Time-resolved study of luminescence in highly luminescent disubstituted polyacetylene and its blend with poorly luminescent monosubstituted polyacetylene

被引：49

作者：

Hidayat, R

Tatsuhara, S

Kim, DW

Ozaki, M

Yoshino, K

Teraguchi, M

Masuda, T

机构：

[1] Osaka Univ, Fac Engn, Dept Elect Engn, Suita, Osaka 5650871, Japan

[2] Kyoto Univ, Fac Engn, Div Polymer Chem, Sakyo Ku, Kyoto 6068317, Japan

来源：

PHYSICAL REVIEW B | 2000年 / 61卷 / 15期

关键词：

D O I：

10.1103/PhysRevB.61.10167

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A highly luminescent disubstituted polyacetylene, poly(1-phenyl-2-p-n-butylphenylacetylene) (PDPA-nBu), and its blend with a poorly luminescent monosubstituted polyacetylene, poly(1-o-trimethylsilylphenylacetylene)(PPA-oSiMe(3)), are studied by time-resolved photoluminescence (PL) spectroscopy. In pure PDPA-nBu, PL intensity at short wavelength decays faster than that at long wavelength, whereas PL spectra exhibit a dynamic Stokes shift to longer wavelengths with time. In blends of PDPA-nBu/PPA-oSiMe(3), only PL originating from PDPA-nBu is observed, without contribution from PPA-oSiMe(3). The PL lifetime drastically decreases upon mixing a small amount of PPA-oSiMe(3) in PDPA-nBu. The PL characteristics of pure PDPA-nBu and its blend with PPA-oSiMe(3) are discussed in terms of lattice/vibrational relaxation of the excitonic state and exciton migration.

引用

页码：10167 / 10173

页数：7

共 37 条

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