Preparation of electrochromic thin films by transformation of manganese(II) carbonate

Stojkovikj, Sasho and Najdoski, Metodija and Koleva, Violeta and Demiri, Sani (2013) Preparation of electrochromic thin films by transformation of manganese(II) carbonate. Journal of Physics and Chemistry of Solids, 74 (10). pp. 1433-1438. ISSN 1879-2553

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Abstract

A new chemical bath method for deposition of manganese(II) carbonate thin film on electroconductive FTO glass substrates is designed. The homogeneous thin films with thickness in the range of 70 to 500 nm are deposited at about 98 °C from aqueous solution containing urea and MnCl2. The chemical process is based on a low temperature hydrolysis of the manganese complexes with urea. Three types of films are under consideration: as-deposited, annealed and electrochemically transformed thin films. The structure of the films is studied by XRD, IR and Raman spectroscopy. Electrochemical and optical properties are examined in eight different electrolytes (neutral and alkaline) and the best results are achieved in two component aqueous solution of 0.1 M KNO3 and 0.01 M KOH. It is established that the as-deposited MnCO3 film undergoes electrochemically transformation into birnessite-type manganese(IV) oxide films, which exhibit electrochromic color changes (from bright brown to pale yellow and vice versa) with 30% difference in the transmittance of the colored and bleached state at 400 nm.

Item Type:	Article
Impact Factor Value:	4
Subjects:	Natural sciences > Chemical sciences Engineering and Technology > Materials engineering Natural sciences > Physical sciences
Divisions:	Faculty of Technology
Depositing User:	Saso Stojkovik
Date Deposited:	01 Mar 2024 09:21
Last Modified:	01 Mar 2024 09:21
URI:	https://eprints.ugd.edu.mk/id/eprint/33795

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