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Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 36, Iss. 14 — Jul. 15, 2011
  • pp: 2635–2637

Simultaneous efficiency enhancement and self-cleaning effect of white organic light-emitting devices by flexible antireflective films

Dong Wu, Yong-Biao Zhao, Si-Zhu Wu, Yue-Feng Liu, Hao Zhang, Shuai Zhao, Jing Feng, Qi-Dai Chen, Dong-Ge Ma, and Hong-Bo Sun  »View Author Affiliations


Optics Letters, Vol. 36, Issue 14, pp. 2635-2637 (2011)
http://dx.doi.org/10.1364/OL.36.002635


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Abstract

In this Letter, we report the improved light outcoupling efficiency of conventional white organic light-emitting devices (OLEDs) by a kind of multifunctional film with both antireflective and superhydrophobic ability. This film consisted of regular polydimethylsiloxane (PDMS) nanopillar arrays, which were readily batch produced by low-cost imprint lithography. The nanopillar arrays could effectively eliminate the light total reflection and enhance the device efficiency of OLEDs by producing the gradual refractive index due to the decreasing material density from glass to air. Moreover, owing to its superhydrophobicity (contact angle 151 ° ), the antireflective film exhibited self-cleaning ability, which was beneficial for keeping the OLEDs substrate clean and ensure the high efficiency of OLEDs. This method is simple, cost-effective, and reproducible. The OLEDs showed an efficiency enhancement of 25% with the multifunctional film.

© 2011 Optical Society of America

OCIS Codes
(090.2880) Holography : Holographic interferometry
(230.3670) Optical devices : Light-emitting diodes
(310.1210) Thin films : Antireflection coatings
(310.6628) Thin films : Subwavelength structures, nanostructures

ToC Category:
Optical Devices

History
Original Manuscript: April 21, 2011
Revised Manuscript: June 12, 2011
Manuscript Accepted: June 14, 2011
Published: July 12, 2011

Citation
Dong Wu, Yong-Biao Zhao, Si-Zhu Wu, Yue-Feng Liu, Hao Zhang, Shuai Zhao, Jing Feng, Qi-Dai Chen, Dong-Ge Ma, and Hong-Bo Sun, "Simultaneous efficiency enhancement and self-cleaning effect of white organic light-emitting devices by flexible antireflective films," Opt. Lett. 36, 2635-2637 (2011)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-36-14-2635


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