Abstract

The majority of photons emitted in organic light-emitting diodes are either trapped in the substrate or emitted into lossy waveguided modes. We show how optimized, non-periodic dielectric stacks inserted between the substrate and transparent anode can be used to improve the photon outcoupling efficiency by tailoring of the local photon density of states. Unlike previously demonstrated outcoupling schemes, this method does not lead to pixel blurring and maintains a Lambertian angular emission profiles within a specified cone. For small molecular weight, green-emitting devices, a 2.5-fold uniformly distributed increase in brightness is achievable for a viewing angle of 60°.

© 2007 Optical Society of America

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  1. P. A. Hobson, S. Wedge, J. A. E. Wasey, I. Sage and W. L. Barnes, "Surface plasmon mediated emission from organic light-emitting diodes," Adv. Mater. 14, 1393-1396 (2002).
    [CrossRef]
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    [CrossRef]
  3. 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, 1650-1652 (2000).
    [CrossRef]
  4. S. Moller and S. R. Forrest, "Improved light out-coupling in organic light emitting diodes employing ordered microlens arrays," J. Appl. Phys. 91, 3324-3327 (2002).
    [CrossRef]
  5. T. Tsutsui, M. Yashiro, H. Yokogawa, K. Kawano, M. Yokoyama, "Doubling coupling-out efficiency in organic light-emitting devices using a thin silica aerogel layer," Adv. Mater.,  13, 1149-1152 (2001)
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2004 (1)

L. H. Smith, J. A. Wasey, W. L. Barnes, "Light outcoupling efficiency of top-emitting organic light-emitting diodes, " Appl. Phys. Lett. 84, 2986-2988 (2004).
[CrossRef]

2003 (1)

M. Gerken and D. A. B. Miller, "Wavelength demultiplexer using the spatial dispersion of multilayer thin-film structures," Photonic Technol Lett. 15, 1097-1099 (2003).

2002 (2)

P. A. Hobson, S. Wedge, J. A. E. Wasey, I. Sage and W. L. Barnes, "Surface plasmon mediated emission from organic light-emitting diodes," Adv. Mater. 14, 1393-1396 (2002).
[CrossRef]

S. Moller and S. R. Forrest, "Improved light out-coupling in organic light emitting diodes employing ordered microlens arrays," J. Appl. Phys. 91, 3324-3327 (2002).
[CrossRef]

2001 (3)

T. Tsutsui, M. Yashiro, H. Yokogawa, K. Kawano, M. Yokoyama, "Doubling coupling-out efficiency in organic light-emitting devices using a thin silica aerogel layer," Adv. Mater.,  13, 1149-1152 (2001)
[CrossRef]

P. T. Worthing and W. L. Barnes, "Efficient coupling of surface plasmon polaritons to radiation using a bi-grating," Appl. Phys. Lett. 79, 3035-3037 (2001).
[CrossRef]

M. Deopura, C. K. Ullal, B. Temelkuran, and Y Fink," Dielectric omnidirectional visible reflector," Opt. Lett. 26, 1197-1199 (2001).

2000 (2)

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, 1650-1652 (2000).
[CrossRef]

J. Vuckovic, M. Loncar and A. Scherer, "Surface plasmon enhanced light-emitting diodes," IEEE J. Quantum Electron. 36, 1131-1144 (2000).
[CrossRef]

1999 (2)

M. A. Baldo, S. Lamansky, P. E. Burrows, M. E. Thompson and S. R. Forrest, "Very high-efficiency green organic light-emitting devices based on electrophosphorescence," Appl. Phys. Lett. 75, 4-6 (1999).
[CrossRef]

Y. Xu, J. S. Vuckovic, R. K. Lee, O. J. Painter, A. Scherer, and A Yariv, "Finite-difference time-domain calculation of spontaneous emission lifetime in a microcavity," J. Opt. Soc. Am. B,  16, 465-474 (1999).

1998 (1)

N. Matuschek, FranzX. Kartner and Ursula Keller, "Theory of double-chirped mirrors," IEEE J. Sel. Top. Quantum Electron. 4, 197-208 (1998).

N. Matuschek, FranzX. Kartner and Ursula Keller, "Theory of double-chirped mirrors," IEEE J. Sel. Top. Quantum Electron. 4, 197-208 (1998).

