准二维钙钛矿中结晶调控与低阈值微纳激光器

doi:10.11896/cldb.22110309

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Abstract Quasi-two-dimensional (Q-2D) perovskite is a promising material that can be applied in novel optoelectronic devices due to its large exciton binding energy and quantum-confined effects. However, Q-2D perovskites exhibit multiphase structures with grain boundaries and interfaces, leading to non-radiative losses during energy transfer. In this work, we achieved a more efficient energy transfer in the Q-2D perovskite by regulating the crystallization kinetic processes in different n-phases. Control of the Q-2D perovskite nucleation and growth process was realized by introducing sodium ions into the Q-2D perovskite precursors. It is found that the incorporation of sodium ions promotes the nucleation of the high n-phase, making the different n-phases more evenly distributed in space, and the characterization of the lifetime confirms that sodium ions doping promotes energy transfer. Thanks to this efficient energy transfer process, the optical amplification threshold of doped films is decreased from 23.3 μJ·cm^-2 to 14.3 μJ·cm^-2. The results provide a new effective method to optimize the photonics properties of Q-2D perovskites, thus further broadening the range of photonics applications of Q-2D perovskites.

Key words： quasi-two-dimensional perovskite Na⁺-doped crystallization modulation energy transfer micro/nano lasers

Published: 25 June 2024 Online: 2024-07-17

CLC number:

TN201

Fund:Science and Technology Development Plan Project of Jilin Province (20190601043FG).

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	GAO Huaxing
	ZHANG Hongqi
	LI Xuan

Cite this article:

GAO Huaxing,ZHANG Hongqi,LI Xuan. Crystallization Modulation and Low-threshold Micro/Nano Laser in Quasi-two-dimensional Perovskites[J]. Materials Reports, 2024, 38(12): 22110309-5.

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http://www.mater-rep.com/EN/10.11896/cldb.22110309 OR http://www.mater-rep.com/EN/Y2024/V38/I12/22110309

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