Novel materials of Zn(HPB)2 and Ir-complexes were respectively synthesized as blue or redemitting material. White Organic Light Emitting Diodes (OLED) were fabricated by using Zn(HPB)2 for ablue emitting layer, Ir-complexes for a red emitting layer and Alq3 for a green emitting layer. White OLED was fabricated by using double emitting layers of Zn(HPB)2 and Alq3:Ir-complexes, and hole blocking layer of BCP. We also varied the thickness of BCP. When the thickness of BCP layer was 5nm, white emission was achieved. We obtained a maximum luminance of 3,500 cd/m2. The CIE coordinates was (0.375, 0.331). From this study, we could propose that the hybrid structure is efficient in lighting application of white OLED by improvement of color purity.

We synthesized new materials of Zn(HPB)2 and Ir-complexes as blue or red emitting material. We fabricated white Organic Light Emitting Diodes (OLED) by using Zn(HPB)2 for the blue emitting layer, Ir-complexes for the red emitting layer and Alq3 for the green emitting layer. We fabricated white OLED by using double emitting layers of Zn(HPB)2:Ir-complexes and Alq3. The doping rate of Ir-complexes was varied, such as 0.2%, 0.4%, 0.6%, and 0.8%, respectively. When the doping rate of Zn(HPB)2:Ir-complexes was 0.6%, white emission was achieved. The Commission Internationale de l`Eclairage (CIE) coordinates of the white emission was (0.322, 0.312).