Current filamentation and degradation in electronic devices based on amorphous organic layers

Tutiš, Eduard and Batistić, Ivo (2005) Current filamentation and degradation in electronic devices based on amorphous organic layers. Fizika A, 14 (2). pp. 167-178. ISSN 1330-0008

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Abstract

The recent advent of new flat-panel organic displays follows a long struggle for the extended device lifetime. Many modifications proposed along this way have been based on trial and error experimentation. In this paper, we show that some recent major improvements may have been implicitly related to fighting against the strong current filamentation, intrinsic for charge injection and conduction in organic amorphous thin films. We first recapitulate some major causes of current filamentation in thin amorphous organic layers. Then we consider the charge transport in devices with a high-mobility injection layer, with a smoothened organic heterojunction surface, that operate at lower electric fields, and the devices with doped transport layers. We show that these conditions, known to decrease the device degradation rates, may separately lead to the current homogenization in organic films.

Item Type: Article
Keywords: organic-molecular devices, light-emitting diodes, filamentation, numerical simulations, degradation, ageing
Date: 2005
Subjects: NATURAL SCIENCES > Physics
Divisions: Faculty of Science > Department of Physics
Publisher: Hrvatsko fizikalno društvo
Depositing User: Gordana Stubičan Ladešić
Date Deposited: 15 Apr 2014 17:38
Last Modified: 15 Apr 2014 17:38
URI: http://digre.pmf.unizg.hr/id/eprint/857

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