| Summary: | 碩士 === 國立中興大學 === 光電工程研究所 === 106 === This study proposes a dual-band white light emitting diode (OLED) using a solution process and using a small molecule organic material as the main body. This luminescent layer utilizes red dyed Tris (1-phenylisoquinoline) iridium. (III) [Ir(piq)3], green dye Tris[2-phenylpyridinato-C2,N]iridium(III) [Ir(ppy)3] and finally the day blue dye Bis[2-(4,6-difluorophenyl) ) pyridinato-C2,N](picolinato)iridium(III) [Firpic], and doped with small molecule host 4,4''-Bis(N-carbazolyl)-1,1''-biphenyl [CBP] with chlorobenzene as solvent ], the above dye is doped into the solvent according to the blending parameters, and subjected to spin coating.
Finally, it is heated and dried to form a desired light-emitting layer film, and a hole blocking layer 2, 9-Dimethyl-4, 7-diphenyl-1, 10-phenanthroline [BCP] and electrons for facilitating the transfer of the mat are deposited on the light-emitting layer. Transport layer Tris-(8-hydroxyquinoline)aluminum [Alq3]. The final structural appearance of this component is ITO/PEDOT: PSS/EML/BCP/Alq3/LiF/Al. Finally, the CIE value of the white light element is adjusted by changing the doping concentration of the dye in the light-emitting layer, and the influence of the dye concentration on the light-emitting brightness and the efficiency characteristic and the influence of the structural modulation on the element efficiency and the electrical property are discussed.
Finally, the 12-% Firpic, 0.25 wt% Ir(piq)3 doping concentration is the closest to the cool white light component, its CIE value is (0.306, 0.3078), and its maximum luminous efficiency is 1.6 lm/W. However, the doping concentration of 12 wt% Firpic and 0.5 wt% Ir(piq)3 is the closest to the warm white light, and its CIE value is (0.394, 0.388), and its maximum luminous efficiency is 1.88 lm/W.
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