Intermolecular states in organic dye dispersions: excimers vs. aggregates

被引：71

作者：

Musser, A. J. ^{[1
]}

Rajendran, S. K. ^{[2
]}

Georgiou, K. ^{[1
]}

Gai, L. ^{[3
]}

Grant, R. T. ^{[1
]}

Shen, Z. ^{[3
]}

Cavazzini, M. ^{[4
]}

Ruseckas, A. ^{[2
]}

Turnbull, G. A. ^{[2
]}

Samuel, I. D. W. ^{[2
]}

Clark, J. ^{[1
]}

Lidzey, D. G. ^{[1
]}

机构：

[1] Univ Sheffield, Dept Phys & Astron, Sheffield, S Yorkshire, England

[2] Univ St Andrews, Organ Semicond Ctr, SUPA, Sch Phys & Astron, St Andrews, Fife, Scotland

[3] Nanjing Univ, Collaborat Innovat Ctr Adv Microstruct, State Key Lab Coordinat Chem, Nanjing 210093, Jiangsu, Peoples R China

[4] CNR, ISTM, Via C Golgi 19, I-20133 Milan, Italy

来源：

JOURNAL OF MATERIALS CHEMISTRY C | 2017年 / 5卷 / 33期

基金：

英国工程与自然科学研究理事会;

关键词：

DIPYRROMETHENEBORON DIFLUORIDE BODIPY; FREQUENCY UP-CONVERSION; SPECTROSCOPIC PROPERTIES; ENERGY-TRANSFER; DIMERS; DERIVATIVES; FLUORESCENT; EMISSION; PHOTOLUMINESCENCE; LUMINESCENCE;

D O I：

10.1039/c7tc02655b

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Rapid excited-state quenching in the solid state is a widespread limitation for organic chromophores. Even when molecules are dispersed in neutral host matrices, photoluminescence quantum yields decrease sharply with increased concentration, pointing to efficient intermolecular non-radiative decay pathways that remain poorly understood. Here we study the nature of the intermolecular states formed in dispersions of the prototypical BODIPY dyes. Using temperature-dependent and time-resolved photoluminescence measurements, we describe the processes of energy transfer into excimer states and, in materials with suitable chemical structure, excitonically coupled dimers. These dimer states exhibit remarkable near-unity quantum yield.

引用

页码：8380 / 8389

页数：10

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