Formamidine Engineering the Lattice Distortion of Chiral Halide Perovskites for Efficient Blue Circularly Polarized Emission,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.)

Formamidine Engineering the Lattice Distortion of Chiral Halide Perovskites for Efficient Blue Circularly Polarized Emission
Advanced Optical Materials ( IF 8.0 ) Pub Date : 2023-08-01 , DOI: 10.1002/adom.202202726
Qianwen Guan _{1,

2} , Huang Ye _{1,

2} , Tingting Zhu ₁ , Xinyuan Zhang _{1,

2} , Shihai You ₁ , Jianbo Wu _{1,

2} , Youxuan Zheng ₃ , Xitao Liu ₁ , Junhua Luo ₁

Affiliation

Chiral halide perovskites have emerged as promising circularly polarized light sources due to their great potential applications in 3D displays, optical data storage, and optical communication devices. However, to date, chiral halide perovskites with efficient blue circularly polarized luminescence (CPL) are scarcely unearthed. Herein, through formamidine engineering to decrease lattice distortion, the first new types of chiral corrugated 2D halide perovskites are presented (R/S)-(BPEA)FAPbBr₄·H₂O (2-R/S) (BPEA = 4-bromophenylethylaminium, FA = formamidinium). Interestingly, driven by the incorporation of FA organic cations, the chiral perovskite layer realizes the transformation from (100)-oriented (R/S)-(BPEA)₂PbBr₄·H₂O (1-R/S) to (110)-oriented 2-R/S accompanying with reduced lattice distortion. More importantly, (110)-oriented chiral perovskites 2-R exhibit remarkable blue CPL with large asymmetry factors (g_lum =8.4 × 10⁻³). This work offers an exciting approach to realizing efficient blue CPL and promotes their further applications in photoelectronic devices.

中文翻译：

甲脒改造手性卤化物钙钛矿的晶格畸变以实现高效的蓝光圆偏振发射

手性卤化物钙钛矿因其在 3D 显示、光学数据存储和光通信设备中的巨大应用潜力而成为有前途的圆偏振光源。然而，迄今为止，具有高效蓝色圆偏振发光（CPL）的手性卤化物钙钛矿还很少被发现。在此，通过甲脒工程减少晶格畸变，提出了第一种新型手性波纹二维卤化物钙钛矿 ( R / S )-(BPEA)FAPbBr ₄ ·H ₂ O (2- R / S)（BPEA = 4-溴苯乙胺，FA = 甲脒）。有趣的是，在FA有机阳离子掺入的驱动下，手性钙钛矿层实现了从（100）取向（ R / S）-（BPEA）₂ PbBr ₄ ·H ₂ O（1- R / S）到（110）的转变。) 取向的 2- R / S伴随着晶格畸变的减少。更重要的是，(110)取向的手性钙钛矿2- R表现出显着的蓝色CPL，具有大的不对称因子( g _lum =8.4 × 10 ^-3）。这项工作为实现高效蓝色 CPL 提供了一种令人兴奋的方法，并促进了其在光电器件中的进一步应用。

更新日期：2023-08-01

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南