Characterization of MAPLE deposited WO3 thin films for electrochromic applications

INERA Workshop 2016: Membrane and Liquid Crystal Nanostructures

Boyadjiev, S.I.^1,2 ; Stefan, N.^3 ; Szilágyi, I.M.^2,4 ; Mihailescu, N.^3 ; Visan, A.^3 ; Mihailescu, I.N.^3 ; Stan, G.E.^5 ; Besleaga, C.^5 ; Iliev, M.T.^1,6 ; Gesheva, K.A.^7

Institute of Solid State Physics, Bulgarian Academy of Sciences, 72 Tzarigradsko chaussee Blvd., Sofia

1784, Bulgaria^1

MTA-BME Technical Analytical Chemistry Research Group, Szent Gellért tér 4., Budapest

H-1111, Hungary^2

National Institute for Lasers, Plasma and Radiation Physics, 409 Atomistilor Street, Magurele-Ilfov

RO-77125, Romania^3

Budapest University of Technology and Economics, Department of Inorganic and Analytical Chemistry, 4 Megyetem Rakpart, Budapest

H-1111, Hungary^4

National Institute of Materials Physics, 405A Atomistilor Street, Magurele-Ilfov

RO-077125, Romania^5

Sofia University St. Kliment Ohridski, 5 James Bourchier Blvd., Sofia

1164, Bulgaria^6

Central Laboratory of Solar Energy and New Energy Sources, Bulgarian Academy of Sciences, 72 Tzarigradsko chaussee Blvd., Sofia

1784, Bulgaria^7

关键词: Electro-chromic applications;    Electrochromic layers;    Electrochromic properties;    Grazing-incidence X-ray diffraction;    Matrix assisted pulsed laser evaporation;    Nano-sized particles;    Structural investigation;    Voltammetry measurements;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/780/1/012013/pdf
DOI  :  10.1088/1742-6596/780/1/012013

来源: IOP

【 摘 要 】

Tungsten trioxide (WO3) is a widely studied material for electrochromic applications. The structure, morphology and optical properties of WO3thin films, grown by matrix assisted pulsed laser evaporation (MAPLE) from monoclinic WO3nano-sized particles, were investigated for their possible application as electrochromic layers. A KrF∗ excimer (λ=248 nm, ζFWHM=25 ns) laser source was used in all experiments. The MAPLE deposited WO3thin films were studied by atomic force microscopy (AFM), grazing incidence X-ray diffraction (GIXRD) and Fourier transform infrared spectroscopy (FTIR). Cyclic voltammetry measurements were also performed, and the coloring and bleaching were observed. The morpho-structural investigations disclosed the synthesis of single-phase monoclinic WO3films consisting of crystalline nano-grains embedded in an amorphous matrix. All thin films showed good electrochromic properties, thus validating application of the MAPLE deposition technique for the further development of electrochromic devices.