Hybrid White Organic Light Emitting Diodes Using Dual Core Blue Fluorescent Emitter
White OLED (WOLED) devices were fabricated using blue emitting materials, TP-AA-TP, TP-AA-TPB, and TPB-AA-TPB, and yellow emitting material polyphenylenevinylene derivative (PDY 132). Three devices were fabricated with the following structure: ITO/PEDOT:PSS (50 nm)/PDY-132 (40 nm)/NPB (10 nm)/Blue EML (30 nm)/Alq3 (20 nm)/LiF (1 nm)/Al (200 nm). PDY-132 was used by spin coating, and then three blue fluorescent materials were used by vapor deposition to form a white light emitting device. The color coordinates of WOLED using TP-AA-TP, TP-AA-TPB and TPB-AA-TPB were (0.291, 0.317), (0.317, 0.371) and (0.345, 0.457), respectively. Device using TP-AA-TP as blue emitting material showed the highest efficiencies at 10 mA/cm2, L.E of 5.58 cd/A, P.E of 2.16 lm/W and E.Q.E of 2.96%.
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Document Type: Research Article
Affiliations: Department of Chemical Engineering, Kyung Hee Univeristy, Yongin, 17104, Korea
Publication date: February 1, 2019
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