| Summary: | 碩士 === 國立成功大學 === 電機工程學系碩博士班 === 97 === In this research, we fabricate a white organic light-emitting diode employed the mixed host in a single emissive layer. We mixed the different host materials and the doping material into a solvent to make up the thermal evaporation source of the emissive layer. First, we fabricated a series of blue OLEDs by adjusting the doping concentration of NPB, and discussed the characteristic and colors. The next, base on the co-host structure, we fabricated a single emissive layer white OLED. In this experiment, we use the 4,4-bis[N-(1-naphthyi)-N-phenyl-amino]-biphenyl (NPB) as the hole transport layer, the (4,4’Bis[2,2-di(4-methylphenyl)-ethen-1-yl]biphenyl) (p-DMDPVBi) and 4,4-bis[N-(1-naphthyi)-N-phenyl-amino]-biphenyl (NPB) as the host materials of the emissive layer, and the (5,6,11,12)-Tetraphenylnaphthacene (Rubrene) as the orange dopant. We use the 2-2’-2”-(1,3,5-benzinetriyl)tris(l-phenl-1-H-benzimidazole) (TPBi) as the electron transport layer and hole blocking layer.
The research attains the blue OLEDs characteristic data, turn on voltage (2.8 V) and the maxima efficiency (5.18 cd/A). At the 100 cd/m2 and 900 cd/m2, the CIE coordinate varies from (0.164, 0.161) to (0.164, 0.160). Also, in the white emission and attains the turn on voltage (2.8 V), the maxima luminance (20300 cd/m2). At the 1000 cd/m2 and 10000 cd/m2, the device efficiency are 10.511 cd/A and 7.701 cd/A, and the CIE coordinate are
(0.29, 0.32) and (0.31, 0.34), being the white color.
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