External coupling and cathode effects in organic light-emitting devices: Modeling and experiments

Proceedings of SPIE - The International Society for Optical Engineering

Volumn 4464, Issue , 2002, Pages 187-196

  Lu, M H ^a   Sturm, J C ^a,b  

^a UNIVERSAL DISPLAY CORPORATION   (United States)

^b B 312 E Quad   (United States)

Author keywords

Organic light emitting devices; Out coupling

Indexed keywords

ANODES; CATHODES; ENERGY TRANSFER; EXCITONS; GREEN'S FUNCTION; LIGHT EMISSION; NUMERICAL METHODS; OPTICAL WAVEGUIDES; QUANTUM OPTICS; SEMICONDUCTING INDIUM COMPOUNDS;

EXTERNAL COUPLINGS;

LIGHT EMITTING DIODES;

EID: 0036394719     PISSN: 0277786X     EISSN: None     Source Type: Journal    
DOI: 10.1117/12.457475     Document Type: Article

References (42)

1. B.E.A. Saleh and M.C. Teich, Fundamentals of Photonics, Wiley, New York, 1991.
2. N.C. Greenham, R.H. Friend, and D.D.C. Bradley, "Angular dependence of the emission form a conjugated polymer light-emitting diode: Implications for efficiency calculateions", Adv. Mater. 6, pp. 491-493, 1994.
3. T. Tsutsui, "Progress in electroluminescent devices using molecular thin films", Mater. Res. Bull. 22, pp.39-45, 1997.
4. J. Kido and Y. Iizumi, "Fabrication of highly efficient organic elecroluminescent devices", Appl. Phys. Lett. 73, pp. 2721-2723, 1998.
5. T. Tsutsui, M.-J. Yang, M. Yahiro, K. Nakamura, T. Wantanabe, T. Tsuji, Y., fukuda, T. Wakimoto, and S. Miyaguchi, "High quantum efficiency in orgnaic light-emitting devices with iridium-comples as a triplet emissive center", Jpn. J. Appl. Phys. 38, pp. L1502-L1504, 1999.
6. M.-H. Lu, C.F. Madigan, and J.C. Storm, "Experiment and modeling of conversion of substrate-waveguided light to surface-emitted light", Mat. Res. Soc. Symp. Proc. 621, pp. Q3.7.1-Q3.7.6, 2000.
7. S. Saito, T. Tsutsui, M. Erra, N. Takada, C. Adachi, Y. Hamada, and T. Wakimoto, "Progress in organic multilayer electroluminescent devices", Proc. SPIE 1910, pp. 212-221, 1993.
8. V. Cirmova and D. Neher, "Microcavity effects in single-layer light-emitting devices based on poly(p-phenylene vinylene", J. Appl. Phys. 79, pp. 3299-3306, 1996.
9. D.G. Lidzey, M.A. Pate, D.M. Whittaker, D.D.C. Bradley, M.S. Weaver, A.A. Fisher, and M.S. Skolnick, "Control of photoluminescence emission from a conjugated polymer using an optimised microcaity structure", Chem. Phys. Lett. 263, pp. 655-660, 1996.
10. J. Gruner, F. Cacialli, and R.H. Friend, "Emission enhancement in single-layer conjugated polymer microcavities", J. Appl. Phys. 80, pp. 207-215, 1996.
11. H.F. Wittman, J. Gruner, R.H. Friend, G.W.C. Spencer, S.C. Moratti, and A.B. Holmes, "Microcavity effect in a single-layer polymer light-emitting diode", Adv. Mater. 7, pp. 541-544, 1995.
12. H. Becker, S.E. Burns, and R.H. Friend, "Effect of metal films on the photoluminescence and electroluminescence of conjugated polymers", Phys. Rev. B, 56, pp. 1893-1905, 1997.
13. J.-S. Kim, P.K.H. Ho, N.C. Greenham, and R.H. Friend, "Electroluninescence emission pattern of organic light-emitting diodes: Implications for devie efficiency calculations", J. Appl. Phys. 88, pp. 1073-1081, 2000.
14. R.R. Chance, A. Prock, and R. Sibley, "Molecular Fluorescence and energy transfer near interfaces", Adv. Chem. Phys., 37, pp. 1-65, 1978.
15. R.R. Chance, A. Prock, and R. Silby, "Comments on the classical theory of energy transfer", J. Chem. Phys. 62, pp. 2245-2253, 1975.
16. +3/mirror systems", J. Chem. Phys. 63, pp. 1589-1595, 1975.
17. K.B. Kahen, "Optical modeling of organic light-emitting diode multilayer device structures", Mat. Res. Soc. Symp. 660, pp. JJ4.2.1-JJ4.2.6, 2001.
18. A.L. Burin and M.A. Ratner, "Exciton migration and cathode quenching in organic light emitting diodes", J. Phys. Chem. A 104, pp. 4704-4710, 2000.
