Organic Electronics: Feel the Heat: Nonlinear Electrothermal Feedback in Organic LEDs (Adv. Funct. Mater. 22/2014). (June 2014)

• Record Type: Journal Article
• Authors: Fischer, Axel; Koprucki, Thomas; Gärtner, Klaus; Tietze, Max L.; Brückner, Jacqueline; Lüssem, Björn; Leo, Karl; Glitzky, Annegret; Scholz, Reinhard
• Is Part Of: Advanced functional materials. Volume 24:Number 22(2014)
• Page Start: 3366
• Page End: 3366
• Publication Date: 2014-06
• Subjects: Materials -- Periodicals; Chemical vapor deposition -- Periodicals; 620.11
• DOI: 10.1002/adfm.201470145
• Languages: English
• ISSNs: 1616-301X

Abstract

<abstract abstract-type="graphical" xml:lang="en" id="adfm201470145-abs-0001"> <title> <x xml:space="preserve">Abstract</x> </title> <p>On page 3367 A. Fischer and co‐workers investigate the brightness inhomogeneity of organic light‐emitting diodes (OLEDs) under Joule self‐heating. The presence of S‐shaped negative differential resistance is revealed unambiguously by 4‐wire crossbar measurements. In specific voltage regimes, the voltage and current distribution in the OLED produces regions where a declining voltage propagates laterally through the device. As a consequence, brightness inhomogeneities are amplified, producing even regions where current and luminance diminish in an upwards sweep of the applied external voltage. <boxed-text content-type="graphic" position="anchor" orientation="portrait"><graphic position="anchor" mimetype="image" xlink:href="ark:/27927/pghh51ts8s" orientation="portrait" xlink:type="simple" xmlns:xlink="http://www.w3.org/1999/xlink" /></boxed-text></p> </abstract>