TRANSIENT PHOTOCONDUCTIVITY OF ACCEPTOR-SUBSTITUTED POLY(3-BUTYLTHIOPHENE)
TRANSIENT PHOTOCONDUCTIVITY OF ACCEPTOR-SUBSTITUTED POLY(3-BUTYLTHIOPHENE)
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受体取代的聚(3-丁基噻吩)的瞬态光导性
DOI：
10.1021/ja953762g
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发表时间：
1996
影响因子：
15
通讯作者：
D. Davidov
中科院分区：
文献类型：
--
作者：
Y. Greenwald;G. Cohen;J. Poplawski;E. Ehrenfreund;S. Speiser;D. Davidov
我们研究了受主取代的聚(3-丁基噻吩基)，试图通过测量脉冲激发后的瞬时光电导响应来考察受主分子在光激发下作为本征电荷陷阱的作用。专门合成的受体分子是化学合成的高电子亲和力(HEA)单体1-(4-硝基苯基)-2-(3-噻吩基)乙烯。在用这种受体单体制备的共聚物中，我们观察到随着取代的聚丁基噻吩基浓度的增加，亚纳秒光电导降低和慢组分(t>；10 ns)光电导增加的同时，慢组分被认为是一个双分子复合过程。
We have studied acceptor-substituted poly(3-butylthiophene) in an attempt to examine the role of acceptor molecules as intrinsic charge traps under light excitations by measuring the transient photoconductivity response following pulse excitation. The specially synthesized acceptor molecule is a chemically prepared high electron affinity (HEA) monomer, 1-(4-nitrophenyl)-2-(3-thienyl)ethene. In the copolymers prepared with this acceptor monomer we have observed simultaneous decrease of the sub-nanosecond photoconductivity and increase of the slow component (t> 10 ns) photoconductivity, with increasing HEA group concentration in the substituted poly(butylthiophene)s. The slow component is attributed to a bimolecular recombination process.