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@article{Zhang:2023:10.1002/adma.202300922,
author = {Zhang, J and Qin, J and Cai, W and Tang, Y and Zhang, H and Wang, T and Bakulin, A and Hu, B and Liu, X-K and Gao, F},
doi = {10.1002/adma.202300922},
journal = {Advanced Materials},
title = {Transport layer engineering toward lower threshold for perovskite lasers},
url = {http://dx.doi.org/10.1002/adma.202300922},
volume = {35},
year = {2023}
}

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TY  - JOUR
AB  - Charge-transport layers are essential for achieving electrically pumped perovskite lasers. However, their role in perovskite lasing is not fully understood. Here, the role of charge-transport layers on the lasing actions of perovskite films is explored by investigating the amplified spontaneous emission (ASE) thresholds. A largely reduced ASE threshold and enhanced ASE intensity is demonstrated by introducing an additional hole transport layer poly(triaryl amine) (PTAA). It is shown that the key role of the PTAA layer is to accelerate the hot-carrier cooling process by extracting holes in perovskites. With reduced hot holes, the Auger recombination loss is largely suppressed, resulting in decreased ASE threshold. This argument is further supported by the fact that the ASE threshold can be further reduced from 25.7 to 7.2 µJ cm−2 upon switching the pumping wavelength from 400 to 500 nm to directly avoid excess hot-hole generation. This work exemplifies how to further reduce the ASE threshold with transport layer engineering through hot-hole manipulation. This is critical to maintaining the excellent gain properties of perovskites when integrating them into electrical devices, paving the way for electrically pumped perovskite lasers.
AU  - Zhang,J
AU  - Qin,J
AU  - Cai,W
AU  - Tang,Y
AU  - Zhang,H
AU  - Wang,T
AU  - Bakulin,A
AU  - Hu,B
AU  - Liu,X-K
AU  - Gao,F
DO  - 10.1002/adma.202300922
PY  - 2023///
SN  - 0935-9648
TI  - Transport layer engineering toward lower threshold for perovskite lasers
T2  - Advanced Materials
UR  - http://dx.doi.org/10.1002/adma.202300922
UR  - https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:001004541900001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=a2bf6146997ec60c407a63945d4e92bb
UR  - https://onlinelibrary.wiley.com/doi/10.1002/adma.202300922
UR  - http://hdl.handle.net/10044/1/116158
VL  - 35
ER  -

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