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Updated: Aug 29, 2025

Fabrication of White Light-emitting Electrochemical Cells with Stable Emission from Exciplexes
Published on: November 15, 2016
Generation of Tunable Ultrastrong White-Light Emission by Activation of a Solid Supramolecule through
Yu-Yang Hu1, Xian-Yin Dai1, Xiaoyun Dong1
1College of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin, 300071, P. R. China.
Abstract:
Herein, we reported solid supramolecular bromonaphthylpyridinium polymers (P-BrNp), which exhibit tunable phosphorescence emission in the amorphous state enabled by sulfobutylether-β-cyclodextrin (SBE-β-CD) and diarylethene derivatives. The monomer BrNp gave single fluorescence emission at 490 nm, while an apparent room-temperature phosphorescence (RTP) at 550 nm emerged for P-BrNp copolymers with various feed ratios. Through fluorescence-phosphorescence dual emission, P-BrNp-0.1 displayed an ultrahigh white-light emission quantum yield of 83.9 %. Moreover, the subsequent assembly with SBE-β-CD further enhanced the phosphorescent quantum yield of P-BrNp-0.1 from 64.1 % to 71.3 %, accompanied by the conversion of photoluminescence emission from white to yellow. Diarylethene monomers were introduced as photoswitches to realize reversible RTP emission, which can be used in switchable data encryption and multifunctional writing ink.
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