Transient Grating Photoluminescence Spectroscopy: An Ultrafast Method of Gating Broadband Spectra

被引:54
作者
Chen, Kai
Gallaher, Joseph K.
Barker, Alex J.
Hodgkiss, Justin M. [1 ]
机构
[1] MacDiarmid Inst Adv Mat & Nanotechnol, Wellington 6010, New Zealand
来源
JOURNAL OF PHYSICAL CHEMISTRY LETTERS | 2014年 / 5卷 / 10期
关键词
RESOLVED FLUORESCENCE SPECTROSCOPY; ENERGY-TRANSFER DYNAMICS; UP-CONVERSION; INTERNAL-CONVERSION; SOLVATION DYNAMICS; FEMTOSECOND; RELAXATION; GATE; SNAPSHOTS; DNA;
D O I
10.1021/jz5006362
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
Ultrafast photoluminescence (PL) spectroscopy can cleanly resolve excited-state dynamics and coupling to the environment, however, there is a demand for new methods that combine broadband detection and low backgrounds. We present a new method, transient grating photoluminescence spectroscopy (TGPLS), that addresses this challenge by exploiting a focusing geometry where ultrafast broadband spectra are transiently diffracted away from the background PL. We show that TGPLS can resolve the complex spectral relaxation observed in conjugated polymer and oligomer solutions, with an essentially flat spectral response throughout the visible region and potentially beyond. The benefits we demonstrate using TGPLS could expand access to spectral information, particularly for other multichromophoric and heterogeneous materials where complex spectral relaxation is expected.
引用
收藏
页码:1732 / 1737
页数:6
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