Low‐threshold Amplified Spontaneous Emission of Dion‐Jacobson Phase Perovskite Films Achieved by Tuning Diamine Cation Size

physica status solidi (RRL) – Rapid Research Letters Pub Date : 2024-06-10 DOI:10.1002/pssr.202400080

Liang Wang, Yongxiang Zhang, Mengtong Yan, Junxi Zhang, Hongbo Lu, Mei Lyu, Jun Zhu

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Abstract

Dion‐Jacobson (DJ) phase perovskites have received attention in the field of amplified spontaneous radiation (ASE) and lasers due to their excellent structural stability and charge transfer performance. However, the effect of the diamine cation size on the ASE properties of DJ phase perovskite has not been studied. Herein, we systematically study the effect and the results show that tuning the size of the diamine cation can inhibit the formation of the small‐n phases, reduce the surface roughness, and passivate defects of DJ phase perovskite films. Based on those, we realize the low‐threshold ASE (65 μJ cm−2 under nanosecond laser excitation) of the 1,3‐propylenediamine cation (PDA)‐based DJ phase perovskite films. Additionally, the film exhibits excellent photostability. The ASE intensity remains at 90% of the original value after a pulsed laser irradiation of 3000 μJ cm−2 for 120 min. This work provides a strategy to realize high‐performance DJ phase perovskite ASE and lasers.This article is protected by copyright. All rights reserved.

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通过调节二胺阳离子尺寸实现迪昂-雅各布森相包晶石薄膜的低阈值放大自发辐射

Dion-Jacobson (DJ) 相包晶石因其出色的结构稳定性和电荷转移性能，在放大自发辐射（ASE）和激光领域备受关注。然而，关于二胺阳离子尺寸对 DJ 相包晶石 ASE 性能的影响还没有研究。在此，我们对其影响进行了系统研究，结果表明，调整二胺阳离子的大小可以抑制小n相的形成，降低表面粗糙度，钝化DJ相包晶石薄膜的缺陷。在此基础上，我们实现了 1,3-丙二胺阳离子（PDA）基 DJ 相包晶石薄膜的低阈值 ASE（纳秒激光激发下 65 μJ cm-2）。此外，该薄膜还具有出色的光稳定性。在 3000 μJ cm-2 的脉冲激光照射 120 分钟后，ASE 强度仍保持在原始值的 90%。本文受版权保护。本文受版权保护。

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