| 학회 | 한국고분자학회 |
| 학술대회 | 2004년 봄 (04/09 ~ 04/10, 고려대학교) |
| 권호 | 29권 1호, p.33 |
| 발표분야 | 복합재료 |
| 제목 | Fluorene based light-emitting polymers for PLEDs |
| 초록 | The development of new materials capable of displaying proper color with high efficiency and stability is essential for the development of a full color PLED. PPV derivatives and polyfluorene derivatives (PFs) are well known as promising materials suitable for practical applications. PPV and its derivatives have attracted much attention because of their optical and physical properties, and many attempts have been made to improve the performance of electroluminescent (EL) devices based on these polymers. Although all three primary colors (red, green, blue) have been produced in PLEDs, so far only the yellow-orange color emitting devices have demonstrated device performances that are suitable for commercial use. Recently, more attention has been paid to poly(fluorene)s (PFs) for use as the emissive layer of light-emitting diodes than to PPV derivatives because of their high photoluminescence (PL) quantum efficiency, thermal stability, and also their facile color tunability, which can be obtained by introducing low-band-gap comonomers. The poor efficiency of the polyfluorene homopolymer has been improved by blending, copolymerization, and by end-capping with charge transporting materials in order to achieve efficient charge injection. In spite of many advantages of PFs, the emission of long-wavelength radiation by polymer films comprising PFs upon heating during device formation or operation has been the crucial problem for practical applications. The origin of long-wavelength emissions of poly(alkylfluorene) is not yet clear. Both the excimer and keto-defects may be responsible for the long-wavelength emissions. In this presentation, synthesis and light-emitting properties of high performance polyfluorene derivatives, and new approach to suppress the long wavelength additional emission of PFs will be discussed. |
| 저자 | 황도훈 |
| 소속 | 금오공과대 |
| 키워드 | polyfluorene; light-emitting diode; electroluminescence |