19. K. Ujihara, "Quantum theory of a one-dimensional optical cavity with output coupling. Field quantization", Phys. Rev. A 12, pp. 148-158, 1975.
20. D.G. Deppe and C. Lei, "Spontaneous emission from a dipole in a semiconductor microcavity", J. Appl. Phys. 70, pp. 3443-3448, 1991.
21. G. Bjork, S. Machida, Y. Yamamoto, and K. Igeta, "Modification of spontaneous emission rate in planar dielectric microcavity structures", Phys. Rev. A 44, pp. 669-681, 1991.
22. V. Bulovic, V.B. Khalfin, G. Gu, P.E. Burrows, D.Z. Garbuzov, and S.R. Forrest, "Weak microcavity effects in organic light-emitting devices", Phys. Rev. B. 58, pp. 3730-3740, 1998.
23. C.F. Madigan, M.-H. Lu, and J.C. Sturm, "Improvement of output coupling efficiency of organic light emitting diodes by backside substrate modification", Appl. Phys. Lett. 76, pp. 1650-1652, 2000.
24. M.-H. Lu, C.F. Madigan, and J.C. Sturm, "Improved external coupling efficiency in organic light-emitting devices on high-index substrate", IEDM Tech. Dig., pp. 600-603, 2000.
25. T. Yamasaki, K. Sumioka, and T. Tsutsui, "Organic light-emitting device with an ordered monolayer of silica microspheres as a scattering medium", App. Phys. Lett. 76, pp. 1243-1245, 2000.
26. M. Pope and C.E. Swenberg, Electronic Processes in Organic Crystals, Oxford University Press, Oxford, 1982.
27. 3) thin films", Chem. Phys. Lett. 249, pp. 433-437, 1996.
28. Y. Cao, I.D. Parker, G. Yu, C. Zhang, and A.J. Heeger, "Improved quantum efficiency for electroluminescence in semiconducting polymers", Nature 397, pp. 414-417, 1999.
29. G. Gu, D.Z. Garbuzov, P.E. Burrows, S. Venkatesh, and S.R. Forrest, "High-external-quantum-efficiency organic light-emitting devices", Opt. Lett. 22, pp. 396-398, 1997.
30. A.A. shoustikov, Y. You, and M.E. Thompson, "Electroluminescence color tuning by dye doping in organic light-emitting diodes", IEEE J. Sel. Top. Quan. Elec. 4, pp. 3-13, 1998.
31. rd ed. (Addison-Wesley, Reading Mass. 1998).
32. C.W. Tang, S.A. van Slyke, and C.H. Chen, "Electroluminescence of doped organic thin films", J. Appl. Phys. 65, pp. 3610-3616, 1989.
33. C.T. Tai, Dyadic Green's Function in Electromagnetic Theory, Intext, New York, 1971.
34. A. Summerfeld, Electrodynamics, Academic Press, New York, 1952.
35. J.J. Macklin, J.K. Trautman, T.D. Harris, and L.E. Brus "Imaging and time-resolved spectroscopy of single molecules at an interface", Science 272, pp. 255-258, 1996.
36. Y. Shi, J. Liu, and Y. Yang, "Device performance and polymer morphology in polymer light emitting diodes: The control of thin film morphology and device quantum efficiency", J. Appl. Phys. 87, pp. 4254-4263, 2000.
37. J. Liu, Y. Shi, L. Ma, and Y. Yang, "Device performance and polymer morphology in polymer light emitting diodes: The control of device elctrical properties and metal/polymer contact", J. Appl. Phys. 88, pp. 605-610, 2000.
38. C.-C. Wu, C.-I. Wu, J.C. Sturm, and A. Kahn, "Surface modification of indium tin oxide by plasma treatment: An effective method to improve the efficiency, brightness and reliability of organic light emitting devices", Appl. Phys. Lett. 70, pp. 1348-1350, 1997.
39. The results presented in figures 6 and 8 are based on the lifetime calculated for each specific OLED rather than using the total decay rate calculated in Ref. 22. Thus they are more accurate than previously published results in Refs. 6 and 24, although the difference is small.
40. H. Aziz, Z.D. Popovic, N.-X. Hu, A.-M. Hor, and G. Xu, "Degradation mechanism of small molecule-based organic light-emitting devices", Science 283, pp. 1900-1902, 1999.
41. M.-H. Lu and J.C. Sturm, "External coupling efficiency in planar organic light emitting devices", Appl. Phys. Lett., 78, pp. 1927-1929, 2001.
42. M.-H. Lu and J.C. Strum, "Optimization of External Coupling and Light Emission in Organic Light-Emitting Devices: Modeling and Experiment", J. Appl. Phys. 91, pp. 595-604, 2002.