DOI QR코드

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Numerical Analysis Using Finite Element Method On Phosphorescent Organic Light Emitting Diodes

  • Hwang, Y.W. (Department of Electrical Engineering, Inha University) ;
  • Lee, H.G. (Department of Electrical Engineering, Inha University) ;
  • Won, T.Y. (Department of Electrical Engineering, Inha University)
  • 투고 : 2013.08.23
  • 심사 : 2013.11.28
  • 발행 : 2014.02.28

초록

In this paper, we report our numerical simulation on the electronic-optical properties of the phosphorescent organic light emitting diodes (PHOLEDs) devices. In order to calculate the electrical and optical characteristics such as the transport behavior of carriers, recombination kinetics, and emission property, we undertake the finite element method (FEM). Our model includes Poisson's equation, continuity equation to account for behavior of electrons and holes and the exciton continuity/transfer equation. We demonstrate that the refractive indexes of each material affect the emission property and the barrier height of the interface influences the behavior of charges and the generation of exciton.

키워드

참고문헌

  1. N. Chopra, J. Lee, and F. So, "30.1: Invited paper: Charge balance in blue phosphorescent organic light emitting diodes,"SID Symposium Digest of Technical Papers, no.1, pp.410-412.
  2. C. Tang and S. VanSlyke, "Organic electroluminescent diodes," Appl.Phys.Lett., vol.51, pp.913.
  3. D. OBrien, M. Baldo, M. Thompson, and S. Forrest, "Improved energy transfer in electrophosphorescent devices," Appl.Phys.Lett., vol.74, no.3, pp.442-444.
  4. A. Mikami and T. Koyanagi, "60.4 L: Late‐News paper: High efficiency 200 ‐ lm/W green light emitting organic devices prepared on High‐Index of refraction substrate,"SID Symposium Digest of Technical Papers, no.1, pp.907-910.
  5. A. Chutinan, K. Ishihara, T. Asano, M. Fujita, and S. Noda, "Theoretical analysis on light-extraction efficiency of organic light-emitting diodes using FDTD and mode-expansion methods," Organic electronics, vol.6, no.1, pp.3-9.
  6. Dexter David L., "A Theory of Sensitized Luminescence in Solids." The Journal of Chemical Physics, vol. 21, pp. 836.
  7. Forster Th, "Zwischenmolekulare Energiewanderung Und Fluoreszenz." Annalen Der Physik, vol. 437, no. 1‐2, pp. 55-75.
  8. B. Ruhstaller, T. Beierlein, H. Riel, S. Karg, J. C. Scott, and W. Riess, "Simulating electronic and optical processes in multilayer organic light-emitting devices," Selected Topics in Quantum Electronics, IEEE Journal of, vol.9, no.3, pp.723-731.
  9. S. Lee, T. Yasuda, M. Yang, K. Fujita, and T. Tsutsui, "Charge carrier mobility in vacuum-sublimed dye films for light-emitting diodes studied by the timeof- flight technique," Mol.Cryst.Liq.Cryst., vol.405, no.1, pp.67-73.
  10. Kawabe Y., J. Abe, "Electron Mobility Measurement using Exciplex-Type Organic Light-Emitting Diodes." Applied Physics Letters, vol. 81, no. 3, pp. 493-495.
  11. Nguyen Ngoc Duy, Marcel Schmeits, Hans-Peter Loebl, "Determination of Charge-Carrier Transport in Organic Devices by Admittance Spectroscopy: Application to Hole Mobility in $\alpha$-NPD." Physical Review B, vol. 75, no. 7, pp. 075307.
  12. M. Kashiwabara, K. Hanawa, R. Asaki, I. Kobori, R. Matsuura, H. Yamada, T. Yamamoto, A. Ozawa, Y. Sato, and S. Terada, "29.5 L: Late‐News paper: Advanced AM‐OLED display based on white emitter with microcavity structure,"SID Symposium Digest of Technical Papers, no.1, pp.1017-1019.