纳米晶体-聚合物复合材料的能量转移动力学

Energy transfer dynamics of nanocrystal-polymer composites.

作者信息

Warner Jamie H, Watt Andrew R, Thomsen Elizabeth, Heckenberg Norman, Meredith Paul, Rubinsztein-Dunlop Halina

机构信息

Center for Biophotonics and Laser Science, Center for Quantum Computer Technology, School of Physical Sciences, The University of Queensland, Brisbane, QLD 4072, Australia.

出版信息

J Phys Chem B. 2005 May 12;109(18):9001-5. doi: 10.1021/jp044531b.

DOI:10.1021/jp044531b

PMID:16852072

Abstract

Steady-state and time-resolved photoluminescence spectroscopy are used to examine the photoluminescent properties of nanocrystal-polymer composites consisting of colloidal PbS nanocrystals blended with poly(2-methoxy-5(2-ethylhexyloxy)-p-phenylene vinylene). Quenching of the emission from the conjugated polymer due to the PbS nanocrystals is observed along with band edge emission from the ligand capped PbS nanocrystals. A decrease in the photoluminescence lifetime of MEH-PPV is also observed in the thin film nanocrystal-polymer composite materials. Photoluminescence excitation spectroscopy of the PbS nanocrystal emission from the composite shows features attributed to MEH-PPV providing evidence of a Förster transfer process.

摘要

稳态和时间分辨光致发光光谱法用于研究由胶体硫化铅纳米晶体与聚（2-甲氧基-5（2-乙基己氧基）-对苯撑乙烯撑）混合而成的纳米晶体-聚合物复合材料的光致发光特性。观察到由于硫化铅纳米晶体导致的共轭聚合物发射猝灭，以及配体包覆的硫化铅纳米晶体的带边发射。在薄膜纳米晶体-聚合物复合材料中也观察到了MEH-PPV光致发光寿命的降低。复合材料中硫化铅纳米晶体发射的光致发光激发光谱显示出归因于MEH-PPV的特征，这为Förster转移过程提供了证据。