TEMPERATURE BEHAVIOR OF PHOTOLUMINESCENCE OF C60 DOPED BY THE SOL-GEL METHOD

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TEMPERATURE BEHAVIOR OF PHOTOLUMINESCENCE OF C₆0 DOPED BY THE SOL-GEL METHOD

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- TEMPERATURE BEHAVIOR OF PHOTOLUMINESCENCE OF C₆0 DOPED BY THE SOL-GEL METHOD
- Chinese Journal of Luminescence Vol. 17, Issue 4, Pages: 379-381(1996)
- 作者机构：
  
  1. 中国科学院长春物理研究所长春,130021
  2. 浙江大学材料科学工程系杭州,310027
  3. 中国科学院激发态物理开放研究实验室长春,130021
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：22 July 1996，
  
  Published：30 November 1996
- 稿件说明：
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吕少哲, 刘俊业, 陈一民, 向卫东, 丁子上. 用溶胶-凝胶法掺杂的C60光荧光的温度行为[J]. 发光学报, 1996,17(4): 379-381

Lü Shaozhe, Liu Junye, Chen Yimin, Xiang Weidong, Ding Zishang. TEMPERATURE BEHAVIOR OF PHOTOLUMINESCENCE OF C60 DOPED BY THE SOL-GEL METHOD[J]. Chinese Journal of Luminescence, 1996,17(4): 379-381
吕少哲, 刘俊业, 陈一民, 向卫东, 丁子上. 用溶胶-凝胶法掺杂的C60光荧光的温度行为[J]. 发光学报, 1996,17(4): 379-381 DOI：

Lü Shaozhe, Liu Junye, Chen Yimin, Xiang Weidong, Ding Zishang. TEMPERATURE BEHAVIOR OF PHOTOLUMINESCENCE OF C60 DOPED BY THE SOL-GEL METHOD[J]. Chinese Journal of Luminescence, 1996,17(4): 379-381 DOI：

摘要

在甲苯溶液和薄膜材料中C

的光荧光研究已有许多报导

但对用溶胶-凝胶方法掺杂的C

的发光的温度行为研究尚未见报道。中子衍射研究表明

在不同温度下C

有不同的结构:温度高于260K以上

的结晶结构是面心立方

并且分子总是在自由旋转。C

分子间的相互作用很弱

由范德瓦尔斯力键合。它们之间不会有能量的转移

因而固态的C

发光基本上是单个分子发光;温度低于260K

是简立方结构

在一个原胞中有四个分子。由于绕

111

方向上的98°的旋转而导致取向的不均匀性。经过一较长滞留时间后

在这个方向上的一个非常快的60°跳跃

又形成一新的取向。低于90K时

分子开始冻结在简立方晶格上。可见

的结构对温度有相当显著的依赖关系。研究C

的光致发光的温度行为是有意义的。

Abstract

The photoluminescence peaked at about 1.69 eV of C

doped by the sol-gel method was studied as a function of temperatures at 30-200 K. The peak positions were slightly shifted to red side and photoluminescence intensities were strongly decreased with increasing temperatures. A turning point in photoluminescence intensities-temperature curve was observed. The turning point was caused by the defects due to the thermal strain and the ratcheting motion of C

molecules. The activation energy of the photoluminescence centers

475 cm

-1

was obtained by fitting the experimental data.

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