Color-tunable mixed photoluminescence emission from Alq3 organic layer in metal-Alq3-metal surface plasmon structure

Nai-Chuan Chen; Chung-Chi Liao; Cheng-Chang Chen; Wan-Ting Fan; Jin-Han Wu; Jung-Yu Li; Shih-Pu Chen; Bohr-Ran Huang; Li-Ling Lee

doi:10.1186/1556-276X-9-569

Color-tunable mixed photoluminescence emission from Alq3 organic layer in metal-Alq3-metal surface plasmon structure

Nanoscale Res Lett. 2014 Oct 13;9(1):569. doi: 10.1186/1556-276X-9-569. eCollection 2014.

Authors

Nai-Chuan Chen¹, Chung-Chi Liao², Cheng-Chang Chen³, Wan-Ting Fan⁴, Jin-Han Wu³, Jung-Yu Li³, Shih-Pu Chen³, Bohr-Ran Huang⁵, Li-Ling Lee³

Affiliations

¹ Department of Electronic Engineering, Chang Gung University, Tao-Yuan 333, Taiwan ; Institute of Electro-Optical Engineering, Chang Gung University, Tao-Yuan 333, Taiwan.
² Department of Electronic Engineering, National Taiwan University of Science and Technology, Taipei 106, Taiwan.
³ Green Energy and Environment Research Laboratories, Industrial Technology Research Institute (ITRI), 195, Sec. 4, Chung-Hsin Road, Chutung 310, Taiwan.
⁴ Institute of Electro-Optical Engineering, Chang Gung University, Tao-Yuan 333, Taiwan.
⁵ Department of Electronic Engineering, National Taiwan University of Science and Technology, Taipei 106, Taiwan ; Graduate Institute of Electro-Optical Engineering, National Taiwan University of Science and Technology, Taipei 106, Taiwan.

Abstract

This work reports the color-tunable mixed photoluminescence (PL) emission from an Alq3 organic layer in an Au-Alq3-Au plasmonic structure through the combination of organic fluorescence emission and another form of emission that is enabled by the surface plasmons in the plasmonic structure. The emission wavelength of the latter depends on the Alq3 thickness and can be tuned within the Alq3 fluorescent spectra. Therefore, a two-color broadband, color-tunable mixed PL structure was obtained. Obvious changes in the Commission Internationale d'Eclairage (CIE) coordinates and the corresponding emission colors of Au-Alq3-Au samples clearly varied with the Alq3 thickness (90, 130, and 156 nm).

Keywords: Organic light-emitting; Photoluminescence; Surface plasmon polariton; White light.