1997 (2)

S. Fan, P. R. Villeneuve and J. D. Joannopoulos, "High extraction efficiency of spontaneous emission from slabs of photonic crystals," Phys. Rev. Lett. 78, 3294-3297 (1997)
[CrossRef]

K. V. Popov, J. A. Dobrowolski, A. V. Tikhonravov and B. T. Sullivan, "Broadband high-reflection multilayer coatings at oblique angles of incidence," Appl. Opt. 36, 2139-2151 (1997).

1996 (3)

1994 (1)

T. Tsutsui, N. Takada and Shogo Saito, "Sharply directed emission in organic electroluminescent diodes with an optical-microcavity structure," Appl. Phys. Lett. 65, 1868-1870 (1994).
[CrossRef]

1993 (2)

T. Nakayama, Y. Itoh and A. Kakuta, "Organic photo- and electroluminescent devices with double mirrors," Appl. Phys. Lett. 63, 594-595 (1993).
[CrossRef]

A. V. Tikhonravov, "Some theoretical aspects of thin-film optics and their applications," Appl. Opt. 32, 5417-5426 (1993).

1991 (1)

R. J. Glauber and M. L. Lewenstein, ‘‘Quantum optics of dielectric media,’’Phys. Rev. A 43, 467-491 (1991).
[CrossRef]

1984 (1)

G. W. Ford and W. H. Weber, "Electromagnetic interactions of molecules with metal surfaces," Phys. Rep. 113, 195-287 (1984).
[CrossRef]

1978 (1)

R. R. Chance, A. Prock and R. Silbey, "Molecular fluorescence and energy transfer near interfaces," Adv. Chem. Phys. 37, 1-65 (1978).

1969 (1)

P. A. Lee, G. Said, R. Davis and T. H. Lim, "On the optical properties of some layer compounds," J. Phys. Chem. Solids 30, 2719-2729 (1969).

1965 (1)

J. A. Nelder and R. Mead, "A simplex method for function minimization," Comput. J. 7, 308-313 (1965).

Baldo, M. A.

M. A. Baldo, S. Lamansky, P. E. Burrows, M. E. Thompson and S. R. Forrest, "Very high-efficiency green organic light-emitting devices based on electrophosphorescence," Appl. Phys. Lett. 75, 4-6 (1999).
[CrossRef]

Barnes, W. L.

L. H. Smith, J. A. Wasey, W. L. Barnes, "Light outcoupling efficiency of top-emitting organic light-emitting diodes, " Appl. Phys. Lett. 84, 2986-2988 (2004).
[CrossRef]

P. A. Hobson, S. Wedge, J. A. E. Wasey, I. Sage and W. L. Barnes, "Surface plasmon mediated emission from organic light-emitting diodes," Adv. Mater. 14, 1393-1396 (2002).
[CrossRef]

P. T. Worthing and W. L. Barnes, "Efficient coupling of surface plasmon polaritons to radiation using a bi-grating," Appl. Phys. Lett. 79, 3035-3037 (2001).
[CrossRef]

Burrows, P. E.

M. A. Baldo, S. Lamansky, P. E. Burrows, M. E. Thompson and S. R. Forrest, "Very high-efficiency green organic light-emitting devices based on electrophosphorescence," Appl. Phys. Lett. 75, 4-6 (1999).
[CrossRef]

Chance, R. R.

R. R. Chance, A. Prock and R. Silbey, "Molecular fluorescence and energy transfer near interfaces," Adv. Chem. Phys. 37, 1-65 (1978).

Davis, R.

P. A. Lee, G. Said, R. Davis and T. H. Lim, "On the optical properties of some layer compounds," J. Phys. Chem. Solids 30, 2719-2729 (1969).

DeBell, G. W.

Deopura, M.

Dobrowolski, J. A.

Dodabalapur, A.

A. Dodabalapur, L. J. Rothberg, R. H. Jordan, T. M. Miller, R. E. Slusher, and JuliaM. Phillipse, "Physics and applications of organic microcavity light emitting diodes," J. Appl. Phys. 80, 6954-6964 (1996).
[CrossRef]

Fan, S.

S. Fan, P. R. Villeneuve and J. D. Joannopoulos, "High extraction efficiency of spontaneous emission from slabs of photonic crystals," Phys. Rev. Lett. 78, 3294-3297 (1997)
[CrossRef]

Fink, Y

Ford, G. W.

