Optimization of microcavity OLED by varying the thickness of multi-layered mirror

详细信息    查看全文

• 作者：Albert W. Lu (1)
  J. Chan (1)
  A. D. Raki膰 (1)
  Alan Man Ching Ng (2)
  A. B. Djuri拧i膰 (2)
  
• 关键词：microcavity OLEDs ; optimization
• 刊名：Optical and Quantum Electronics
• 出版年：2006
• 出版时间：September 2006
• 年：2006
• 卷：38
• 期：12-14
• 页码：1091-1099
• 全文大小：402KB
• 参考文献：1. Blades C.D.J. and A.B. Walker. / Proceedings of Synthetic Metal 2nd International Conference on Electroluminescence of Molecular Materials and Related Phenomena May 15-May 18 1999, Vol 111, p. 335, (2000).
  2. Brutting, W., Berleb S., Muckl A.G. (2001). Organic Electron.: phys. mater. Appl. 2, 1
  3. Benisty H., Neve H., Weisbuch C. (1998). IEEE J. Quantum Electron. 34: 1612 CrossRef
  4. Hung L.S., C.H. Chen. 39 80, (2002).
  5. Katsidis C.C., Siapkas D.I. (2002). Appl. Opt. 41: 3978
  6. Lee C.-C., Chang M.-Y., Jong Y.-D., Huang T.-W., Chu C.-S., Chang Y. (2004). Jpn J. Appl. Phys. Part 1: Reg. Pap. Short Notes Rev. Pap. 43: 7560
  7. Mitsas C.L., Siapkas D.I. (1995). Appl. Opt. 34: 1678 CrossRef
  8. Martin S.J., Verschoor G.L.B., Webster M.A., Walker A.B., (2002). Organic Electron. 3, 129 CrossRef
  9. Neyts K.A. (1998). J. Optical Soc. Am. A: Optics Image Sci. Vis. 15, 962
  10. Neyts K., Visschere P.De, Fork D.K., Anderson G.B. (2000). J. Optical Soc. Am. B (Optical Phys.) 17, 114
  11. Peng Y.Q., Yang J.H., Lu F.P. (2006). Appl. Phys. A, 83, 305 CrossRef
  12. Riel H., Karg S., Beierlein T., Riel尾 W. (2003). J. Appl. Phys. 94: 5290 CrossRef
  13. Ruhstaller B., Beierlein T., Riel H., Karg S., Scott J.C., Riess W. (2003). IEEE J. Select. Top. Quant. Electron. 9, 723 CrossRef
  14. Silvaco, / ATLAS User Manual, Santa Clara: Silvaco International, 1, (2000).
  15. Tang C.W., VanSlyke S.A. (1987). Appl. Phys. Lett. 51, 913 CrossRef
  16. Webster M.A., Auld J., Martin S.J., Walker A.B. (2004). Proc. SPIE 5214: 300 CrossRef
  
• 作者单位：Albert W. Lu (1)
  J. Chan (1)
  A. D. Raki膰 (1)
  Alan Man Ching Ng (2)
  A. B. Djuri拧i膰 (2)
  
  1. School of Information Technology and Electrical Engineering, The University of Queensland, Brisbane, Qld, 4072, Australia
  2. Department of Physics, The University of Hong Kong, Pokfulam Road, Hong Kong, Hong Kong
  
• ISSN：1572-817X

文摘

We optimized the emission efficiency from a microcavity OLEDs consisting of widely used organic materials, N,N鈥?di(naphthalene-1-yl)-N,N鈥?diphenylbenzidine (NPB) as a hole transport layer and tris (8-hydroxyquinoline) (Alq3) as emitting and electron transporting layer. LiF/Al was used as a cathode, while metallic Ag was used as an anode material. A LiF/NPB bi-layer or NPB layer on top of the cathode was considered to alter the optical properties of the top mirror. The electroluminescence emission spectra, electric field distribution inside the device, carrier density, recombination rate and exciton density were calculated as a function of the position of the emission layer. The results show that for optimal capping layers thicknesses, light output is enhanced as a result of the increase in both the reflectance and transmittance of the top mirror. Once the optimum structure has been determined, the microcavity OLED devices were fabricated and characterized. The experimental results have been compared to the simulations and the influence of the thickness of the mirror layers, emission region width and position on the performance of microcavity OLEDs was discussed.