| 학회 | 한국고분자학회 |
| 학술대회 | 2004년 가을 (10/08 ~ 10/09, 경북대학교) |
| 권호 | 29권 2호, p.50 |
| 발표분야 | 분자전자 부문위원회 |
| 제목 | An Efficient and Stable Side-Chain Electro-Optic Polymer System: Polyamic Alkyl Ester |
| 초록 | In the past two decades, numerous electro-optic (EO) polymers have been developed for practical applications in high-speed polymeric EO devices. First of all, large EO coefficients (r33) and their stability are indispensable for the realization of such high-speed devices. It is well known that a high EO effect can be effectively obtained from an optimized chromophore having an extended conjugated system, a low energy transition with a high extinction coefficient, and a large dipole moment between the excited and ground state electronic configurations1. Controlling the chromophore shape has remained a key factor in obtaining high r332. However, a highly efficient EO response has recently been obtained from modifying EO polymer systems such as dendrimeric and hyperbranched systems3. Even though, in general, many researchers have preferred a side-chain EO polymer systemin view of its long-term stability, there have been no reports on improvement of EO response from polymer modification in this system. In this talk, we report a new and simple side-chain EO polymer system containing a commercial chromophore and exhibiting a high EO response. Disperse Red 1 (DR1) and a polyamic acid (PAA) synthesized from 2,2-bis (4-aminophenyl) hexafluoropropane (6F) and oxydiphthalic anhydride (ODPA) were used as the chromophore and the main chain polymer, respectively (Fig. 1). The r33 of the poled EO polyamic alkyl ester (PAE) film is around 25 pm/V at a wavelength of 1.55 μm even though DR1 used as a chromophore shows comparatively low hyperpolarizability (Fig. 2). The r33 is finally maintained at ca. 80 % at 100 oC for 250 h. Additionally, we suggest that the phenomenon of self-poling takes place for a chromophore in the EO film. Fig. 1. Synthesis of EO PAE. Fig. 2. r33 vs. applied voltage. 참고문헌 1. S. R. Marder, B. Kippelen, A. K.-Y. Jen, and N. Peyghambarian, Nature, 388, 845 (1997). 2. Y. Shi, C. Zhang, H. Zhang, J. H. Bechtel, L. R. Dalton, B. H. Robinson, and W. H. Steir, Science, 288, 119 (2000) 3. a) H. Ma, B. Chen, T. Sassa, L. R. Dalton, and A. K.-Y. Jen, J. Am. Chem. Soc., 123, 986 (2001). b) J. Y. Do, S. K. Park, J. J. Ju, S. Park, and M.-H. Lee, Macromol. Chem. Phys., 204, 410 (2003). |
| 저자 | 박승구, 도정윤, 주정진, 박선택, 김민수, 이명현 |
| 소속 | 한국전자통신(연) |
| 키워드 | electro-optic; polyamic acid; polyamic alkyl ester; self-poling |
