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| Type |
Symposium |
| Area |
Recent Trends in Organometallic Chemistry |
| Room No. |
Room 401+402 |
| Time |
FRI 09:20-09:40 |
| Code |
INOR2-2 |
| Subject |
Strategic Molecular-Design for High Chemical-Stability of Blue Phosphors in OLEDs |
| Authors |
Kang Mun Lee
Department of Chemistry, Kangwon National University, Korea |
| Abstract |
Organic electroluminescent devices (OLEDs) were first reported by Tang and VanSlyke in 1987. They have since received a great deal of scientific, industrial, and commercial attention because of their latent capabilities, such as excellent brightness, fast response time, low turn-on voltage, and wide viewing angle, which make them suitable to use as full-colour displays and flexible light sources. In order to ensure the high quantum efficiency of full-colour organic light-emitting diode (OLED) devices, it is essential to develop phosphorescent luminophores that emit pure red, green, and blue colours with high electrochemical stability and radiative efficiency. Although several Ir(III)-cyclometalates that exhibit pure red and green phosphorescence with excellent performance, markedly high efficiency, and long lifetime have been developed for use in OLEDs, it is necessary to introduce further improvements in the quantum efficiency and lifetime of OLED devices based on blue phosphorescent luminophores, which currently show relatively poorer chemical and electrochemical properties due to their intrinsic wide band gap. In this presentation, specific strategy for enhancing high chemical-stability of blue phosphores, which can be applicable to commercialization in OLEDs, will be shown. In addition, systematically designed and synthesized two phenyl-imidazole-moiety-based iridium complexes will be presented as an example, which can lead to an increased energy band-gap and enhanced blue emissive performance, especially long device lifetime. |
| E-mail |
kangmunlee@kangwon.ac.kr |
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123rd General Meeting of the KCS