51-1 / H.-I. Baek
IMID 2009 DIGEST •
Conduction properties of phosphorescent emitting layers
and their application to optimizing white OLEDs
Heume-Il Baek, Seunguk Noh, Hyun Koo Lee, C.K.Suman and Changhee Lee
School of electrical engineering and Computer Science, Seoul National University
Phone:+82-2-880-9093, E-mail: [email protected]
Abstract
The mobility of charge carriers has been investigated in the pristine and phosphorescent materials doped host materials using time-of-flight photoconductivity technique. The field and temperature dependences of the mobility were analyzed with the Gaussian disorder model. Based on these results, we optimized white organic light emitting diodes (WOLEDs) consisting of multi-emitting layers doped with phosphorescent and fluorescent dopants. Especially, we studied the effect of each emitter position and an interlayer on the device characteristics of WOLEDs.
