Application of Copolymers Containing Fluorene, Triphenylamine Derivatives in PLED Devices
Date Issued
2009
Date
2009
Author(s)
Cheng, Yu-Shan
Abstract
In this thesis, the series of hole-injecting and hole-transporting materials are synthesized and characterized. The series is TRI-IPDI-SF series, triarylamine derivatives (denoted as TRI) and Spiro-fluorene derivatives (denoted as SF) linked by isophorone diisocyanate with different ratios to form a series of polyurehtanes (PU). These materials are applied in electroluminescent device as hole-injecting and hole-transporting layer to improve the performance. The devices are separated into two systems: . ITO/PEDOT:PSS/PU/Ir(ppy)3+t-PBD+PVK/Mg/Ag : PUs were applied in theevices and the devices were compared with the standard device S1:ITO/ PEDOT:PSS/Ir(ppy)3+t-PBD+PVK/Mg/Ag. The brightness was increased to 10030 cd/m2, the current efficiency rose to 27.9 cd/A and turn-on voltage was 12V (at 100 cd/m2), compared to 5190 cd/m2, 17.2 cd/A and 12.5 V in S1; and . ITO/PEDOT:PSS/PU+2.5 wt%P2M/Ir(ppy)3+t-PBD+PVK/Mg/Ag, compared to standard device S1: ITO/PEDOT:PSS/ Ir(ppy)3+t-PBD+PVK/Mg/Ag. The brightness of copolymer was increased to 8560 cd/m2, the current efficiency was up to 18 cd/A, compared to 5190 cd/m2 and 17.2 cd/A in S1.
Subjects
Fluorene
Triphenylamine
Type
thesis
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