열처리된 Znq2에 기초한 유기 EL 소자의 발광특성

조성렬; 정은실; 박수길; 정평진; S. Y. Cho; E. S. Jung; S. G. Park; P. J. Chung

Korean Journal of Materials Research, Vol.9, No.6, 564-568, June, 1999

Export Citation

열처리된 Znq2에 기초한 유기 EL 소자의 발광특성

Luminance Characteristics of Organic Electroluminescent Devices Based on Znq2 by Heating

조성렬, 정은실¹, 박수길^†, 정평진¹

충북대학교 공과대학 공업화학과
¹단국대학교 재료공학과

S. Y. Cho, E. S. Jung¹, S. G. Park^†, and P. J. Chung¹

Dept. of Ind. Chem. Eng., The Univ. of Chungbuk National., Cheongju 361-763, Korea
¹Dept. of Material Eng., The Univ. of Dankook, Chonan 330-714, Korea

E-mail:

초록

출발물질로서 zinc chloride 빛 zinc acetate로부터 Znq2가 성공적으로 합성되었다. 정공운송총으로 N-N’ -diphenyl-N-N' -bis(3-methylphenyl)-1,1' -biphenyl-4,4’ -diamine (TPD) 와 발광충 및 전자운송층으로 bis (8-oxyquinolino) zinc (1]) (Znq2) 을 이용하여 ITO/TPD/Znq2/ Al의 순서로 유기 EL 소자를 제작하였다. 열처리 온도에 따라 각각의 조건에서 준비된 Znq2 의 효율을 검토하였고, PL스펙트럼은 Znq2가 황녹색의 발광을 나타내는 570nm 에서 주 피크를 가지며 이것은 EL스펙트럼과 일치하여 이 발광이 Znq2로부터의 발광임을 알 수 있었다. V-J 곡선은 전하주입이 4V부터 발생함을 알 수 있었으며, 최대 발광휘도 및 효율은 각각 1600cd/m2, O.9lm/W였다. 이상의 실험결과로부터 Znq2가 유용한 EL발광물질로서 가능성이 있음을 나타낸다.

The 8-hydroxyquinoline Zinc(Znq2) were prepared successfully from zinc chloride and zinc acetate as two kinds of starting material. The organic electroluminescent devices(ELDs) were fabricated by the structure of ITO/TPD/Znq2/Al with N-N'-diphenyl-N-N'-bis(3-methylphenyl)-1,1'-biphenyl-4,4'-diamine(TPD) which acts hole trasporting layer and bis(8-oxyquinolino) zinc(II)(Znq2) which acts as emission and electron transporting layer. EL efficiency of Znq2 prepared by heating was investigated. The 570nm of main emission peak which is yellowich green was investigated by photo luminesence(PL) and this results shows that electro luminescence(EL) is from Znq2. The V-J curve shows that carrier injection were investigated from 4V. Maximum luminance and luminance efficiency were 1600cd/ $\m^2$ , 0.9lm/W. From this results, the Znq2 can be one of the useful organic EL material.

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