Transient spectroscopy of Frenkel and charge transfer excitons in alpha-sexithienyl films

被引：35

作者：

Lanzani, G

Frolov, SV

Lane, PA

Vardeny, ZV

Nisoli, M

DeSilvestri, S

机构：

[1] IST NAZL FIS MAT,UNITA MILANO,I-20133 MILAN,ITALY

[2] UNIV UTAH,DEPT PHYS,SALT LAKE CITY,UT 84112

[3] POLITECN MILAN,DIPARTIMENTO FIS,CTR ELETTRON QUANTIST & STRUMENTAZ ELETTRON,I-20133 MILAN,ITALY

来源：

PHYSICAL REVIEW LETTERS | 1997年 / 79卷 / 16期

关键词：

D O I：

10.1103/PhysRevLett.79.3066

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Photoexcitations dynamics are investigated in alpha-sexithienyl nanocrystalline films using transient photomodulation in a spectral range from 0.4 to 2.5 eV and time domain from 200 fs to 50 ms. We identify intrachain and interchain excitations. The former are even parity excitons with ultrafast dynamics, whereas the latter are long-lived charge transfer excitons generated within 300 fs, which separate into uncorrelated polaron pairs in the submicrosecond time domain.

引用

页码：3066 / 3069

页数：4

共 30 条

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