Publication: Efficient green phosphorescent tandem organic light emitting diodes with solution processable mixed hosts charge generating layer
Date
2014
Authors
Talik N.A.
Yeoh K.H.
Ng C.Y.B.
Yap B.K.
Woon K.L.
Journal Title
Journal ISSN
Volume Title
Publisher
Elsevier
Abstract
A novel solution processable charge generating layer (CGL) that consists of 1,4,5,8,9,11-hexaazatriphenylene hexacarbonitrile (HATCN6)/Poly(N- vinylcarbazole) (PVK): 1,1-bis-(4-bis(4-tolyl)-aminophenyl) cyclohexene (TAPC) for a tandem green phosphorescent organic light emitting diode (PHOLED) is demonstrated. The use of orthogonal solvent to dissolve HATCN6 and PVK:TAPC is the key to overcome the interface erosion problem for the solution processed CGL. The current efficiency of the 2 wt% TAPC mixed with PVK is the highest at 24.2 cd/A, which is more than three-folds higher than that of the single device at 1000 cd/m2. © 2014 Elsevier B.V.