EXCITON FORMATION AND DECAY DYNAMICS IN ELECTROLUMINESCENT POLYMERS OBSERVED BY SUBPICOSECOND STIMULATED-EMISSION

被引：75

作者：

YAN, M

ROTHBERG, L

HSIEH, BR

ALFANO, RR

机构：

[1] XEROX CORP,WEBSTER RES CTR,WEBSTER,NY 14580

[2] CUNY,DEPT ELECT ENGN & PHYS,CTR ADV TECHNOL,INST ULTRAFAST SPECTROSCOPY & LASERS,NEW YORK,NY 10031

来源：

PHYSICAL REVIEW B | 1994年 / 49卷 / 14期

关键词：

D O I：

10.1103/PhysRevB.49.9419

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We observe stimulated exciton emission and Raman gain in stretch oriented poly(paraphenylenevinylene) (PPV) films with 200 fs resolution. The kinetics of stimulated emission of excitons show that excitons form and equilibrate within 200 fs after 500-nm photoexcitation with 100-fs laser pulses. Stimulated emission is not observed when higher energy photons are used to excite the polymer. The measured polarization and excitation wavelength dependence provide insight into the probability of exciton formation in PPV.

引用

页码：9419 / 9422

页数：4

共 23 条

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