EXCITONS AND BIEXCITONS IN POLY(PARA-PHENYLENEVINYLENE)

被引：3

作者：

CHANDROSS, M ^{[1
]}

GUO, F ^{[1
]}

MAZUMDAR, S ^{[1
]}

机构：

[1] UNIV ARIZONA,CTR OPT SCI,TUCSON,AZ 85721

来源：

SYNTHETIC METALS | 1995年 / 69卷 / 1-3期

关键词：

D O I：

10.1016/0379-6779(94)02595-P

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The Huckel model fails to describe optical absorption in PPV and its derivatives, and explicit inclusion of moderate electron-electron interactions is essential for a proper theoretical description. The lowest optical state is an exciton with a binding energy estimated as 0.90 +/- 0.15 eV, in excellent agreement with experiment. Such a large exciton binding energy strongly suggests stable biexcitons. The concept of biexcitons in pi-conjugated polymers is introduced, and picosecond photoinduced absorption is explained as excited state absorption from the exciton to the biexciton.

引用

页码：625 / 628

页数：4

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