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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 38, Iss. 23 — Dec. 1, 2013
  • pp: 5020–5023

Tailoring the hole-injection layer in organic light-emitting devices by introducing Au@SiO2 nanoparticles

Qing Lou, Wenyu Ji, Qinghui Zeng, and Dandan Zhang  »View Author Affiliations

Optics Letters, Vol. 38, Issue 23, pp. 5020-5023 (2013)

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A simple and efficient method to improve the internal and external quantum efficiency of phosphorescent organic light-emitting devices (PhOLEDs) is demonstrated, i.e., combining the localized surface plasmon (LSP) and optical scattering effects by introducing gold nanoparticles (NPs) coated by SiO2 (named as Au@SiO2). The effects of LSP and optical scattering on PhOLEDs are studied. The lifetime of the triplet exciton in the device is modified by surface plasmon coupling induced by Au@SiO2 NPs, which results in increased internal quantum efficiency of the NP-containing devices. The optical scattering effect induced by Au@SiO2 NPs enhances the light outcoupling efficiency of the PhOLEDs and is demonstrated by measuring the angularly resolved photoluminescence. As a result, a PhOLED with 101% improved efficiency and 21% reduced efficiency roll-off is achieved using the composite HTL.

© 2013 Optical Society of America

OCIS Codes
(230.0250) Optical devices : Optoelectronics
(230.3670) Optical devices : Light-emitting diodes
(240.0310) Optics at surfaces : Thin films
(290.5850) Scattering : Scattering, particles
(250.5403) Optoelectronics : Plasmonics

ToC Category:
Optical Devices

Original Manuscript: August 14, 2013
Revised Manuscript: September 17, 2013
Manuscript Accepted: October 27, 2013
Published: November 22, 2013

Qing Lou, Wenyu Ji, Qinghui Zeng, and Dandan Zhang, "Tailoring the hole-injection layer in organic light-emitting devices by introducing Au@SiO2 nanoparticles," Opt. Lett. 38, 5020-5023 (2013)

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