Red-emitting tetraphenylethylene derivative with aggregation-induced enhanced emission for luminescent solar concentrators:A combined experimental and density functional theory study  

作　　者：Cosimo Micheletti Qinfan Wang Francesco Ventura Michele Turelli Ilaria Ciofini Carlo Adamo Andrea Pucci 

机构地区：[1]Department of Chemistry and Industrial Chemistry,University of Pisa,Pisa,Italy [2]École nationale supérieure de chimie de Paris,Centre national de la recherche scientifique,Institute of Chemistry for Life and Health Sciences,PSL Research University,Paris,France [3]Institut Universitaire de France,Paris,France

出　　处：《Aggregate》2022年第2期177-186,共10页聚集体（英文）

基　　金：MIUR-PRIN,Grant/Award Number:20179BJNA2;European Union’s Horizon 2020 Research and Innovation Program,Grant/Award Number:648558;China Scholarship Council,Grant/Award Number:202006890004。

摘　　要：This study examines the use of an aggregation-induced enhanced emission fluorophore(TPE-MRh)to prepare red-emitting luminescent solar concentrators(LSCs)based on poly(methyl methacrylate)(PMMA)and poly(cyclohexyl methacrylate)(PCMA).TPE-MRh is a tetraphenylethylene(TPE)derivative bearing two dimethylamino push groups and a 3-methyl-rhodanine pull moiety,with absorption maxima at around 500 nm and fluorescence peak at 700 nm that strongly increases in solid-state.TPE-MRh displays a typical crystallizationinduced enhanced emission that has been rationalized by modeling the compound behavior in solution and solid-state via density functional theory calculations with the inclusion of the environment.TPE-MRh dispersed into 5×5 cm2 polymer films with a thickness of 25±5μm has revealed a partial fluorescence quenching with fluorophore content.Quantum yields(QYs)below 10%for the 2 wt.%of doping have been addressed to the formation of less emissive micro-sized clusters of fluorophores.PMMA slabs with the same surface size but 3 mm of thickness and 200 ppm of TPE-MRh have provided QY of 36.5%thanks to the attenuation of the detrimental effects of fluorophore aggregation.This feature is reflected in the LSCs performance,with devices achieving the largest power collected by the photovoltaic cell.

关 键 词：aggregation-induced enhanced emission density functional theory luminescent solar concentrators poly(methyl methacrylate) tetraphenylethylene core 

分 类 号：O62[理学—有机化学]