New insert layer structure OLEDs |
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| Authors: | Zhi-xiang Gao Yu-ying Hao Jun-feng Lei Cheng Ma and Bing-she Xu |
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| Affiliation: | [1]Department of Physics, Taiyuan University of Technology, Taiyuan 030024, China [2]College of Physics and Electronic Science, Shanxi Datong Univershity, Datong 037009, China [3]College of Materials Science and Engineering, Tiliyuan University of Technology, Taiyuan 030024, China |
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| Abstract: | An insert layer structure organic electroluminescent device(OLED) based on a new luminescent material (Zn(salen)) is fabricated.The configuration of the device is ITO/CuPc/NPD/Zn(salen)/Liq/LiF/Al/CuPc/NPD/Zn(salen)/Liq/LiF/Al.Effective insert electrode layers comprising LiF(1nm)/Al(5 nm) are used as a single semitransparent mirror,and bilayer cathode LiF(1 nm)/Al(100 nm) is used as a reflecting mirror.The two mirrors form a Fabry-Perot microcavity and two emissive units.The maximum brightness and luminous efficiency reach 674 cd/m2 and 2.652 cd/A,respectively,which are 2.1 and 3.7 times higher than the conventional device,respectively.The superior brightness and luminous efficiency over conventional single-unit devices are attributed to microeavity effect. |
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| Keywords: | OLEDs layer structure superior devices effect times conventional maximum brightness luminous efficiency reach mirrors form microcavity units bilayer cathode used single Effective |
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