Suppression of the excimer photoluminescence in a poly(arylene-ethynylene) co-polymer

被引：15
作者：
Pizzoferrato, R
Ziller, T
Micozzi, A
Ricci, A
Lo Sterzo, C
Ustione, A
Oliva, C
Cricenti, A
机构：
[1] Univ Roma Tor Vergata, INFM, Dipartimento Ingn Meccan, I-00133 Rome, Italy
[2] Univ Roma La Sapienza, CNR, IMC, Ist CNR Metodol Chim,Dipartimento Chim, I-00185 Rome, Italy
[3] Univ Teramo, Dipartimento Sci Alimenti, I-64023 Teramo, Italy
[4] CNR, Ist Struttura Mat, I-00133 Rome, Italy
[5] Vanderbilt Univ, Dept Phys & Astron, Nashville, TN 37212 USA
来源：
CHEMICAL PHYSICS LETTERS | 2005年 / 414卷 / 1-3期
关键词：
D O I：
10.1016/j.cplett.2005.08.074
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：
We have investigated the optical properties of a pi-conjugated poly(arylene-ethynylene) co-polymer, the poly-{[(2,5-dioctyloxy)- 1,4-phenylene acetylene]-co-2,6-pyridylene acetylene}, in liquid solutions and blended films with nonconjugated polymers. The red-shifted emission from excimers strongly influences the photoluminescence of solid-state samples but it can be suppressed by using in-vacuum thermal ageing or photoirradiation. Experimental observations suggest this quenching is due to structural reorganization processes that still occur in blends within phase-separated regions of pure co-polymer. Significantly, the suppression of the excimer band does not affect the exciton blue emission in blends, which could help improve color purity for OLEDs and display applications. (c) 2005 Elsevier B.V. All rights reserved.
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收藏
页码：234 / 238
页数：5
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