The Effect of Excitons Recombination Zone in Organic Light-Emitting Devices with Single No-doped Structure

Li-shuang WU, Hui-shan YANG, Xiao-qin CAI

Abstract


Ultrathin non-doped DBQA emissive layer (EML) has been employed in organic light-emitting diodes. We have investigated the recombination zone in the organic light-emitting devices with single non-doped structure. Yellow material was inserted before or after the electron transport layers for fabricating the devices. The electroluminescence spectrum was dependent upon the position of DBQA in the device. The resulting device exhibits a maximum current efficiency 9.05 cd/A of and a maximum power efficiency of 3.27 lm/W were achieved by optimizing the recombination zone.

Keywords


Organic light-emitting device, Luminance efficiency, Non-doped emissive layer, Ultrathin emissive layer


DOI
10.12783/dtcse/cmee2016/5331

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