Strong reduction of interchain interaction by bridged chain substitution in luminescent phenylenevinylene thin films

被引:41
作者
Chiavarone, L [1 ]
Di Terlizzi, M
Scamarcio, G
Babudri, F
Farinola, GM
Naso, F
机构
[1] Univ Bari, INFM, Dipartimento Interateneo Fis, I-70126 Bari, Italy
[2] Politecn Bari, I-70126 Bari, Italy
[3] Univ Bari, CNR, Ctr MISO, Dipartimento Chim, I-70126 Bari, Italy
关键词
D O I
10.1063/1.124913
中图分类号
O59 [应用物理学];
学科分类号
摘要
The strong reduction of interchain interaction in poly-(2,5-dialkoxy-1,4-phenylenevinylene) films with a 2,5 O-(CH2)(12)-O closed chain substitution (bridged PPV), engineered to reduce the molecular packing in the solid state, is reported. Evidence of this effect unambiguously stems from the systematic comparison between the optical properties of a series of dialkoxy-PPV derivatives with bridged and open chain side groups. Reduction of interchain energy relaxation channels explains the close similarity between the optical spectra of bridged-PPV films and solutions, the higher photoluminescence efficiency and the lower threshold for the observation of spectral line narrowing in the solid state. (C) 1999 American Institute of Physics. [S0003- 6951(99)04840-8].
引用
收藏
页码:2053 / 2055
页数:3
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