Date

Place

[P2-112]
14:00 ~ 15:30
Title:Effect of Green Emitter on Device Characteristics of Solution-Processed White Organic Light-Emitting Diodes
Seul Bee Lee and Jaemin Lee (KRICT, Korea)
Abstract: OLED(Organic light-emitting diode) lighting is an emerging solid-state lighting technology. OLED lighting is close to the natural light then traditional lighting. It is eco-friendly technology because it produces little or no heat and contains no heavy metals like lead and mercury. OLED lighting is thin, light, and it can be flexible. So it can be produced as a variety of shapes. The solution process is lower cost and easier for lager area deposition than the vacuum deposition. However, high solubility to the organic solvents is required for organic materials. To make perfect white light, it is recommended that the emission spectrum covers all of visible light region. However, the green emission peak is closer to the blue emission peak than red emission peak. We compared the effect of variation of green emitter in solution-processed phosphorescent white OLEDs. We choose iridium complex with silyl substituent that provides increased solubility. And, this complex has more red-shifted emission than pure green emitter, which would be beneficial to achieve high-quality white emission. Also, the J-V-L characteristics of white OLEDs show the better device performance than pure green emitter, Ir(mppy)3.
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