DataVXAdvanced Functional MaterialsPaper
journal article·2024-01Open access

Self‐Trapped Excitons‐Based Warm‐White Afterglow by Room‐Temperature Engineering toward Intelligent Multi‐Channel Information System

Huanxin Yang, Xiangxiang Chen, Haolin Lu, Yue Li, Wenda Sun, Yuhai Zhang, Xiaowang Liu, Guankui Long, Libing Zhang, Xiyan Li

Advanced Functional Materials· Volume 34· Issue 4
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Source abstract

Abstract

Abstract In the era of intelligence, the output colors of foundational phosphors are expected to be controlled by programs, while current activators‐determined afterglow candidates with fixed spectral channel have limitations in creating customized colors. Here, a long‐lived warm‐white emission is successfully demonstrated originating from self‐trapped excitons (STEs) in non‐toxic Cs2NaInCl6:Ag,Bi, ranging from 400 to 850 nm, of which the afterglow color can be easily customized using filters. This investigation indicates that 3% of Ag alloying breaks the dark STEs and introduces traps for efficient afterglow, while 3% Bi doping further improves the quantum yield to ≈100% and greatly enhances afterglow by ≈100‐fold compared with the initial intensity, allowing for an impressive afterglow persistence of over 20,000 s. Intriguingly, the self‐trapped defect bands from Jahn‐Teller distortions are prolonged from hundreds of femtoseconds to several hours, and they are first detected in the steady‐state absorption spectra after the cessation of excitation sources, contributing to the concluded dynamic afterglow model for STEs. And its intelligent application is corroborated by designed multi‐channel information system. These findings offer a novel scheme for understanding dynamic luminescence of STEs and supply an exemplification of designing white afterglow phosphors.
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Research context

Metals & alloys

OpenAlex topics: Perovskite Materials and Applications · Luminescence Properties of Advanced Materials · Luminescence and Fluorescent Materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Institute of Photoelectronic Thin Film Devices and Technology, Solar Energy Conversion Center Key Laboratory of Photoelectronic Thin Film Devices and Technology of Tianjin Engineering Research Center of Thin Film Photoelectronic Technology of Ministry of Education Nankai University Tianjin 300350 P. R. China

Institute for Advanced Interdisciplinary Research (IAIR) University of Jinan Jinan Shandong 250022 P. R. China

School of Materials Science and Engineering Nankai University Tianjin 300350 P. R. China

Frontiers Science Centre for Flexible Electronics (FSCFE) MIIT Key Laboratory of Flexible Electronics (KLoFE) Shaanxi Key Laboratory of Flexible Electronics Xi'an Key Laboratory of Flexible Electronics Xi'an Key Laboratory of Biomedical Materials & Engineering Xi'an Institute of Flexible Electronics Institute of Flexible Electronics (IFE) Northwestern Polytechnical University Xi'an Shaanxi 710072 P. R. China

Tianjin Key Laboratory of Molecular Optoelectronic Sciences Department of Chemistry Tianjin University Tianjin 300072 P. R. China

Funding

National Natural Science Foundation of China · Natural Science Foundation of Shandong Province

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