POLARON-PAIR GENERATION IN POLY(PHENYLENE VINYLENES)
POLARON-PAIR GENERATION IN POLY(PHENYLENE VINYLENES)
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DOI：
10.1103/physrevb.46.9320
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发表时间：
1992-10-15
影响因子：
3.7
通讯作者：
HORHOLD, HH
中科院分区：
文献类型：
--
作者：
FRANKEVICH, EL;LYMAREV, AA;HORHOLD, HH
在 130-350 K 的温度范围内，观察到弱磁场对聚对亚苯基亚乙烯基 (PPV) 及其两种衍生物聚(1,4-亚苯基-1,2-二甲氧基亚乙烯基) (DMOP-PPV) 和聚(2-苯基-1,4-亚苯基亚乙烯基) (PPPV) 光电导性的影响。这些影响是 归因于涉及负极化子和正极化子的链间对的形成。极化子对是由于分子激子的链间电子转移而形成的。一对的寿命估计在 10(-8)-10(-9)s 范围内。极化子对的热解离产生自由电荷载流子，并且该对的重组在链的单个共轭段上再生单线态或三线态激子。
The effects of weak magnetic fields on the photoconductivity of poly(p-phenylene vinylene) (PPV) and two derivatives, poly(1,4-phenylene-1,2-dimethoxyphenyl vinylene) (DMOP-PPV) and poly(2-phenyl-1,4-phenylene vinylene) (PPPV), were observed within the temperature range 130-350 K. These effects are attributed to the formation of interchain pairs involving a negative polaron and a positive polaron. A polaron pair is formed as a result of interchain electron transfer from a molecular exciton. The lifetime of a pair is estimated to be within the range of 10(-8)-10(-9)s. Thermal dissociation of a polaron pair produces free charge carriers, and recombination of the pair regenerates a singlet or triplet exciton on a single conjugated segment of a chain.