Zhang Zhilin, Jiang Xueyin, Xu Shaohong, Satio S, Nagamoto T, Omoto O. A BLUE EMITTING POLYMER DIODE UTILIZING BBOT AS AN ELECTRON TRANSPORTING LAYER[J]. Chinese Journal of Luminescence, 1994,15(4): 363-365
Zhang Zhilin, Jiang Xueyin, Xu Shaohong, Satio S, Nagamoto T, Omoto O. A BLUE EMITTING POLYMER DIODE UTILIZING BBOT AS AN ELECTRON TRANSPORTING LAYER[J]. Chinese Journal of Luminescence, 1994,15(4): 363-365DOI:
Blue emitting electroluminescent diode using polyvenylcarbazole(PVCz)as a hole transporting layer and BBOT as an electron transporting layer has been constructed.A luminance of as high as 680cd/m
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with quantum efficiency more than 0.15% has been obtained.In order improve the crystalization of the BBOT a novel structure has been used.Instead of the pure BBOT of former diode
in the improved diode(type Ⅱ)BBOT and PVCz were co-evaporated with gradual increase of BBOT concentration on the PVCz layer.The brightness could reach 1700cd/m
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but no increase of efficeincy has been observed.A graded junction is supposed to be formed which increases the injected current and the light intensity.