POLARON-PAIR GENERATION IN POLY(PHENYLENE VINYLENES)

被引：288

作者：

FRANKEVICH, EL

LYMAREV, AA

SOKOLIK, I

KARASZ, FE

BLUMSTENGEL, S

BAUGHMAN, RH

HORHOLD, HH

机构：

[1] UNIV MASSACHUSETTS,DEPT POLYMER SCI & ENGN,AMHERST,MA 01003

[2] TH LEIPZIG,O-7030 LEIPZIG,GERMANY

[3] ALLIED SIGNAL INC,RES & TECHNOL,MORRISTOWN,NJ 07962

[4] UNIV JENA,FAC CHEM,O-6900 JENA,GERMANY

来源：

PHYSICAL REVIEW B | 1992年 / 46卷 / 15期

关键词：

D O I：

10.1103/PhysRevB.46.9320

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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.

引用

页码：9320 / 9324

页数：5

共 29 条

[1] PRECURSOR-ROUTE POLY(P-PHENYLENEVINYLENE) - POLYMER CHARACTERIZATION AND CONTROL OF ELECTRONIC-PROPERTIES [J].