skip to main content
DOE Patents title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Soft lithography microlens fabrication and array for enhanced light extraction from organic light emitting diodes (OLEDs)

Abstract

Provided are microlens arrays for use on the substrate of OLEDs to extract more light that is trapped in waveguided modes inside the devices and methods of manufacturing same. Light extraction with microlens arrays is not limited to the light emitting area, but is also efficient in extracting light from the whole microlens patterned area where waveguiding occurs. Large microlens array, compared to the size of the light emitting area, extract more light and result in over 100% enhancement. Such a microlens array is not limited to (O)LEDs of specific emission, configuration, pixel size, or pixel shape. It is suitable for all colors, including white, for microcavity OLEDs, and OLEDs fabricated directly on the (modified) microlens array.

Inventors:
; ; ; ; ; ;
Issue Date:
Research Org.:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1133638
Patent Number(s):
8,742,406
Application Number:
13/397,749
Assignee:
Iowa State University Research Foundation, Inc. (Ames, IA)
DOE Contract Number:  
AC02-07CH11358
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; 42 ENGINEERING

Citation Formats

Leung, Wai Y., Park, Joong-Mok, Gan, Zhengqing, Constant, Kristen P., Shinar, Joseph, Shinar, Ruth, and ho, Kai-Ming. Soft lithography microlens fabrication and array for enhanced light extraction from organic light emitting diodes (OLEDs). United States: N. p., 2014. Web.
Leung, Wai Y., Park, Joong-Mok, Gan, Zhengqing, Constant, Kristen P., Shinar, Joseph, Shinar, Ruth, & ho, Kai-Ming. Soft lithography microlens fabrication and array for enhanced light extraction from organic light emitting diodes (OLEDs). United States.
Leung, Wai Y., Park, Joong-Mok, Gan, Zhengqing, Constant, Kristen P., Shinar, Joseph, Shinar, Ruth, and ho, Kai-Ming. Tue . "Soft lithography microlens fabrication and array for enhanced light extraction from organic light emitting diodes (OLEDs)". United States. https://www.osti.gov/servlets/purl/1133638.
@article{osti_1133638,
title = {Soft lithography microlens fabrication and array for enhanced light extraction from organic light emitting diodes (OLEDs)},
author = {Leung, Wai Y. and Park, Joong-Mok and Gan, Zhengqing and Constant, Kristen P. and Shinar, Joseph and Shinar, Ruth and ho, Kai-Ming},
abstractNote = {Provided are microlens arrays for use on the substrate of OLEDs to extract more light that is trapped in waveguided modes inside the devices and methods of manufacturing same. Light extraction with microlens arrays is not limited to the light emitting area, but is also efficient in extracting light from the whole microlens patterned area where waveguiding occurs. Large microlens array, compared to the size of the light emitting area, extract more light and result in over 100% enhancement. Such a microlens array is not limited to (O)LEDs of specific emission, configuration, pixel size, or pixel shape. It is suitable for all colors, including white, for microcavity OLEDs, and OLEDs fabricated directly on the (modified) microlens array.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2014},
month = {6}
}

Patent:

Save / Share:

Works referenced in this record:

Apparatus having a photonic crystal
patent-application, August 2006


Synthesis and Magnetic Behavior of Periodic Nickel Sphere Arrays
journal, September 2003

  • Xu, L.; Tung, L. D.; Spinu, L.
  • Advanced Materials, Vol. 15, Issue 18, p. 1562-1564
  • DOI: 10.1002/adma.200305030

TiO2 Inverse Opals Fabricated Using Low-Temperature Atomic Layer Deposition
journal, April 2005

  • King, J. S.; Graugnard, E.; Summers, C. J.
  • Advanced Materials, Vol. 17, Issue 8, p. 1010-1013
  • DOI: 10.1002/adma.200400648

Experimental observation of photonic-crystal emission near a photonic band edge
journal, July 2003

  • Lin, Shawn-Yu; Fleming, J. G.; El-Kady, I.
  • Applied Physics Letters, Vol. 83, Issue 4
  • DOI: 10.1063/1.1594263

High-filling-fraction inverted ZnS opals fabricated by atomic layer deposition
journal, September 2003

  • King, J. S.; Neff, C. W.; Summers, C. J.
  • Applied Physics Letters, Vol. 83, Issue 13
  • DOI: 10.1063/1.1609240

Metallic photonic crystals
journal, January 2002


Electrodeposited nickel and gold nanoscale metal meshes with potentially interesting photonic properties
journal, January 2000

  • Xu, Lianbin; Wiley, John B.; Zhou, Weilie L.
  • Chemical Communications, Issue 12
  • DOI: 10.1039/B000404I

Extraordinary emission from two-dimensional plasmonic-photonic crystals
journal, July 2005

  • Puscasu, Irina; Pralle, M.; McNeal, M.
  • Journal of Applied Physics, Vol. 98, Issue 1, Article No. 013531
  • DOI: 10.1063/1.1947899

Formation of Zinc Inverted Opals on Indium Tin Oxide and Silicon Substrates by Electrochemical Deposition
journal, October 2004

  • Juárez, Beatriz H.; López, Cefe; Alonso, Concepción
  • The Journal of Physical Chemistry B, Vol. 108, Issue 43
  • DOI: 10.1021/jp047475n

Metallic tunable photonic crystal filter for terahertz frequencies
journal, January 2003

  • Drysdale, Timothy D.; Mills, Gordon; Ferguson, Susan M.
  • Journal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures, Vol. 21, Issue 6
  • DOI: 10.1116/1.1622942

Fabrication of three-dimensional photonic structures with submicrometer resolution by x-ray lithography
journal, January 2000

