Picosecond to millisecond photoexcitation dynamics in blends of C60 with poly(p-phenylene vinylene) polymers

被引：25

作者：

Frolov, SV ^{[1
]}

Lane, PA

Ozaki, M

Yoshino, K

Vardeny, ZV

机构：

[1] Univ Utah, Dept Phys, Salt Lake City, UT 84112 USA

[2] Osaka Univ, Fac Engn, Dept Elect Engn, Suita, Osaka 565, Japan

来源：

CHEMICAL PHYSICS LETTERS | 1998年 / 286卷 / 1-2期

关键词：

D O I：

10.1016/S0009-2614(98)00060-8

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 compare photoexcitation dynamics in films of pristine and C-60-mixed 2,5-dioctyloxy poly(p-phenylene vinylene) (DOQ-PPV) using ps transient and cw photoinduced absorption (PA), and PA-detected magnetic resonance (PADMR), We conclude that C-60 doping is relatively inefficient in DOO-PPV. Consequently, the instantaneous exciton photogeneration yield remains high (close to 1) even at high C-60 concentrations. However, as the C-60 concentration increases up to 10 molar percent, the stimulated emission lifetime and cw photoluminescence intensity decrease together by about an order of magnitude due to dissociation of the singlet excitons at C-60 related defect centers into intrachain polaron pairs, which were identified by PADMR. (C) 1998 Elsevier Science B.V.

引用

页码：21 / 27

页数：7

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