Model and simulation on the efficiencies of microcavity OLEDs |
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| Authors: | Fengying Ma Jianpo Su Maotian Guo Qiaoxia Gong Zhiyong Duan Jing Yang Yanli Du Bin Yuan Xingyuan Liu |
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| Institution: | 1. School of Physical Science and Engineering, Zhengzhou University, 450001 Zhengzhou, Henan province, China;2. Laboratory of Excited State Processes, Chinese Academy of Sciences, 130033 Changchun, Jilin province, China;3. Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, 130033 Changchun, Jilin province, China;1. Department of Electrical Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran;2. Faculty of Electrical and Computer Engineering, Tarbiat Modares University (TMU), Tehran, Iran;1. University of Jeddah, College of Science, Department of Physics, Jeddah 21589-80200, Saudi Arabia;2. Low Dimensional Materials Research Centre (LDMRC), Department of Physics, Faculty of Science, Universiti Malaya, 50603 Kuala Lumpur, Malaysia;3. Physics Department, Jazan University, Jazan, Saudi Arabia;1. Department of Information Display, Kyung Hee University, Dongdaemoon-gu, Seoul 130-701, Republic of Korea;2. Department of Physics, Kyung Hee University, Dongdaemun-gu, Seoul 130-701, Republic of Korea;1. Reality Devices Research Division, Electronics and Telecommunications Research Institute, 218 Gajeong-ro, Yuseong-gu, Daejeon 34129, Republic of Korea;2. Department of Electronics Engineering, Sookmyung Women’s University, Seoul 04310, Republic of Korea;3. Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea;1. College of Physics, Optoelectronics and Energy & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, 215006, China;2. Key Lab of Advanced Optical Manufacturing Technologies of Jiangsu Province & Key Lab of Modern Optical Technologies of Education Ministry of China, Soochow University, Suzhou, 215006, China;3. SVG Optronics, Co., Ltd, Suzhou 215026, China |
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| Abstract: | This paper presents simple calculation models of the external quantum efficiency and power efficiency for the microcavity OLEDs. The models take into account the energy spatial distribution of the device and provide a rough estimate of the efficiencies for the planar surface emitting devices, by which the integrating sphere and monochrometer were saved. The external quantum efficiency and luminous current efficiency from the structures of glass/DBR/ITO/NPB/Alq: C545T/Alq/LiF/Al and glass/ITO/NPB/Alq: C545T/Alq/LiF/Al were calculated based on these models and the measured data. Comparing with conventional OLED, the external quantum efficiency and luminous current efficiency of the MOLED were improved 3.1% and 8% at low current density (< 10 mA/cm2, corresponding to the display brightness range), respectively. |
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