Materials, Photonic Devices, and Sensors

Photoluminescence properties of anodic aluminum oxide formed in a mixture of ammonium fluoride and oxalic acid

[+] Author Affiliations
Shou-Yi Li

Hexi University, Institute of New Energy, College of Physics and Electromechanical Engineering, Zhangye Gansu, China

Northwest Normal University, College of Physics and Electronic Engineering, Key Laboratory of Atomic and Molecular Physics and Functional Materials of Gansu Province, Lanzhou, China

Jian Wang, Yan Li

Northwest Normal University, College of Physics and Electronic Engineering, Key Laboratory of Atomic and Molecular Physics and Functional Materials of Gansu Province, Lanzhou, China

Opt. Eng. 56(6), 067107 (Jun 14, 2017). doi:10.1117/1.OE.56.6.067107
History: Received February 22, 2017; Accepted May 25, 2017
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Abstract.  Highly ordered anodic aluminum oxide (AAO) membranes are fabricated electrochemically in an electrolyte mixture with various concentrations of C2H2O4 or NH4F. Photoluminescence (PL) properties of AAO membranes have been investigated before and after annealing in the range from 300°C to 650°C. X-ray diffraction reveals the amorphous nature of AAO membranes. Energy dispersive spectroscopy indicates the presence of fluorine species incorporated in oxide membranes during the anodizing. PL measurements show a strong PL band in the wavelength range of 350 to 550 nm. With the increase of the concentration of the NH4F or C2H2O4 in the electrolyte mixture, the peak positions of the PL bands have a blueshift or redshift and the intensities have a maximum value. As indicated by the PL excitation spectra, there are two excitation peaks of 285 and 330 nm, which can account for the PL emission band. We have proposed that the PL originates from optical transitions in two kinds of centers that are related to oxygen vacancies, F+ (285 nm) and F (330 nm). This work is not only beneficial to further understanding of the light-emitting property of AAO membranes but also enlarges the application scope.

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© 2017 Society of Photo-Optical Instrumentation Engineers

Citation

Shou-Yi Li ; Jian Wang and Yan Li
"Photoluminescence properties of anodic aluminum oxide formed in a mixture of ammonium fluoride and oxalic acid", Opt. Eng. 56(6), 067107 (Jun 14, 2017). ; http://dx.doi.org/10.1117/1.OE.56.6.067107


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