A green light perovskite laser and a preparation method thereof

By combining the creation of a DMSO atmosphere in a spin coater with a distributed Bragg mirror, the problem of controlling the mixed phase composition during the crystallization of quasi-two-dimensional perovskite was solved, and a green perovskite laser with high energy transfer efficiency was prepared, realizing continuous laser pumping at room temperature.

CN116742473BActive Publication Date: 2026-07-24CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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Patent Information

Application Number
CN202310654211.6
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-06-05
Publication Date
2026-07-24
Estimated Expiration
2043-06-05

AI Technical Summary

Technical Problem

Quasi-two-dimensional perovskites are difficult to control in terms of mixed phase composition due to rapid crystallization, which affects energy transfer efficiency. The solvent vapor atmosphere has a significant impact in the existing solution preparation process, resulting in low crystal quality and low energy transfer efficiency.

Method used

A dimethyl sulfoxide (DMSO) atmosphere was created in a closed spin coater to slow down the crystallization process. The crystallization rate and phase distribution were controlled by combining the alternating structure of distributed Bragg mirrors with the perovskite luminescent layer, thus preparing a high-quality perovskite thin film.

Benefits of technology

We have achieved perovskite thin films with smooth surfaces, high crystallinity, and high energy transfer efficiency, constructed an effective microcavity, and realized a green perovskite laser continuously pumped at room temperature.

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Abstract

The present application relates to a kind of green light perovskite laser and its preparation method, solve the problem that the energy transfer efficiency of the existing quasi-two-dimensional perovskite is not conducive to the regulation of mixed phase component due to rapid crystallization.The laser includes substrate and the bottom distributed bragg reflector of the alternating structure of titanium oxide and silicon dioxide arranged on substrate in turn, the perovskite luminescent layer of atmosphere auxiliary crystallization created by DMSO and the top distributed bragg reflector of the alternating structure of zinc sulfide and yttrium fluoride.The present application delays the crystallization process of quasi-two-dimensional perovskite by DMSO atmosphere, effectively improves the crystal quality of perovskite, regulates the phase distribution of quasi-two-dimensional perovskite, speeds up the energy transfer process from small n phase (n=2) to large n phase (n≥5), and prepares perovskite film with low surface roughness and good crystallinity. By combining distributed bragg reflector, a microcavity laser is realized under room temperature continuous laser pumping.
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