Experimental proof of Joule heating-induced switched-back regions in OLEDs.

ABSTRACT: Organic light-emitting diodes (OLEDs) have become a major pixel technology in the display sector, with products spanning the entire range of current panel sizes. The ability to freely scale the active area to large and random surfaces paired with flexible substrates provides additional application scenarios for OLEDs in the general lighting, automotive, and signage sectors. These applications require higher brightness and, thus, current density operation compared to the specifications needed for general displays. As extended transparent electrodes pose a significant ohmic resistance, OLEDs suffering from Joule self-heating exhibit spatial inhomogeneities in electrical potential, current density, and hence luminance. In this article, we provide experimental proof of the theoretical predicti

SUBMITTER: Kirch A 

PROVIDER: S-EPMC6954226 | biostudies-literature | 2020

REPOSITORIES: biostudies-literature