanolett.7b01956
Journal: Nano Letters 
Abstract: Polariton lasing is the coherent emission arising from a macroscopic polariton condensate first proposed in 1996. Over the past two decades, polariton lasing has been demonstrated in a few inorganic and organic semiconductors in both low and room temperatures. Polariton lasing in inorganic materials significantly relies on sophisticated epitaxial growth of crystalline gain medium layers sandwiched by two distributed Bragg reflectors in which combating the built-in strain and mismatched thermal properties is nontrivial. On the other hand, organic active media usually suffer from large threshold density and weak nonlinearity due to the Frenkel exciton nature. Further development of polariton lasing toward technologically significant applications demand more accessible materials, ease of device fabrication, and broadly tunable emission at room temperature. Herein, we report the experimental realization of room-temperature polariton lasing based on an epitaxy-free all-inorganic cesium lead chloride perovskite nanoplatelet microcavity. Polariton lasing is unambiguously evidenced by a superlinear power dependence, macroscopic ground-state occupation, blueshift of the ground-state emission, narrowing of the line width and the buildup of long-range spatial coherence. Our work suggests considerable promise of lead halide perovskites toward large-area, low-cost, high-performance room-temperature polariton devices and coherent light sources extending from the ultraviolet to near-infrared range.
ISSN: 1530-6984
DOI: 10.1021/acs.nanolett.7b01956
Schools: School of Electrical and Electronic Engineering 
School of Physical and Mathematical Sciences 
Organisations: CNRS-UNS-NUS-NTU International Joint Research Unit
Nanoelectronics Center of Excellence
Rights: This document is the Accepted Manuscript version of a Published Work that appeared in final form in Nano Letters, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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