White organic light emitting diodes with enhanced internal and external outcoupling for ultra-efficient light extraction and Lambertian emission

Optics Express

Volumn 20, Issue 106, 2012, Pages A932-A940

  Bocksrocker, Tobias ^a   Preinfalk, Jan Benedikt ^a   Asche Tauscher, Preinfalk ^a   Pargner, Andreas ^a   Eschenbaum, Carsten ^a   Maier Flaig, Florian ^a   Lemmer, Uli ^a  

^a KARLSRUHE INSTITUTE OF TECHNOLOGY   (Germany)

Author keywords

[No Author keywords available]

Indexed keywords

DEVICE EFFICIENCY; EFFICIENCY ENHANCEMENT; ENHANCEMENT FACTOR; HIGH QUALITY; LAMBERTIAN; LIGHT EXTRACTION; MICRO-LENS; OUT-COUPLING EFFICIENCY; SPECTRAL DEPENDENCY; TIO; WHITE EMISSIONS; WHITE ORGANIC LIGHT EMITTING DIODES;

EFFICIENCY; INTERFACES (MATERIALS); OPTOELECTRONIC DEVICES; TITANIUM DIOXIDE;

ORGANIC LIGHT EMITTING DIODES (OLED);

EID: 84869064430     PISSN: None     EISSN: 10944087     Source Type: Journal    
DOI: 10.1364/OE.20.00A932     Document Type: Article

References (24)

1. M. C. Gather, A. Kohnen, and K. Meerholz, “White Organic Light-Emitting Diodes,” Adv. Mater. (Deerfield Beach Fla.) 23, 33-248 (2010).
2. S. Reineke, F. Lindner, G. Schwartz, N. Seidler, K. Walzer, B. Luessem, and K. Leo, “White organic light-emitting diodes with fluorescent tube efficiency,” Nature 459, 234-238 (2009).
3. C. Adachi, M. Baldo, M. Thompson, and S. Forrest, “Nearly 100% internal phosphorescence efficiency in an organic light-emitting device,” J. Appl. Phys. 90(10), 5048-5505 (2001).
4. N. Chopra, J. Lee, J. Xue, and F. So, “High-Efficiency Blue Emitting Phosphorescent OLEDs,” IEEE Trans Electron. Dev. 57, 101-107 (2010).
5. S. O. Jeon, S. E. Jang, H. S. Son, and J. Y. Lee, “External Quantum Efficiency Above 20% in Deep Blue Phosphorescent Organic Light-Emitting Diodes,” Adv. Mater. (Deerfield Beach Fla.) 23(12), 1436-1441 (2011).
6. H. Greiner, “Light Extraction from Organic Light Emitting Diode Substrates: Simulation and Experiment,” Jpn. J. Appl. Phys. 46(7A), 4125-4137 (2007).
7. H. Kim, C. M. Gilmore, A. Piqué, J. S. Horwitz, H. Mattoussi, J. Murata, Z. H. Kafafi, and D. B. Chrisey, “Electrical, optical, and structural properties of indium-tin-oxide thin films for organic light-emitting devices,” J. Appl. Phys. 86(11), 6451-6461 (1999).
8. K. Saxena, V. K. Jain, and D. S. Mehta, “A review on the light extraction techniques in organic electroluminescent devices,” Opt. Mater. 32(1), 221-233 (2009).
9. N. Patel, S. Cina, and J. Burroughes, “High-efficiency organic light-emitting diodes,” IEEE J. Sel. Top. Quantum Electron. 8(2), 346-361 (2002).
10. J. Zhou, N. Ai, L. Wang, H. Zheng, C. Luo, Z. Jiang, S. Yu, Y. Cao, and J. Wang, “Roughening the white OLED substrate's surface through sandblasting to improve the external quantum efficiency,” Org. El. 12(4), 648-653 (2011).
11. J. Shiang, T. Faircloth, and A. Duggal, “Experimental demonstration of increased organic light emitting device output via volumetric light scattering,” J. Appl. Phys. 95(5), 2889-2895 (2004).
12. Y. Sun and S. R. Forrest, “Organic light emitting devices with enhanced outcoupling via microlenses fabricated by imprint lithography,” J. Appl. Phys. 100(7), 073106 (2006).
13. K. H. Liu, M. F. Chen, C. T. Pan, M. Y. Chang, and W. Y. Huang, “Fabrication of various dimensions of high fill-factor micro-lens arrays for OLED package,” Sens. and Act. A. 159, 126-134 (2010).
14. B. Riedel, J. Hauss, M. Aichholz, A. Gall, U. Lemmer, and M. Gerken, “Polymer light emitting diodes containing nanoparticle clusters for improved efficiency,” Org. Electron. 11(7), 1172-1175 (2010).
15. Y. Sun and S. Forrest, “Enhanced light out-coupling of organic light-emitting devices using embedded low-index grids,” Nat. Photonics 2(8), 483-487 (2008).
16. W. H. Koo, S. M. Jeong, F. Araoka, K. Ishikawa, S. Nishimura, T. Toyooka, and H. Takezoe, “Light extraction from organic light-emitting diodes enhanced by spontaneously formed buckles,” Nat. Photonics 4(4), 222-226 (2010).
17. 2-columns,” Opt. Express 20(6), 6170-6174 (2012).
18. U. Geyer, J. Hauss, B. Riedel, S. Gleiss, U. Lemmer, and M. Gerken, “Large-scale patterning of indium tin oxide electrodes for guided mode extraction from organic light-emitting diodes,” J. Appl. Phys. 104(9), 093111 (2008).
19. B. Riedel, J. Hauss, U. Geyer, J. Guetlein, U. Lemmer, and M. Gerken, “Enhancing outcoupling efficiency of indium-tin-oxide-free organic light-emitting diodes via nanostructured high index layers,” Appl. Phys. Lett. 96(24), 243-302 (2010).
20. J. Hauss, T. Bocksrocker, B. Riedel, U. Lemmer, and M. Gerken, “Metallic Bragg-gratings for light management in organic light-emitting devices,” Appl. Phys. Lett. 99(10), 103-303 (2011).
21. J. Lupton, B. Matterson, I. Samuel, M. Jory, and W. Barnes, “Bragg scattering from periodically microstructured light emitting diodes,” Appl. Phys. Lett. 77(21), 3340-3342 (2000).
22. J. Ziebarth, A. Saafir, S. Fan, and M. McGehee, “Extracting light from polymer light-emitting diodes using stamped Bragg gratings,” Adv. Funct. Mater. 14(5), 451-456 (2004).
23. M. Fujita, K. Ishihara, T. Ueno, T. Asano, S. Noda, H. Ohata, T. Tsuji, H. Nakada, and N. Shimoji, “Optical and electrical characteristics of organic light-emitting diodes with two-dimensional photonic crystals in organic/electrode layers,” Jpn. J. Appl. Phys. 44(6A), 3669-3677 (2005).
24. J. Hauss, T. Bocksrocker, B. Riedel, U. Lemmer, and M. Gerken, “On the interplay of waveguide modes and leaky modes in corrugated OLEDs,” Opt. Express 19(S4 Suppl 4), A851-A858 (2011)