G. W. Ford and W. H. Weber, "Electromagnetic interactions of molecules with metal surfaces," Phys. Rep. 113, 195-287 (1984).
[CrossRef]

Forrest, S. R.

S. Moller and S. R. Forrest, "Improved light out-coupling in organic light emitting diodes employing ordered microlens arrays," J. Appl. Phys. 91, 3324-3327 (2002).
[CrossRef]

M. A. Baldo, S. Lamansky, P. E. Burrows, M. E. Thompson and S. R. Forrest, "Very high-efficiency green organic light-emitting devices based on electrophosphorescence," Appl. Phys. Lett. 75, 4-6 (1999).
[CrossRef]

Franz, N.

N. Matuschek, FranzX. Kartner and Ursula Keller, "Theory of double-chirped mirrors," IEEE J. Sel. Top. Quantum Electron. 4, 197-208 (1998).

Gerken, M.

M. Gerken and D. A. B. Miller, "Wavelength demultiplexer using the spatial dispersion of multilayer thin-film structures," Photonic Technol Lett. 15, 1097-1099 (2003).

Glauber, R. J.

R. J. Glauber and M. L. Lewenstein, ‘‘Quantum optics of dielectric media,’’Phys. Rev. A 43, 467-491 (1991).
[CrossRef]

Hobson, P. A.

P. A. Hobson, S. Wedge, J. A. E. Wasey, I. Sage and W. L. Barnes, "Surface plasmon mediated emission from organic light-emitting diodes," Adv. Mater. 14, 1393-1396 (2002).
[CrossRef]

Itoh, Y.

T. Nakayama, Y. Itoh and A. Kakuta, "Organic photo- and electroluminescent devices with double mirrors," Appl. Phys. Lett. 63, 594-595 (1993).
[CrossRef]

Joannopoulos, J. D.

S. Fan, P. R. Villeneuve and J. D. Joannopoulos, "High extraction efficiency of spontaneous emission from slabs of photonic crystals," Phys. Rev. Lett. 78, 3294-3297 (1997)
[CrossRef]

Jordan, R. H.

A. Dodabalapur, L. J. Rothberg, R. H. Jordan, T. M. Miller, R. E. Slusher, and JuliaM. Phillipse, "Physics and applications of organic microcavity light emitting diodes," J. Appl. Phys. 80, 6954-6964 (1996).
[CrossRef]

Julia, R. E.

A. Dodabalapur, L. J. Rothberg, R. H. Jordan, T. M. Miller, R. E. Slusher, and JuliaM. Phillipse, "Physics and applications of organic microcavity light emitting diodes," J. Appl. Phys. 80, 6954-6964 (1996).
[CrossRef]

Kakuta, A.

T. Nakayama, Y. Itoh and A. Kakuta, "Organic photo- and electroluminescent devices with double mirrors," Appl. Phys. Lett. 63, 594-595 (1993).
[CrossRef]

Kawano, K.

T. Tsutsui, M. Yashiro, H. Yokogawa, K. Kawano, M. Yokoyama, "Doubling coupling-out efficiency in organic light-emitting devices using a thin silica aerogel layer," Adv. Mater.,  13, 1149-1152 (2001)
[CrossRef]

Lamansky, S.

M. A. Baldo, S. Lamansky, P. E. Burrows, M. E. Thompson and S. R. Forrest, "Very high-efficiency green organic light-emitting devices based on electrophosphorescence," Appl. Phys. Lett. 75, 4-6 (1999).
[CrossRef]

Lee, P. A.

P. A. Lee, G. Said, R. Davis and T. H. Lim, "On the optical properties of some layer compounds," J. Phys. Chem. Solids 30, 2719-2729 (1969).

Lee, R. K.

Lewenstein, M. L.

R. J. Glauber and M. L. Lewenstein, ‘‘Quantum optics of dielectric media,’’Phys. Rev. A 43, 467-491 (1991).
[CrossRef]

Lim, T. H.

P. A. Lee, G. Said, R. Davis and T. H. Lim, "On the optical properties of some layer compounds," J. Phys. Chem. Solids 30, 2719-2729 (1969).

Loncar, M.

