Accurate measurement of the exciton diffusion length in a conjugated polymer using a heterostructure with a side-chain cross-linked fullerene layer

被引：360
|
作者：
Markov, DE [1 ]
Amsterdam, E
Blom, PWM
Sieval, AB
Hummelen, JC
机构：
[1] Univ Groningen, Ctr Mat Sci, NL-9747 AG Groningen, Netherlands
[2] Biomad Technol Fdn, NL-9747 AG Groningen, Netherlands
来源：
JOURNAL OF PHYSICAL CHEMISTRY A | 2005年 / 109卷 / 24期
关键词：
D O I：
10.1021/jp0509663
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：
Exciton diffusion and photoluminescence quenching in conjugated polymer/fullerene heterostructures are studied by time-resolved photoluminescence. It is observed that heterostructures consisting of a spin-coated poly(p-phenylene vinylene) (PPV)-based derivative and evaporated C-60 are ill-defined because of diffusion of C60 into the polymer, leading to an overestimation of the exciton diffusion length. This artifact is resolved by the use of a novel, thermally side-chain polymerizing and cross-linking fullerene derivative (F2D) containing two diacetylene moieties, forming a completely immobilized electron acceptor layer. With this heterostructure test system, an exciton diffusion length of 5 +/- 1 nm is derived for this PPV derivative from time-integrated luminescence quenching data.
引用
收藏
页码：5266 / 5274
页数：9
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