Light-Induced Dielectric Enhancement in a 2D Dion–Jacobson Type Perovskite Phase Transition Material,Advanced Optical Materials

当前位置： X-MOL 学术 › Adv. Opt. Mater. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Light-Induced Dielectric Enhancement in a 2D Dion–Jacobson Type Perovskite Phase Transition Material
Advanced Optical Materials ( IF 8.0 ) Pub Date : 2023-08-24 , DOI: 10.1002/adom.202301148
Changhao Gao _{1,

2} , Haojie Xu _{2,

3} , Wuqian Guo _{2,

3} , Yi Liu ₂ , Qingshun Fan _{2,

3} , Yu Ma _{2,

3} , Tian Yang _{1,

2} , Wenjing Li _{2,

3} , Junhua Luo _{1,

2,

3} , Zhihua Sun _{1,

2,

3}

Affiliation

Stimuli-responsive materials, showing bistable behaviors between two distinct states under external stimuli, can be potentially applied as basic components of modern electrical and electronic devices. 2D hybrid perovskites hold a promise to switch and tune dielectric bistability based on their solid-state phase transitions. Here, strong dielectric enhancements are successfully actualized by virtue of light illumination in a Dion–Jacobson (DJ) type 2D hybrid perovskite, (HDA)(MA)₂Pb₃Br₁₀ (1, where HDA is 1,6-hexanediammonium and MA is methylammonium). Upon heating, 1 exhibits an ordered–disordered phase transition ≈ 324 K (T_c), accompanying a transition from its low to high dielectric state. Strikingly, its light-induced dielectric constant changes are greatly enhanced with a magnitude up to 250% near the T_c, superior to most traditional inorganic phase transition materials. This process closely relates to the photoexcited dielectric effect that is caused by the interband photo-excitation. Benefitting from the stability of DJ-type perovskite structure, the switching cycles of dielectric enhancement display operational stability with superior anti-fatigue characteristics. As per the knowledge, the findings of this strong dielectric enhancement are unprecedented in the family of 2D DJ-type hybrid perovskites, which will facilitate broad interest in exploiting new stimuli-responsive materials to assemble high-performance smart electronic devices.

中文翻译：

二维 Dion-Jacobson 型钙钛矿相变材料中的光致介电增强

刺激响应材料在外部刺激下表现出两种不同状态之间的双稳态行为，可以潜在地用作现代电气和电子设备的基本组件。二维混合钙钛矿有望根据其固态相变来切换和调整介电双稳态。在这里，借助 Dion–Jacobson (DJ) 型二维混合钙钛矿 (HDA)(MA) 的光照射，成功实现了强介电增强₂Pb₃Br₁₀ (1，其中 HDA 是 1,6-己烷二铵，MA 是甲基铵）。加热后，1 表现出有序-无序相变 ≈ 324 K (T_c)，伴随着从低介电状态到高介电状态的转变。引人注目的是，在 T_c 附近，其光引起的介电常数变化大大增强，幅度高达 250% ，优于大多数传统的无机相变材料。该过程与带间光激发引起的光激发介电效应密切相关。受益于DJ型钙钛矿结构的稳定性，介电增强的切换循环显示出操作稳定性和优异的抗疲劳特性。据了解，这种强介电增强的发现在2D DJ型杂化钙钛矿家族中是前所未有的，这将激发人们对利用新型刺激响应材料来组装高性能智能电子设备的广泛兴趣。

更新日期：2023-08-24

点击分享查看原文

点击收藏

公开下载

阅读更多本刊新发论文本刊介绍/投稿指南