TRANSIENT SPECTROSCOPY OF EXCITONS AND POLARONS IN C-60 FILMS FROM FEMTOSECONDS TO MILLISECONDS

被引：73

作者：

DICK, D

WEI, X

JEGLINSKI, S

BENNER, RE

VARDENY, ZV

MOSES, D

SRDANOV, VI

WUDL, F

机构：

[1] UNIV UTAH,DEPT ELECT ENGN,SALT LAKE CITY,UT 84112

[2] UNIV CALIF SANTA BARBARA,INST POLYMERS & ORGAN SOLIDS,SANTA BARBARA,CA 93106

来源：

PHYSICAL REVIEW LETTERS | 1994年 / 73卷 / 20期

关键词：

D O I：

10.1103/PhysRevLett.73.2760

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have studied photoexcitations in C60 films using transient photomodulation and photoluminescence from 100 fs to 50 ms and absorption-detected magnetic resonance (ADMR). We show that singlet Frenkel excitons are the primary photoexcitations; their recombination kinetics in the picosecond time domain are dispersive as a result of inhomogeneity. The long-lived photoexcitations, however, are shown to be triplet excitons and charged polarons (C60±), identified by the correlation found between their associated optical transitions and ADMR signals with spin 1 and 1/2, respectively. © 1994 The American Physical Society.

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页码：2760 / 2763

页数：4

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