Mean free time for excimer light emission in conjugated polymers

被引：53

作者：

Conwell, EM ^{[1
]}

机构：

[1] Univ Rochester, Dept Chem, Ctr Photoinduced Charge Transfer, Rochester, NY 14627 USA

[2] Xerox Corp, Wilson Ctr Res & Technol, Webster, NY 14580 USA

来源：

PHYSICAL REVIEW B | 1998年 / 57卷 / 22期

关键词：

D O I：

10.1103/PhysRevB.57.14200

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We show that the long mean free time for light emission from excimers in poly(phenylene vinylene), PPV, and its derivatives, compared to that for excitons in these materials, is due to the transition from the excimer state to the ground state being forbidden due to like parity. A finite transition probability is nevertheless obtained due to the thermal vibrations, which mix in states of odd parity. We estimate the mean free time for excimer emission in cyano-poly(phenylene vinylene), CN-PPV. We find:it Likely to be much longer than previously considered.

引用

页码：14200 / 14202

页数：3

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