Alternating current light-emitting devices based on Langmuir-Blodgett films of a porphyrin derivative: space charges in device operation

被引：11

作者：

Chowdhury, A ^{[1
]}

Pal, AJ ^{[1
]}

机构：

[1] Indian Assoc Cultivat Sci, Dept Solid State Phys, Kolkata 700032, W Bengal, India

来源：

THIN SOLID FILMS | 2001年 / 385卷 / 1-2期

关键词：

alternating current light-emitting devices Langmuir-Blodgett films; organic semiconductors; space charges; transient electroluminescence;

D O I：

10.1016/S0040-6090(01)00753-2

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Light-emitting devices based on a molecularly thin film of a porphyrin derivative have been fabricated and operated under sinusoidal alternating voltage. The general frequency response of luminance of such devices has been studied and compared with device characteristics under direct current mode. Space charge-assisted electron injection has been found to be operative under ac modes. Transient characteristics of electroluminescence have been studied to explain the frequency response in these devices. Frequency response of luminance further showed that ac light of 400 kHz can be obtained from these molecularly thin devices. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：266 / 270

页数：5

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