Femtosecond regular reflection spectroscopic study on ultrafast photoinduced heat generation in copper phthalocyanine solid

被引：10

作者：

Hosokawa, Y ^{[1
]}

Watanabe, K ^{[1
]}

Asahi, T ^{[1
]}

Fukumura, H ^{[1
]}

Masuhara, H ^{[1
]}

机构：

[1] Osaka Univ, Dept Appl Phys, Suita, Osaka 5650871, Japan

来源：

BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN | 1999年 / 72卷 / 05期

关键词：

D O I：

10.1246/bcsj.72.909

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A femtosecond regular reflection spectroscopic system was developed and applied to a P-copper phthalocyanine (beta-CuPc) pellet. Transient regular reflection spectra were converted into extinction coefficient change (Delta k) ones, which correspond to transient absorption spectra, by using Kramers-Kronig transformation. The Delta k spectrum observed immediately after excitation was assigned to the excited state of beta-CuPc solid, which relaxed by an exciton-exciton annihilation. The spectra remaining over several nanoseconds were assigned to a hot band due to a vibrationally excited state of the electronically ground state. We have clarified that a fast photothermal conversion process is induced by the exciton-exciton annihilation, which was analyzed by a simulation using a time dependent rate (proportional to t(-1/2)) of the annihilation.

引用

页码：909 / 914

页数：6

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