Stimuli-responsive photoluminescent copper(Ⅰ) halides for scintillation, anticounterfeiting, and light-emitting diode applications  

作　　者：Dilruba A.Popy Yashpal Singh Yauhen Tratsiak Abby M.Cardoza John M.Lane Luis Stand Mariya Zhuravleva Neeraj Rai Bayram Saparov 

机构地区：[1]Department of Chemistry and Biochemistry,University of Oklahoma,Norman,Oklahoma,USA [2]Dave C.Swalm School of Chemical Engineering and Center for Advanced Vehicular Systems,Mississippi State University,Mississippi State,Mississippi,USA [3]Scintillation Materials Research Center,University of Tennessee,Knoxville,Tennessee,USA

出　　处：《Aggregate》2024年第5期465-480,共16页聚集体（英文）

基　　金：National Science Foundation,Grant/Award Numbers:NSF DMR-2045490,CHE-1726630,1757220,2138259,2138286,2138307,2137603,2138296。

摘　　要：Highly sensitive stimuli-responsive luminescent materials are crucial for appli-cations in optical sensing,security,and anticounterfeiting.Here,we report two zero-dimensional(0D)copper(I)halides,(TEP)_(2)Cu_(2)Br_(4),(TEP)_(2)Cu_(4)Br_(6),and 1D(TEP)_(3)Ag_(6)Br_(9),which are comprised of isolated[Cu_(2)Br_(4)]^(2-),[Cu_(4)Br_(6)]^(2-),and[Ag_(6)Br_(9)]3-polyanions,respectively,separated by TEP^(+)(tetraethylphosphonium[TEP])cations.(TEP)_(2)Cu_(2)Br_(4) and(TEP)_(2)Cu_(4)Br_(6) demonstrate greenish-white and orange-red emissions,respectively,with near unity photoluminescence quantum yields,while(TEP)_(3)Ag_(6)Br_(9) is a poor light emitter.Optical spectroscopy mea-surements and density-functional theory calculations reveal that photoemissions of these compounds originate from self-trapped excitons due to the excited-state distor-tions in the copper(I)halide units.Crystals of Cu(I)halides are radioluminescence active at room temperature under both X-andγ-rays exposure.The light yields up to 15,800 ph/MeV under 662 keVγ-rays of ^(137)Cs suggesting their potential for scintillation applications.Remarkably,(TEP)_(2)Cu_(2)Br_(4) and(TEP)_(2)Cu_(4)Br_(6) are inter-convertible through chemical stimuli or reverse crystallization.In addition,both compounds demonstrate luminescence on-off switching upon thermal stimuli.The sensitivity of(TEP)_(2)Cu_(2)Br_(4) and(TEP)_(2)Cu_(4)Br_(6) to the chemical and thermal stimuli coupled with their ultrabright emission allows their consideration for applications such as solid-state lighting,sensing,information storage,and anticounterfeiting.

关 键 词：0D copper(I)halides anticounterfeiting efficient photoluminescence SCINTILLATORS solid-state lighting 

分 类 号：TN312.8[电子电信—物理电子学]