Intrinsic Self‐Trapped Emission in 0D Lead‐Free (C4H14N2)2In2Br10 Single Crystal

Low‐dimensional lead halide perovskite materials recently have drawn much attention owing to the intriguing broadband emissions; however, the toxicity of lead will hinder their future development. Now, a lead‐free (C4H14N2)2In2Br10 single crystal with a unique zero‐dimensional (0D) structure constit...

Full description

Saved in:
Bibliographic Details
Published inAngewandte Chemie Vol. 131; no. 43; pp. 15581 - 15586
Main Authors Zhou, Lei, Liao, Jin‐Feng, Huang, Zeng‐Guang, Wei, Jun‐Hua, Wang, Xu‐Dong, Chen, Hong‐Yan, Kuang, Dai‐Bin
Format Journal Article
LanguageEnglish
Published Weinheim Wiley Subscription Services, Inc 21.10.2019
Subjects
Bleifreie Materialien
Broadband
Chemistry
Computer applications
Crystal structure
Emission
Emission measurements
Excitons
Indium
Lead
Lead compounds
Metal halides
Niederdimensionale Materialien
Perovskites
Photoluminescence
Photolumineszenz
Photons
Selbstabgefangene Excitonen
Single crystals
Toxicity
Visible spectrum
Online AccessGet full text

Cover

More Information
Summary:Low‐dimensional lead halide perovskite materials recently have drawn much attention owing to the intriguing broadband emissions; however, the toxicity of lead will hinder their future development. Now, a lead‐free (C4H14N2)2In2Br10 single crystal with a unique zero‐dimensional (0D) structure constituted by [InBr6]3− octahedral and [InBr4]− tetrahedral units is described. The single crystal exhibits broadband photoluminescence (PL) that spans almost the whole visible spectrum with a lifetime of 3.2 μs. Computational and experimental studies unveil that an excited‐state structural distortion in [InBr6]3− octahedral units enables the formation of intrinsic self‐trapped excitons (STEs) and thus contributing the broad emission. Furthermore, femtosecond transient absorption (fs‐TA) measurement reveals that the ultrafast STEs formation together with an efficient intersystem crossing has made a significant contribution to the long‐lived and broad STE‐based emission behavior. Bleifrei ist ein Indium‐basierter (C4H14N2)2In2Br10‐Einkristall, der synthetisiert und charakterisiert werden konnte und eine einzigartige 0D‐Kristallstruktur aufweist. Eine ultrabreite Photolumineszenz auf Basis intrinsischer selbstabgefangener Excitonen wird als Resultat einer Strukturverzerrung in [InBr6]3−‐Oktaedern im angeregten Zustand beobachtet.
Bibliography:These authors contributed equally to this work.
ISSN:0044-8249
1521-3757
DOI:10.1002/ange.201907503