Long-range excitons in optical absorption spectra of electroluminescent polymer poly(para-phenylenevinylene)

被引：6
|
作者：
Harigaya, K
机构：
来源：
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 1997年 / 66卷 / 05期
关键词：
excitons; electroluminescent polymer; poly(para-phenylenevinylene); electron-electron interactions; optical absorption; photocurrents; theory;
D O I：
10.1143/JPSJ.66.1272
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The component of photoexcited states with large spatial extent is investigated for poly(para-phenylenevinylene) using the intermediate exciton theory. We find a peak due to long-range excitons at the higher-energy side of the lowest main feature of optical spectra. The fact that the onset of long-range excitons is located near the energy gap is related to the mechanisms of large photocurrents measured in such energy regions. We show that a large value of the hopping integral is realistic for characterizing optical excitations.
引用
收藏
页码：1272 / 1275
页数：4
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