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7 March 2022 Numerical investigation of fluorescent/phosphorescent multilayer top-emitting organic light-emitting diodes
Yung-Cheng Chang, Jih-Yuan Chang, Man-Fang Huang, Yen-Kuang Kuo
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Proceedings Volume 11998, Organic Photonic Materials and Devices XXIV; 119980E (2022) https://doi.org/10.1117/12.2608703
Event: SPIE OPTO, 2022, San Francisco, California, United States
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Abstract
Structural design and characterization of fluorescent/phosphorescent multilayer top-emitting organic light-emitting diode (OLED) are investigated numerically with the Advanced Physical Model of Semiconductor Devices (APSYS) simulation program in this work. Specifically, the carrier balance and control of the migration of the triplet exciton diffusion avoiding the serious quenching which contributes to the roll-off in quantum efficiency at high current density, and limiting the singlet and triplet excitons at a better emitting zone can be optimized with appropriate cavity design of top-emitting OLED structure. Comparison between the results obtained numerically in this investigation and those obtained experimentally is made. Optimization of the optical and electronic performance of the multilayer OLED devices is attempted. The simulation results show that a better choice for the trade-off between color stability and electroluminescence efficiency can be achieved by properly adjusting the microcavity effect. An optimized performance is achieved if the recombination zone is designed to be located at the maximum of relative power, i.e., the anti-nodal region of the standing wave.
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Yung-Cheng Chang, Jih-Yuan Chang, Man-Fang Huang, and Yen-Kuang Kuo "Numerical investigation of fluorescent/phosphorescent multilayer top-emitting organic light-emitting diodes", Proc. SPIE 11998, Organic Photonic Materials and Devices XXIV, 119980E (7 March 2022); https://doi.org/10.1117/12.2608703
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KEYWORDS
Organic light emitting diodes
Excitons
Electroluminescence
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