  • Cuisin, C.; Chelnokov, A.; Lourtioz, J. -M.
  • Journal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures, Vol. 18, Issue 6
  • DOI: 10.1116/1.1319825

Fabrication of 3D metallic photonic crystals by X-ray lithography
journal, June 2003


All-metallic three-dimensional photonic crystals with a large infrared bandgap
journal, May 2002

  • Fleming, J. G.; Lin, S. Y.; El-Kady, I.
  • Nature, Vol. 417, Issue 6884, p. 52-55
  • DOI: 10.1038/417052a

Resonant-cavity enhanced thermal emission
journal, August 2005

  • Celanovic, Ivan; Perreault, David; Kassakian, John
  • Physical Review B, Vol. 72, Issue 7, Article No. 075127
  • DOI: 10.1103/PhysRevB.72.075127

Coherent Thermal Antenna Using a Photonic Crystal Slab
journal, March 2006


Carbon Structures with Three-Dimensional Periodicity at Optical Wavelengths
journal, October 1998


Two-Polymer Microtransfer Molding for Highly Layered Microstructures
journal, October 2005

  • Lee, J.-H.; Kim, C.-H.; Ho, K.-M.
  • Advanced Materials, Vol. 17, Issue 20, p. 2481-2485
  • DOI: 10.1002/adma.200500721

Woodpile Metallic Photonic Crystals Fabricated by Using Soft Lithography for Tailored Thermal Emission
journal, March 2007

  • Lee, J.-H.; Kim, Y.-S.; Constant, K.
  • Advanced Materials, Vol. 19, Issue 6, p. 791-794
  • DOI: 10.1002/adma.200602550

Applications of thin film reflecting coating technology to tungsten filament lamps
journal, January 1993

  • Bergman, R. S.; Parham, T. G.
  • IEE Proceedings A Science, Measurement and Technology, Vol. 140, Issue 6
  • DOI: 10.1049/ip-a-3.1993.0066

Design of a hot mirror: contest results
journal, January 1996


Photonic band structures solved by a plane-wave-based transfer-matrix method
journal, April 2003


Optical microcavities in condensed matter systems
journal, October 1994


Enhanced light out-coupling of organic light-emitting devices using embedded low-index grids
journal, July 2008


Diffracted moiré fringes as analysis and alignment tools for multilayer fabrication in soft lithography
journal, May 2005

  • Lee, Jae-Hwang; Kim, Chang-Hwan; Kim, Yong-Sung
  • Applied Physics Letters, Vol. 86, Issue 20
  • DOI: 10.1063/1.1927268

Ceramic-Metal Interpenetrating Network Composites Formed by Electrodeposition
journal, January 2005

  • Wei, X.; Atkinson, A.
  • Journal of The Electrochemical Society, Vol. 152, Issue 8
  • DOI: 10.1149/1.1938027

Colloidal crystal templating of three-dimensionally ordered macroporous solids: materials for photonics and beyond
journal, December 2001

  • Stein, Andreas; Schroden, Rick C.
  • Current Opinion in Solid State and Materials Science, Vol. 5, Issue 6, p. 553-564
  • DOI: 10.1016/S1359-0286(01)00022-5

Fabrication of multi-layered inverse opals using laser-assisted imprinting
journal, July 2005


Electrochemical Fabrication of 3D Microperiodic Porous Materials
journal, April 2001


Organic light-emitting devices (OLEDs) and OLED-based chemical and biological sensors: an overview
journal, June 2008


A review on the light extraction techniques in organic electroluminescent devices
journal, November 2009


11.4: Coupling Efficiency Enhancement of Organic Light Emitting Devices with Refractive Microlens Array on High Index Glass Substrate
journal, January 2004

  • Peng, H. J.; Ho, Y. L.; Qiu, C. F.
  • SID Symposium Digest of Technical Papers, Vol. 35, Issue 1
  • DOI: 10.1889/1.1825995

Coupling Efficiency Enhancement in Organic Light-Emitting Devices Using Microlens Array—Theory and Experiment
journal, December 2005


Surface-plasmon-enhanced light emitters based on InGaN quantum wells
journal, August 2004

  • Okamoto, Koichi; Niki, Isamu; Shvartser, Alexander
  • Nature Materials, Vol. 3, Issue 9
  • DOI: 10.1038/nmat1198

Improvement of output coupling efficiency of organic light-emitting diodes by backside substrate modification
journal, March 2000

  • Madigan, C. F.; Lu, M. -H.; Sturm, J. C.
  • Applied Physics Letters, Vol. 76, Issue 13
  • DOI: 10.1063/1.126124

Patterned microlens array for efficiency improvement of small-pixelated organic light-emitting devices
journal, January 2008

  • Lin, Hoang-Yan; Ho, Yu-Hsuan; Lee, Juin-Haw
  • Optics Express, Vol. 16, Issue 15
  • DOI: 10.1364/OE.16.011044

Coherent two-dimensional lasing action in surface-emitting laser with triangular-lattice photonic crystal structure
journal, July 1999

  • Imada, Masahiro; Noda, Susumu; Chutinan, Alongkarn
  • Applied Physics Letters, Vol. 75, Issue 3
  • DOI: 10.1063/1.124361

Angular Dependence of the Emission from a Conjugated Polymer Light-Emitting Diode: Implications for efficiency calculations
journal, June 1994

  • Greenham, Neil C.; Friend, Richard H.; Bradley, Donal D. C.
  • Advanced Materials, Vol. 6, Issue 6, p. 491-494
  • DOI: 10.1002/adma.19940060612

High Extraction Efficiency of Spontaneous Emission from Slabs of Photonic Crystals
journal, April 1997


Optical thin-film materials with low refractive index for broadband elimination of Fresnel reflection
journal, March 2007