JOURNAL ARTICLE

Fabrication of White Organic Light Emitting Diode Using Two Types of Zn-Complexes as an Emitting Layer

Dong-Eun Kim, Young-Soo Kwon, Hoon-Kyu Shin
Journal of Nanoscience and Nanotechnology 2015, 15 (1): 488-91
26328388
We have studied white OLED using two types of Zn-complexes as an emitting layer. We synthesized brand new two emissive materials, Zn(HPQ)2 as a yellow emitting material and Zn(HPB)2 as a blue emitting material. The Zn-complexes are low-molecular compounds and stable thermally. The fundamental structures of the fabricated OLED was ITO/NPB (40 nm)/Zn(HPB)2 (30 nm)/Zn(HPQ)2/LiF/Al. We varied the thickness of the Zn(HPQ)2 layer by 20, 30, and 40 nm. When the thickness of the Zn(HPQ)2 layer was 20 nm, the white emission was achieved. The maximum luminance was 12,000 cd/m2 at a current density of 800 mA/cm2. The CIE coordinates of the white emission were (0.319, 0.338) at an applied voltage of 10 V.

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