화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of the Korean Industrial and Engineering Chemistry, Vol.12, No.3, 348-351, May, 2001
Export Citation
Poly(3-octylthiophene-co-3-(4-fluorophenyl)thiophene)의 합성과 적색 유기 발광 물질로서의 전기광학적 특성에 관한 연구
Studies on the Synthesis of Poly(3-octhlthiophene-co-3-(4-fluorophenyl)thiophene)and Its Opto-electrical Characteristics as a Red Emitting Material
신선호†, 정애영, 김주현1, 이후성1, 김동표2
  • (주)엘리아테크 FPD연구소, 서울
  • 1서강대학교 화학과, 서울 100-611
  • 2충남대학교 정밀공업화학과, 대전 305-764
Seon Ho Shin†, Ae young Jeong, Joo Hyun Kim1, Hoosung Lee1, and Dong Pyo Kim2
  • FPD R&D Center, Eliatech Co., Ltd., 120-65 Daesan tower, Seongnae-dong, Kangdong-Ku, Seoul, Korea
  • 1Department of Chemistry, Sogang University, Seoul 100-611, Korea
  • 2Department of Fine Chemicals Engineering & Chemistry, Chungnam National Unversity, Taejeon 305-764, Korea
E-mail:
초록
3-Octylthiophene과 3-(4-fluorophenyl)thiophene을 공중합하여 발광 효율과 색순도가 우수한 유기 전기 발광 고분자를 개발하였다. 공중합한 고분자의 전기·광학적 특성을 Photoluminescence(PL), Electroluminescence(EL) 스펙트럼과 유기 전기 발광 소자의 I-V, V-L 곡선을 이용하여 조사하였다. poly(3-octylthiophene-co-3-(4-fluorophenyl)thiophene) (2:1)[P(OT/FPT) (2:1)]의 PL 필름 스펙트럼에서 최대 발광 파장 (651 nm)이 용액의 그것에 비하여 21 nm 만큼 적색 이동하였는데, 그 크기가 poly(3-octylthiophene) (POT)에 비해 12 nm 정도 적게 일어났다. 이는 p(OT/FPT) (2:1)에서 excimer complex의 영향이 적음을 의미한다. Polythiophene의 우수한 정공 전달 능력과 4-fluorophenyl 기의 전자 끌기에 의해 전자 주입이 용이해져 P(OT/FPT) (2:1)의 구동 전압이 6 V로 낮아지고 색순도가 개선되었으며 발광 세기가 증가된 것으로 믿어진다.
In an attempt to improve the Electroluminescence(EL) efficiency of an organic polymer, a copolymer of 3-octylthiophene and 3-(4-flurophenyl)thiophene was synthesized. The electrical and optical characteristics of the copolymer was investigated by measuring the Photolumine-scence(PL) and EL spectra as well as the I-V-L curves. The λ(max) (651 nm) in the PL spectrum of poly(3-octylthiophene-co-3-(4-fluorophenyl)thiophene) (2:1)[P(OT/FPT) (2:1)] film was red-chifted by 21 nm compared with that of the solution in chloroform which is smaller by 12 nm than the red-shift in poly(3-octylthiophene) (POT). This indicates that the excimer formation is less prominent in P(OT/FPT) (2:1) than in POT. It is believed that the color purity was improved due to the high hole transport capability of polythiophene and the electron withdrawing characteristics of 4-fluorophenyl group. This leads to the efficient injection of electrons and eventually to the lower operating voltage, i.e 6 V, and improvement of the intensity of the EL device using P(OT/FPT) (2:1).
Keywords:red;EL;emitting meterial;thiophene
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