Study of the Yellow Organic Light Emitting Diodes using ZnS/Metal/ZnS Multilayer Anodes and Investigation of the Effect of BCP on Electroluminescent Spectra of the Devices
نویسندگان
چکیده
The effects of ZnS/Metal/ZnS multilayer anodes, including ZnS/Au/ZnS (ZAuZ), ZnS/Ag/ZnS (ZAgZ) and ZnS/Cu/ZnS (ZCuZ) on device performance in organic light emitting diodes based on rubrene were investigated systematically. The device with ZAuZ as anode gave an improved performance comparable with ITO based devices. A low driving voltage of 5.61 V and a high luminance of 1836 cd/m were obtained in the ZAuZ based device. Then the effect of BCP as hole blacking layer on emissive spectra of ZAuZ based OLEDs was investigated and white spectra with (0.32,0.31) colour coordinates was obtained for ZAuZ/PEDOT:PSS/TPD/BCP/Rubrene/BCP/BPhen/LiF/Al multilayer structure.
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