A Study on Single-Layered White Organic Light-Emitting Diodes Based on Co-Host System Using Solution Process
Abstract:Two color white organic light-emitting diode (WOLED) that used a co-host system in a solution process method was prepared. A device configuration is ITO/PEDOT:PSS (40 nm)/emitting layer(50 nm)/TPBi (20 nm)/LiF (1 nm)/Al. The emitting layer consists of TATa + α-NPB or β-NPB + DPAVBi (blue dopant) + Rubrene (yellow dopant). The device using α-NPB or β-NPB showed white color of CIE (0.30, 0.40) and (0.29, 0.39), respectively. Device efficiency of α-NPB was 3.85 cd/Aat 100 mA/cm2, which is about 15% higher than β-NPB's.
Document Type: Research Article
Publication date: 2011-08-01
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