Ultrafast luminescence in Ir(ppy)3

被引：98

作者：

Hedley, Gordon J. ^{[1
]}

Ruseckas, Arvydas ^{[1
]}

Samuel, Ifor D. W. ^{[1
]}

机构：

[1] Univ St Andrews, Sch Phys & Astron, SUPA, Organ Semicond Ctr, St Andrews KY16 9SS, Fife, Scotland

来源：

CHEMICAL PHYSICS LETTERS | 2008年 / 450卷 / 4-6期

基金：

英国工程与自然科学研究理事会;

关键词：

D O I：

10.1016/j.cplett.2007.11.028

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A femtosecond luminescence and transient absorption study of fac-tris(2-phenylpyridine) iridium(III) [Ir(ppy)(3)] is reported. An emission with a lifetime component of 230 fs in the spectral region 500-560 nm is assigned to the population equilibration between electronic substates of the lowest excited triplet state, with energy dissipation by intramolecular vibrational redistribution. At shorter wavelengths a strong emission with a faster decay was observed and is attributed to a state with a higher admixture of singlet character. A slower decay on a 3 ps time scale is attributed to vibrational cooling. The results contribute to an understanding of the photophysics of transition metal complexes. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：292 / 296

页数：5

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