J. Vuckovic, M. Loncar and A. Scherer, "Surface plasmon enhanced light-emitting diodes," IEEE J. Quantum Electron. 36, 1131-1144 (2000).
[CrossRef]

Lu, M. H.

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, 1650-1652 (2000).
[CrossRef]

Madigan, C. F.

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, 1650-1652 (2000).
[CrossRef]

Matuschek, N.

N. Matuschek, FranzX. Kartner and Ursula Keller, "Theory of double-chirped mirrors," IEEE J. Sel. Top. Quantum Electron. 4, 197-208 (1998).

Mead, R.

J. A. Nelder and R. Mead, "A simplex method for function minimization," Comput. J. 7, 308-313 (1965).

Miller, D. A. B.

M. Gerken and D. A. B. Miller, "Wavelength demultiplexer using the spatial dispersion of multilayer thin-film structures," Photonic Technol Lett. 15, 1097-1099 (2003).

Miller, T. M.

A. Dodabalapur, L. J. Rothberg, R. H. Jordan, T. M. Miller, R. E. Slusher, and JuliaM. Phillipse, "Physics and applications of organic microcavity light emitting diodes," J. Appl. Phys. 80, 6954-6964 (1996).
[CrossRef]

Moller, S.

S. Moller and S. R. Forrest, "Improved light out-coupling in organic light emitting diodes employing ordered microlens arrays," J. Appl. Phys. 91, 3324-3327 (2002).
[CrossRef]

Nakayama, T.

T. Nakayama, Y. Itoh and A. Kakuta, "Organic photo- and electroluminescent devices with double mirrors," Appl. Phys. Lett. 63, 594-595 (1993).
[CrossRef]

Nelder, J. A.

J. A. Nelder and R. Mead, "A simplex method for function minimization," Comput. J. 7, 308-313 (1965).

Painter, O. J.

Popov, K. V.

Prock, A.

R. R. Chance, A. Prock and R. Silbey, "Molecular fluorescence and energy transfer near interfaces," Adv. Chem. Phys. 37, 1-65 (1978).

Rothberg, L. J.

A. Dodabalapur, L. J. Rothberg, R. H. Jordan, T. M. Miller, R. E. Slusher, and JuliaM. Phillipse, "Physics and applications of organic microcavity light emitting diodes," J. Appl. Phys. 80, 6954-6964 (1996).
[CrossRef]

Sage, I.

P. A. Hobson, S. Wedge, J. A. E. Wasey, I. Sage and W. L. Barnes, "Surface plasmon mediated emission from organic light-emitting diodes," Adv. Mater. 14, 1393-1396 (2002).
[CrossRef]

Said, G.

P. A. Lee, G. Said, R. Davis and T. H. Lim, "On the optical properties of some layer compounds," J. Phys. Chem. Solids 30, 2719-2729 (1969).

Saito, Shogo

T. Tsutsui, N. Takada and Shogo Saito, "Sharply directed emission in organic electroluminescent diodes with an optical-microcavity structure," Appl. Phys. Lett. 65, 1868-1870 (1994).
[CrossRef]

Scherer, A.

Silbey, R.

R. R. Chance, A. Prock and R. Silbey, "Molecular fluorescence and energy transfer near interfaces," Adv. Chem. Phys. 37, 1-65 (1978).

Slusher, R. E.

A. Dodabalapur, L. J. Rothberg, R. H. Jordan, T. M. Miller, R. E. Slusher, and JuliaM. Phillipse, "Physics and applications of organic microcavity light emitting diodes," J. Appl. Phys. 80, 6954-6964 (1996).
[CrossRef]

Smith, L. H.

L. H. Smith, J. A. Wasey, W. L. Barnes, "Light outcoupling efficiency of top-emitting organic light-emitting diodes, " Appl. Phys. Lett. 84, 2986-2988 (2004).
[CrossRef]

Sturm, J. C.

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, 1650-1652 (2000).
[CrossRef]

Sullivan, B. T.

Takada, N.

T. Tsutsui, N. Takada and Shogo Saito, "Sharply directed emission in organic electroluminescent diodes with an optical-microcavity structure," Appl. Phys. Lett. 65, 1868-1870 (1994).
[CrossRef]

Temelkuran, B.

Thompson, M. E.

