화학공학소재연구정보센터
학회 한국공업화학회
학술대회 2019년 가을 (10/30 ~ 11/01, 제주국제컨벤션센터(ICC JEJU))
권호 23권 2호
발표분야 (특별세션) (한양대 김희택 교수 정년 기념)나노물질 기반 융합신산업 기술동향
제목 Highly Efficient Fluorescent Blue-light Emitter with Long Device Lifetime
초록 In this study four emitters of blue light are synthesized by selecting pyrene, with its high photoluminescence quantum yield (PLQY), as the core group and variants of the electron-donating diphenylamine (DPA) as side groups. The four compounds have different numbers, sizes, and substitution positions of alkyl groups on the DPA. Each of the four compounds when doped in OLED devices shows a high current efficiency (CE) of over 7 cd A-1 and a high external quantum efficiency (EQE) of over 7.5%. In addition, the compounds yield electroluminescence (EL) spectra showing peaks with narrow full width at half maximum (FWHM) values of 37-40 nm and hence indicative of high color purity. Moreover, one compound shows a very high EQE of 9.25% and a very long lifetime, with an LT95 of 471 h.
저자 박종욱
소속 경희대
키워드 OLEDs; Blue emitters; long liftetime
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