DENSITIES OF STATES AND BAND WIDTHS OF EXCITONS IN ANTHRACENE MICROCRYSTALLITES EMBEDDED IN PMMA

被引：34

作者：

MATSUI, AH

MIZUNO, K

NISHI, O

MATSUSHIMA, Y

SHIMIZU, M

GOTO, T

TAKESHIMA, M

机构：

[1] TOHOKU UNIV,DEPT PHYS,SENDAI,MIYAGI 980,JAPAN

[2] TAKESHIMA LAB,FUKUI 911,JAPAN

来源：

CHEMICAL PHYSICS | 1995年 / 194卷 / 01期

关键词：

D O I：

10.1016/0301-0104(95)00024-I

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A new technique to determine the k = 0 components in the density of states (DOS) and band widths of excitons in microcrystallites is demonstrated. Applying the technique to anthracene microcrystallites, it is found that DOS shows up as a broad tail which extends towards higher energies, in addition to sharp peaks. The width of the tail, representing the exciton band width, takes its maximum value of 340 cm(-1) for microcrystallites of 65 Angstrom, but it becomes narrower as the size of microcrystallites reduces. For microcrystallites with a diameter larger than 65 Angstrom, the observed band width decreases asymptotically to 300 cm(-1), which represents the band width of a bulk crystal.

引用

页码：167 / 174

页数：8

共 9 条

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