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

Scientific paper - Original scientific paper

• Author: Eduard Tutiš
• Author: Ivo Batistić
• Author's institution: University of Zagreb; Faculty of Science; (Department of Physics)
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Physics

Abstract (english)

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.

• Keywords (english): organic-molecular devices; light-emitting diodes; filamentation; numerical simulations; degradation; ageing
• Language: english
• Publication type: Scientific paper - Original scientific paper
• Publication status: Published
• Peer review: Peer review
• Publication version: Published version
• Journal title: Fizika A
• Numbering: vol. 14, no. 2, pp. 167-178
• p-ISSN: 1330-0008
• URN:NBN: urn:nbn:hr:217:772796
• Publication: 2005
• Document URL: http://fizika.hfd.hr/fizika_a/av05/a14p167.htm
• Type of resource: Text
• Access conditions: Open access
• Created on: 2019-10-15 12:18:31