Journal
DYES AND PIGMENTS
Volume 136, Issue -, Pages 390-397Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.dyepig.2016.08.060
Keywords
Flexible organic light-emitting diode; Homoleptic Ir(III) complex; Deep-red emission; Polarizability; External quantum efficiency; Transparent conducting electrode
Funding
- Pusan National University Grant
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Highly efficient conventional and flexible deep-red phosphorescent OLEDs (PhOLEDs) were developed by using glass (substrate)/indium tin oxide (ITO, transparent conducting electrode, TCE) and polyethylene naphthalate (PEN, substrate)/silver nanowire (AgNW, TCE). A thiophene-phenylquinoline (Th-PQ)-based Ir(III) complex, (Th-PQ)(3)Ir, which has already been confirmed as a promising emitter in solution processed PhOLEDs, and a new selenophene-PQ (Se-PQ)-based Ir(III) complex, (Se-PQ)(3)Ir, were verified as emitters in conventional and flexible PhOLEDs. Both (Th-PQ)(3)Ir and (Se-PQ)(3)Ir exhibited bright red emission (601 nm and 614 nm) in chloroform at room temperature. (Th-PQ)(3)Ir showed excellent performance not only in solution-processed devices but also in the conventional and flexible PhOLEDs fabricated by vapor deposition. (Th-PQ)(3)Ir exhibited a maximum external quantum efficiency (EQE) of 19.83% and 21.33% in conventional and flexible PhOLEDs, respectively, with stable deep-red CIE coordinates (0.66, 034). (C) 2016 Elsevier Ltd. All rights reserved.
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