MAPbI3 perovskite has attracted widespread interests for developing low-cost near infrared semiconductor gain media.However,it faces the instability issue under operation conditions,which remains a critical challenge.It is found that the instability of the MAPbI3 nanoplatelet laser comes from the thermal-induced degradation pro-gressing from the surface defects towards neighboring regions.By using PbI2 passivation,the defect-initiated degradation is significantly suppressed and the nanoplatelet degrades in a layer-by-layer way,enabling the MAPbI3 laser to sustain for 4500 s(2.7×107 pulses),which is nearly three times longer than that of the nano-platelet laser without passivation.Meanwhile,the PbI2 passivated MAPbI3 nanoplatelet laser with the nanopla-telet cavity displays a maximum quality factor up to～7800,the highest reported for all MAPbI3 nanoplatelet cavities.Furthermore,a high stability MAPbI3 nanoplatelet laser that can last for 8500 s(5.1×107 pulses)is demonstrated based on a dual passivation strategy,by retarding the defect-initiated degradation and surface-initiated degradation simultaneously.This work provides in-depth insights for understanding the operating deg-radation of perovskite lasers,and the dual passivation strategy paves the way for developing high stability near infrared semiconductor laser media.

GUOHUI LI;HUIHUI PI;YANFU WEI;BOLIN ZHOU;YA GAO;RONG WEN;YUYING HAO;HAN ZHANG;BENG S.ONG;YANXIA CUI

College of Physics and Optoelectronics,Key Laboratory of Interface Science and Engineering in Advanced Materials,Key Laboratory of Advanced Transducers and Intelligent Control System of Ministry of Education,Taiyuan University of Technology,Taiyuan 030024,China;Collaborative Innovation Centre for Optoelectronic Science and Technology,Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province,College of Physics and Optoelectronic Engineering,Shenzhen Key Laboratory of Micro-Nano Photonic Information Technology,Guangdong Laboratory of Artificial Intelligence and Digital Economy(SZ),Shenzhen University,Shenzhen 518060,China;Department of Chemistry,Research Centre of Excellence for Organic Electronics,Institute of Advanced Materials,Hong Kong Baptist University,Kowloon Tong,Hong Kong,China

光子学研究（英文）

[1]GUOHUI LI;HUIHUI PI;YANFU WEI;BOLIN ZHOU;YA GAO;RONG WEN;YUYING HAO;HAN ZHANG;BENG S.ONG;YANXIA CUI-.Passivation of degradation path enables high performance perovskite nanoplatelet lasers with high operational stability)[J].光子学研究（英文）,2022(06):1440-1452

gressing,nanopla,telet

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