Influence of molybdenum trioxide thin film thickness on its electrochemical properties. (22nd September 2017)

• Record Type: Journal Article
• Authors: Lemos, R.M.J.; Alcázar, J.C.B.; Carreño, N.L.V.; Andrade, J.; Pawlicka, A.; Kanicki, J.; Gundel, A.; Azevedo, C.F.; Avellaneda, C.O.
• Is Part Of: Molecular crystals and liquid crystals. Volume 655(2017)
• Page Start: 40
• Page End: 50
• Publication Date: 2017-09-22
• Subjects: Electrochromism -- molybdenum trioxide -- spin coating -- sol-gel -- thin films; Molecular crystals -- Periodicals; Liquid crystals -- Periodicals; Liquid crystals; Molecular crystals; Periodicals; 548
• DOI: 10.1080/15421406.2017.1360689
• Languages: English
• ISSNs: 1542-1406

Abstract

ABSTRACT: Molybdenium trioxide (MoO3 ) thin films of one to ten coatings were obtained. The X-ray diffractograms of the xerogels revealed the formation of α-orthorhombic phase of MoO3 with index plane of 020 and crystallite size of 45 nm. The electrochemical reversibility upon Li + intercalation/deintercalation was confirmed by cyclic voltammetry, and the best anodic (Qa = 25 mC cm −2 ) and cathodic charge (Qc = 25.5 mC cm −2 ) ratio of 0.98 was obtained for the nine-layered film. This film changed 43% of its transmittance between blue and transparent states. SEM evidenced a grain structured film surface and 376 nm thickness of nine-layered MoO3 film, and the Atomic Force Microscopy (AFM) showed a dense morphology with roughness of 54 nm.