Structure, optical and electro-optical properties of polycrystalline WO3 and MoO3 thin films prepared by chemical vapour deposition

Donnadieu, A.; Davazoglou, Dimitris; Abdellaoui, A.

doi:10.1016/0040-6090(88)90158-7

Cited by 76 publications

(27 citation statements)

References 11 publications

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“…On the other hand, Ni(OH) 2 thin film is also known to exhibit the electrochromic behavior between colorless and brown, where formation of NiOOH from Ni(OH) 2 and its reduction via proton and electron transfer (Ni(OH) 2 § NiOOH + H + + e ¹ ) have been proposed from cyclic voltammetry and infrared absorption spectroscopy. 12,13 Similar electrochromic transitions have been reported for various inorganic materials, such as MoO 3 (colorless-blue), 10,11,14 V 2 O 5 (yellow-blue), 4,5 and Ir(OH) x (blackcolorless). 15,16 The nickel borate compounds Ni 3 (BO 3 ) 2 and Ni(BO 2 ) 2 have been investigated as candidates for several applications based on this unique behavior.…”

Section: Introductionmentioning

confidence: 93%

“…[1][2][3][4][5][6][7][8] Among these, amorphous WO 3 is one of the most well-known electrochromic substances. 4,5,[9][10][11] The reversible transition of a WO 3 film between colorless and blue results from the formation of M x WO 3 (M = H, Li, Na; x = 0-1) during reduction. On the other hand, Ni(OH) 2 thin film is also known to exhibit the electrochromic behavior between colorless and brown, where formation of NiOOH from Ni(OH) 2 and its reduction via proton and electron transfer (Ni(OH) 2 § NiOOH + H + + e ¹ ) have been proposed from cyclic voltammetry and infrared absorption spectroscopy.…”

Section: Introductionmentioning

confidence: 99%

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Electrochromic Characteristics of a Nickel Borate Thin Film Investigated by In Situ XAFS and UV/vis Spectroscopy

et al. 2014

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The electrochromic transition of a nickel borate thin film between colorless and brown was examined by means of in situ XAFS and UV/vis spectroscopy. The XAFS spectra showed that the average valence state of the nickel species in the film changed from +2.1 to +3.8 following the application of an electrode potential. Additionally, a broad peak at 700 nm was observed during in situ UV/vis absorption measurements on the application of a positive potential. These results suggest that the nickel borate film reversibly forms a NiOOH structure with a domain size of several nanometers during the electrochromic reaction.

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Section: Introductionmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Electrochromic Characteristics of a Nickel Borate Thin Film Investigated by In Situ XAFS and UV/vis Spectroscopy

et al. 2014

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“…This process gave a low Eg [100]. Crystallized films produced by sputtering shows band gap of 2.9 eV [101] and by chemical vapour deposition showed a band gap of 3.2 eV [102]. A thickness dependent change in the crystalline or tungsten oxide films made by anodizing is observed with the band gap values of 3.05 and 3.73 eV [103].…”

Section: Review Articlementioning

confidence: 84%

A Review on WO3 films prepared by various methods

2015

Appl. Sci. Lett.

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Recent developments in the synthesis of transition metal oxides in the form of thin films have opened up opportunities in the construction of electrochromic devices with enhanced properties. Transition metal oxides like WO3 and MoO3 have good electrochromic properties and these oxides can also change their optical properties when a voltage pulse is applied. These electrochromic materials are used for displays, gas sensors, rear-view mirrors and smart windows for energy saving applications. There are numbers of different techniques used for the deposition of stable thin films of these oxide materials. Tungsten Oxide (WO3) is the best suited material for energy conservation applications. Thin films of WO3 are deposited by various techniques that offers flexibility, allows the fabrication of required topographical, physical, crystallographic, desired geometrical and metallurgical structures. This review paper is aimed to summarize applications of WO3 thin films as an electrochromic material and the effect of various deposition techniques on its electrochromic and optical properties.

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“…It is well known [1][2][3][4][5], that transitional metal oxides such as Fe 2 O 3Àx (0 x 1), MoO x (2 x 3) demonstrated semiconductor, electrochromic and photochromic properties. These properties of such materials make them quite up-to-date materials as functional materials for photo-thermo-tenso converters and sensors.…”

Section: Introductionmentioning

confidence: 99%