M. A. Baldo, S. Lamansky, P. E. Burrows, M. E. Thompson and S. R. Forrest, "Very high-efficiency green organic light-emitting devices based on electrophosphorescence," Appl. Phys. Lett. 75, 4-6 (1999).
[CrossRef]

Tikhonravov, A. V.

Trubetskov, M. K.

Tsutsui, T.

T. Tsutsui, M. Yashiro, H. Yokogawa, K. Kawano, M. Yokoyama, "Doubling coupling-out efficiency in organic light-emitting devices using a thin silica aerogel layer," Adv. Mater.,  13, 1149-1152 (2001)
[CrossRef]

T. Tsutsui, N. Takada and Shogo Saito, "Sharply directed emission in organic electroluminescent diodes with an optical-microcavity structure," Appl. Phys. Lett. 65, 1868-1870 (1994).
[CrossRef]

Ullal, C. K.

Villeneuve, P. R.

S. Fan, P. R. Villeneuve and J. D. Joannopoulos, "High extraction efficiency of spontaneous emission from slabs of photonic crystals," Phys. Rev. Lett. 78, 3294-3297 (1997)
[CrossRef]

Vuckovic, J.

J. Vuckovic, M. Loncar and A. Scherer, "Surface plasmon enhanced light-emitting diodes," IEEE J. Quantum Electron. 36, 1131-1144 (2000).
[CrossRef]

Vuckovic, J. S.

Wasey, J. A.

L. H. Smith, J. A. Wasey, W. L. Barnes, "Light outcoupling efficiency of top-emitting organic light-emitting diodes, " Appl. Phys. Lett. 84, 2986-2988 (2004).
[CrossRef]

Wasey, J. A. E.

P. A. Hobson, S. Wedge, J. A. E. Wasey, I. Sage and W. L. Barnes, "Surface plasmon mediated emission from organic light-emitting diodes," Adv. Mater. 14, 1393-1396 (2002).
[CrossRef]

Weber, W. H.

G. W. Ford and W. H. Weber, "Electromagnetic interactions of molecules with metal surfaces," Phys. Rep. 113, 195-287 (1984).
[CrossRef]

Wedge, S.

P. A. Hobson, S. Wedge, J. A. E. Wasey, I. Sage and W. L. Barnes, "Surface plasmon mediated emission from organic light-emitting diodes," Adv. Mater. 14, 1393-1396 (2002).
[CrossRef]

Worthing, P. T.

P. T. Worthing and W. L. Barnes, "Efficient coupling of surface plasmon polaritons to radiation using a bi-grating," Appl. Phys. Lett. 79, 3035-3037 (2001).
[CrossRef]

Xu, Y.

Yariv, A

Yashiro, M.

T. Tsutsui, M. Yashiro, H. Yokogawa, K. Kawano, M. Yokoyama, "Doubling coupling-out efficiency in organic light-emitting devices using a thin silica aerogel layer," Adv. Mater.,  13, 1149-1152 (2001)
[CrossRef]

Yokogawa, H.

T. Tsutsui, M. Yashiro, H. Yokogawa, K. Kawano, M. Yokoyama, "Doubling coupling-out efficiency in organic light-emitting devices using a thin silica aerogel layer," Adv. Mater.,  13, 1149-1152 (2001)
[CrossRef]

Yokoyama, M.

T. Tsutsui, M. Yashiro, H. Yokogawa, K. Kawano, M. Yokoyama, "Doubling coupling-out efficiency in organic light-emitting devices using a thin silica aerogel layer," Adv. Mater.,  13, 1149-1152 (2001)
[CrossRef]

Adv. Chem. Phys. (1)

R. R. Chance, A. Prock and R. Silbey, "Molecular fluorescence and energy transfer near interfaces," Adv. Chem. Phys. 37, 1-65 (1978).

Adv. Mater. (2)

P. A. Hobson, S. Wedge, J. A. E. Wasey, I. Sage and W. L. Barnes, "Surface plasmon mediated emission from organic light-emitting diodes," Adv. Mater. 14, 1393-1396 (2002).
[CrossRef]

T. Tsutsui, M. Yashiro, H. Yokogawa, K. Kawano, M. Yokoyama, "Doubling coupling-out efficiency in organic light-emitting devices using a thin silica aerogel layer," Adv. Mater.,  13, 1149-1152 (2001)
[CrossRef]

Appl. Opt. (4)

Appl. Phys. Lett. (6)

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