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http://dx.doi.org/10.7471/ikeee.2020.24.3.706

Solution Processed Hexaazatrinaphthylene derivatives as a efficient hole injection layer for phosphorescent organic light-emitting diodes  

Lee, Jangwon (Department of Creative Convergence Engineering, Hanbat National University)
Sung, Baeksang (Department of Creative Convergence Engineering, Hanbat National University)
Lee, Seung-Hoon (Department of Creative Convergence Engineering, Hanbat National University)
Yoo, Jae-Min (Department of Creative Convergence Engineering, Hanbat National University)
Lee, Jae-Hyun (Department of Creative Convergence Engineering, Hanbat National University)
Lee, Jonghee (Department of Creative Convergence Engineering, Hanbat National University)
Publication Information
Journal of IKEEE / v.24, no.3, 2020 , pp. 706-712 More about this Journal
Abstract
To improve light-emitting performance of green phosphorescent organic light-emitting diodes (OLEDs), we introduced new hole injection materials-hexaazatrinaphthylene (HATNA) derivatives as a solution processed hole injection layer (HIL). The HATNA derivative has a low the lowest unoccupied molecular orbital (LUMO) energy level, similar to the work function of Indium Tin Oxide (ITO), showing a different concept of hole injection mechanism. It was confirmed that the device efficiency of OLEDs using HATNA-HIL showed the improved external quantum efficiency from 10.8% to 15.6% and current efficiency from 32.7 cd/A to 42.7 cd/A due to the balance of electrons and holes in the emissive layer.
Keywords
Organic light emitting diodes; Hole injection layer; Solution-process; HATNA; efficiency;
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Times Cited By KSCI : 1  (Citation Analysis)
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