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학술지 Solution-Processible Blue-Light-Emitting Polymers Based on Alkoxy-Substituted Poly(Spirobifluorene)
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저자
이정익, 추혜용, 이효영, 오지영, 도이미, 정태형, 이재민, 심홍구
발행일
200504
출처
ETRI Journal, v.27 no.2, pp.181-187
ISSN
1225-6463
출판사
한국전자통신연구원 (ETRI)
DOI
https://dx.doi.org/10.4218/etrij.05.0104.0125
협약과제
04MB2400, Flexible 디스플레이 (차세대 디스플레이 기술 개발), 강광용
초록
Alkoxy-substituted poly(spirobifluorene)s and their copolymers with a triphenylamine derivative have been synthesized by Ni(0)-mediated polymerization. The polymers were well soluble in common organic solvents. Pure blue-light emissions without the long wavelength emission of poly(fluorene)s have been observed in the fluorescence spectra of polymer thin films. The fight emitting diodes with a device configuration of ITO/PEDT:PSS(30 nm)/polymer(60 nm)/LiF(1 nm)/Al(100 nm) have been fabricated. The electroluminescence spectra showed the blue emissions without the long wavelength emission as observed in the fluorescence spectra. The relatively poor electroluminescence quantum yield of the homopolymer (0.017%@20 mA/cm2) with color coordinates of (0.16,0.07) has been improved by the introduction of triphenylamine moiety, and the copalymer with triphenylamine derivative exhibited an electroluminescence quantum yield of 0.15% at 20 mA/cm2 with color coordinates of (0.16, 0.08). Moreover, the introduction of polar side chains to the spirobifluorene moiety enhanced the device performance and led to the quantum yields of 0.6 to 0.7% at 20 mA/cm2, although there was some expense of color purities.
키워드
Display, PLED, Poly(fluorine), Spirobifluorene
KSP 제안 키워드
Blue light-emitting, Device configuration, Electroluminescence spectra, Emitting diodes, Light-emitting polymers, Polymer thin film, Quantum yields(QYs), Triphenylamine derivative, color coordinates, device performance, fluorescence spectra