Thermochromic Phosphors Based on One‐Dimensional Ionic Copper‐Iodine Chains Showing Solid‐State Photoluminescence Efficiency Exceeding 99

Thermochromic phosphors are intriguing materials for realizing thermochromic behaviors of light‐emitting diodes. Here a highly luminescent and stable thermochromic phosphor based on one‐dimensional Cu4I6(4‐dimethylamino‐1‐ethylpyridinium)2 is reported. This unique ionic copper‐iodine chain‐based hyb...

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Published inAngewandte Chemie Vol. 134; no. 38
Main Authors Song, Kuang‐Hui, Wang, Jing‐Jing, Feng, Li‐Zhe, He, Fuxiang, Yin, Yi‐Chen, Yang, Jun‐Nan, Song, Yong‐Hui, Zhang, Qian, Ru, Xue‐Chen, Lan, Yi‐Feng, Zhang, Guozhen, Yao, Hong‐Bin
Format Journal Article
LanguageEnglish
Published Weinheim Wiley Subscription Services, Inc 19.09.2022
Subjects
Atom Migration
Chains
Charge transfer
Chemistry
Copper
Copper-Iodine Chains
Crystal Transformation
First principles
Iodine
Light emitting diodes
Luminescence
Phosphorescence
Phosphors
Photoluminescence
Photons
Space charge
Thermochromism
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Summary:Thermochromic phosphors are intriguing materials for realizing thermochromic behaviors of light‐emitting diodes. Here a highly luminescent and stable thermochromic phosphor based on one‐dimensional Cu4I6(4‐dimethylamino‐1‐ethylpyridinium)2 is reported. This unique ionic copper‐iodine chain‐based hybrid exhibits near‐unity photoluminescence efficiency owing to the through‐space charge‐transfer character of relevant electronic transitions. More importantly, an alternative mechanism of thermochromic phosphorescence was unraveled, supported by a first principles simulation of concerted copper atom migration in the copper‐iodine chain. Furthermore, we successfully fabricate a bright thermochromic light‐emitting diode using this Cu4I6(4‐dimethylamino‐1‐ethylpyridinium)2 thermochromic phosphor. Our reported flexible ionic copper‐iodine chain‐based thermochromic luminescent material represents a new type of cost‐effective functional phosphor. A novel thermochromic 1D‐Cu4I6(4‐dimethylamino‐1‐ ethylpyridinium)2 hybrid phosphor with near‐unity photoluminescence efficiency is reported involving a mechanism of reversible single‐crystal‐to‐single‐crystal transformation induced bytemperature‐responsive concerted Cu atom migration in ionic copper‐iodine chains .
ISSN:0044-8249
1521-3757
DOI:10.1002/ange.202208960