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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/27463

Title: Exciton dissociation and migration in enhanced order conjugated polymer/nanoparticle hybrid materials
Authors: Yun-Yue Lin;Chun-Wei Chen;J Chang;T Y Lin;I S Liu;Wei-Fang Su
Contributors: NTOU:Institute of Optoelectronic Sciences
Date: 2006-03-14
Issue Date: 2011-10-21T02:31:52Z
Publisher: Nanotechnology
Abstract: Abstract:The mechanisms of exciton dissociation and migration in the conjugated polymer (poly(2-methoxy-5-(2'-ethyl)(hexyloxy)1,4-phenylenevinylene))(MEH-PPV)/CdSe nanoparticle hybrid materials were investigated by steady-state and time-resolved photoluminescence spectroscopy. Rapid exciton dissociation at the nanoparticle/polymer interfaces, leading to quenching of the photoluminescence efficiency η and shortening of the measured lifetime τPL, is observed. The excitons which contribute to the remaining luminescence in the polymer migrate to the lower energy sites with longer conjugated sequences in the composites. The result is further evident from the observation of a redshift of the photoluminescence peak positions, a progressive decrease of the Huang–Rhys factor S and an increase in the natural radiative lifetime τR with increasing CdSe nanoparticle content.
Relation: 17(5), pp.1260-1263
URI: http://ntour.ntou.edu.tw/handle/987654321/27463
Appears in Collections:[光電科學研究所] 期刊論文

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