Tandem white organic light-emitting device using non-modified Ag layer as cathode and interconnecting layer |
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| Affiliation: | 1. State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, People’s Republic of China;2. College of Chemistry, Northeast Normal University, Changchun, Jilin 130024, People’s Republic of China;1. State Key Laboratory of Luminescent Materials and Devices, and Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology (SCUT), Guangzhou 510640, China;1. State Key Laboratory on Integrated Optoelectronics, College of Electronics Science and Engineering, Jilin University, Changchun, 130012, People''s Republic of China;2. Department of Physics, Quanzhou Normal College, Quanzhou, 362000, People''s Republic of China;1. Department of Physics, Center for Optoelectronics Engineering Research, Yunnan University, Kunming 650091, China;2. Department of Materials Science and Engineering, University of Toronto, Toronto, Ontario M5S 3E4, Canada |
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| Abstract: | Tandem white organic light-emitting device (WOLED) using non-modified Ag film as cathode and interconnecting layer is demonstrated. Effective electron injection is achieved when Ag is deposited on 4,7-diphenyl-1,10-phenanthroline electron transporting layer without any modified layer. Single OLED with Ag cathode shows comparable performance to that of device with Mg:Ag cathode. Such tandem WOLED exhibits low driving voltage, high power efficiency (15.1 lm/W at 1000 cd/m2) and low efficiency roll-off. The working mechanisms of single and tandem devices were discussed in detail. These results could provide a simple method to fabricate high performance tandem white OLED. |
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| Keywords: | OLED Tandem Ag Bphen |
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