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http://dx.doi.org/10.5370/KIEE.2010.59.12.2240

Fabrication of White OLED Using Zn(HPB)2 and Zn(HPQ)2 as a emitting layer  

Kim, Dong-Eun (동아대학교 전기공학과)
Kim, Byoung-Sang (동아대학교 전기공학과)
Kim, Gyong-Chol (동아대학교 나노공학과)
Shin, Hoon-Kyu (포항공대 나노기술집적센터)
Kwon, Young-Soo (동아대학교 전기공학과)
Publication Information
The Transactions of The Korean Institute of Electrical Engineers / v.59, no.12, 2010 , pp. 2240-2244 More about this Journal
Abstract
We have studied white OLED using two types of Zn-complexes as a emitting layer. We synthesized new emissive materials $Zn(HPQ)_2$ as a yellow emitting material and $Zn(HPB)_2$ as a blue emitting material. Zn-complexes have a low molecular compound and thermal stability. The fundamental structures of the fabricated OLED was ITO / NPB (40nm) / $Zn(HPB)_2$ (30nm) / $Zn(HPQ)_2$ / LiF / Al. We varied the thickness of the $Zn(HPQ)_2$ layer 20, 30 40 nm. When the thickness of the $Zn(HPQ)_2$ layer was 20 nm, white emission was achieved. The maximum luminance was 12,000 cd/$m^2$ at a current density of 800 mA/$cm^2$. The CIE coordinates of the white emission was (0.319. 0.338) at an applied voltage of 10 V.
Keywords
White OLED; Zn-complexes;
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