High Efficiency Electron Transfer Layer based on Ag-Al Co-Doped ZnS in Organic Lighting Emission Devices

Electron transmission improvement in organic light-emitting devices with Ag-Al co-doped ZnS has been demonstrated. The electroluminescence (EL) of device with co-doped ZnS electron transfer layer (ETL) is more than that of devices without ETL and the co-doped ZnS ETL device performs higher EL compar...

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Bibliographic Details
Published in:ECS solid state letters 2014-12, Vol.4 (2), p.R10-R12
Main Authors: He, Xiaoxiao, Wang, Wenjun, Li, Shuhong, Wang, Qingru, Zheng, Wanquan, Shi, Qiang, Liu, Yunlong
Format: Article
Language:English
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Summary:Electron transmission improvement in organic light-emitting devices with Ag-Al co-doped ZnS has been demonstrated. The electroluminescence (EL) of device with co-doped ZnS electron transfer layer (ETL) is more than that of devices without ETL and the co-doped ZnS ETL device performs higher EL compared to pure ZnS ETL device. The using of co-doped ZnS can reduce the thickness of ETL from 40 nm to 8 nm and performs comparable efficiency and higher EL. According to the PL spectra studies and current density-voltage characters, the improved electron transmission is attributed to the introduction of impurity energy level and the increased concentration of electron.
ISSN:2162-8742
2162-8750
DOI:10.1149/2.0021502ssl