| 학회 | 한국고분자학회 |
| 학술대회 | 2004년 가을 (10/08 ~ 10/09, 경북대학교) |
| 권호 | 29권 2호, p.109 |
| 발표분야 | 분자전자 부문위원회 |
| 제목 | Recent Advances in PLED and New Fluorene-based Copolymers for Red, Green, Blue, and White light emission |
| 초록 | This presentation covers both our recent work and recent advances/market in PLEDs. First of all, we have synthesized new various fluorine-based random and alternating copolymers and characterized their physical, optical, current-voltage-light intensity (IVL) relationships, and field-effect transistor (FET) properties. They have been shown good candidates for red, green, and white LEDs. For red light emitting polymers, we synthesized four new fluorene-based alternating polymers (PFR1-S, PFR2-S, PFR3-S, and PFR4-S) containing different comonomers (R1, R2, R3, and R4). Single layer LED devices fabricated from these polymers emitted bluish green to pure red light. Notably, PFR3-S and PFR4-S showed pure red emissions and good device performances. For green light emitting polymers, the fluorene- and thieno[3,2-b]thiophene-based copolymer, poly(9,9’-dioctylfluorene-alt-thieno[3,2-b]thiophene) (PFTT) was prepared, and the light-emitting properties and field-effect transistor (FET) performances were investigated. PFTT copolymer showed exact green light emission with high quantum efficiency. In FET properties, solution-processed thin film transistor (TFT) of PFTT copolymer was fabricated using the bottom contact geometry. The highest field effect mobility obtained with PFTT was 1.1x10-3cm2V-1s-1. For blue light emitting polymers, new POSS (polyhedral oligomeric silsesquioxane) substituted polyfluorenes (PFPOSSs) were synthesized. PFPOSSs showed very good fluorenscence quantum yields (ΦFL) and very stable blue light emission. For white light emitting polymers, we prepared very interesting copolymers (PFTPADCMs) composed of red, green, and blue monomers. The white light photo- and electroluminescence effects with the novel copolymer will be discussed as well as the synthetic route. Finally, the recent advances and market share in PLEDs will be presented, and the future of PLEDs will be predicted. References 1. Cho, N. S., Hwang, D. –H., Lee, J. –I., Jung, B. J., Shim, H. –K., Macromolecules, 35, 1224 (2002) 2. Lim, E., Jung, B. –J., Shim, H. –K., Macromolecules, 36, 4288 (2003). 3. Cho, N. S., Hwang, D. –H., Jung, B. J., Lim, E., Lee, J., Shim, H. –K., Macromolecules, 37, 5265 (2004). |
| 저자 | 조남성1, 임은희2, 이종희3, 이상규1, 심홍구2 |
| 소속 | 1Center for Advanced Functional Polymers, 2Department of Chemistry and School of Molecular Science (BK21), 3KAIST |
| 키워드 | PLED; Fluorene; OTFT |
