LUMINESCENCE AND MULTIPHONON RAMAN-SCATTERING EXCITED AT EXCITON-FORMING VIBRONIC ABSORPTION SUBBANDS IN TRANSPOLYACETYLENE

被引：3
|
作者：
WATANABE, T
KUBO, T
TAKEZOE, H
FUKUDA, A
机构：
[1] Department of Organic and Polymeric Materials, Tokyo Institute of Technology, Tokyo, 152, O-okayama, Meguro-ku
来源：
JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS | 1992年 / 31卷 / 2A期
关键词：
TRANSPOLYACETYLENE; MULTIPHONON RAMAN SCATTERING; NEAR-INFRARED LUMINESCENCE; EXCITON-FORMING VIBRONIC SUBBANDS; INHOMOGENEOUS DISTRIBUTION OF CONJUGATION LENGTHS;
D O I：
10.1143/JJAP.31.L102
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Resonance Raman scattering superimposed on near-infrared luminescence in trans-polyacelylene excited at 1.42 eV (876 nm) and 1.45 eV (854 nm) was observed using a Ti-sapphire laser. Cis- and trans-polyacetylenes were confirmed to behave quite similarly in optical and photocurrent responses, at least near their respective intrinsic absorption edges. Considerably clear vibronic triplet subbands appear in the reflection spectrum, and intense multiphonon Raman scattering occurs. The photocurrent excitation efficiency is practically zero at the absorption edge, and edge luminescence appears, although its yield is not high.
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页码：L102 / L105
页数：4
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