Organic alternating current electroluminescence device based on 4,4′-bis(N-phenyl-1-naphthylamino) biphenyl/1,4,5,8,9,11-hexaazatriphenylene charge generation unit |
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| Affiliation: | 1. School of Information Science and Technology, Northwest University, Xi’an, Shannxi 710069, People’s Republic of China;2. Shaanxi Key Laboratory of Photonics Technology for Information, School of Electronic and Information Engineering, Xi’an Jiaotong University, Xi’an, Shannxi 710049, People’s Republic of China;3. School of Materials Science and Engineering, Nanyang Technological University, 639798 Singapore, Singapore;1. College of Physics and Optoelectronics, Taiyuan University of Technology, Taiyuan 030024, China;2. School of Physics, State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China;1. Department of Green Energy & Semiconductor Engineering, Hoseo University, Asan, Republic of Korea;2. Department of Engineering Physics, McMaster University, Hamilton, Ontario L8S 4L7, Canada;1. National Engineering Lab for TFT-LCD Materials and Technologies, Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai 200240, People’s Republic of China;2. State Key Laboratory of Coordination Chemistry, Nanjing National Laboratory of Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, People’s Republic of China;3. Department of Green Energy & Semiconductor Engineering, Hoseo University, Asan, South Korea;1. Hunan Key Laboratory for Super-Microstructure and Ultrafast Process, College of Physics and Electronics, Central South University, Changsha 410083, PR China;2. Department of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA |
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| Abstract: | An organic alternating current electroluminescence (OACEL) device based on 4,4′-bis(N-phenyl-1-naphthylamino) biphenyl (NPB)/1,4,5,8,9,11-hexaazatriphenylene (HAT-CN)/tris(8-hydroxy-quin-olinato) aluminum (Alq3) doped with cesium carbonate (Cs2CO3) internal charge generation unit is demonstrated. Maximum luminance of 299 cd/m2 is observed for Alq3 doped with 10-(2-Benzothiazolyl)-2,3,6,7-tetrahydro-1,1,7,7-tetramethyl-1H,5H, 11H-(1) benzopyropyrano (6,7-8-I,j)quinolizin-11-one (C545T) fluorescent emission layer when driven with a peak–peak voltage of 80 V at 120 kHz. The key charge-generation role of NPB/HAT-CN interface is studied experimentally. Furthermore, influence of evaporation sequence of this internal charge generation unit on OACEL performance is investigated. This work demonstrated that the undoped charge generation unit – NPB/HATCN, can also be a good candidate for charge generation unit of OACEL device. |
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| Keywords: | Organic electroluminescence device Alternating current driven Light-emitting performance |
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