Variations in Electroluminescence Spectra of Organic Light Emitting Diodes Containing Bathocuproine Layer
来源期刊：Journal Of Wuhan University Of Technology Materials Science Edition2009年第2期
论文作者：袁颂东 唐和清
文章页码：264 - 268
摘 要：Electroluminescence （EL） of organic light emitting diodes （OLEDs） with a configuration of ITO/TPD/BC/Alq3/Mg-Ag, where TPD, BC and Alq3 represent N, N’-diphenyl-N, N’-bis （3-methylphenyl）-1,1’-biphenyl-4,4’-diamine, bathocuproine and tris（8-quinolinolato）aluminum（III）, respectively, was investigated in comparison with the photoluminescence （PL） of the individual organic layers. The EL spectra of the OLEDs were found to be much different from the PL spectra of the component multiple layer structure. Each organic layer made its contribution to the light emitted from the OLEDs. Their individual contributions were related to the field distribution across the device, which was in turn dependent on the thickness of each organic layer and the applied bias voltages. Consequently, the EL spectra of the OLEDs were observed to vary as the relative thickness of any organic layer was changed and as the bias voltage was alternated. The variation of the EL spectra of the device resulted in the easiness of achieving variable colors emitted by the device, from blue to green, and then to near white light.
袁颂东1,2，唐和清1
1. Department of Chemistry and Chemical Engineering, Huazhong University of Science and Technology2. School of Chemical and Environmental Engineering , Hubei University of Technology
摘 要：Electroluminescence （EL） of organic light emitting diodes （OLEDs） with a configuration of ITO/TPD/BC/Alq3/Mg-Ag, where TPD, BC and Alq3 represent N, N’-diphenyl-N, N’-bis （3-methylphenyl）-1,1’-biphenyl-4,4’-diamine, bathocuproine and tris（8-quinolinolato）aluminum（III）, respectively, was investigated in comparison with the photoluminescence （PL） of the individual organic layers. The EL spectra of the OLEDs were found to be much different from the PL spectra of the component multiple layer structure. Each organic layer made its contribution to the light emitted from the OLEDs. Their individual contributions were related to the field distribution across the device, which was in turn dependent on the thickness of each organic layer and the applied bias voltages. Consequently, the EL spectra of the OLEDs were observed to vary as the relative thickness of any organic layer was changed and as the bias voltage was alternated. The variation of the EL spectra of the device resulted in the easiness of achieving variable colors emitted by the device, from blue to green, and then to near white light.
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