Photochromism enhancement in thin RbAg4I5 films using simultaneous hydrogen-induced sensitization

Gavrilyuk, Alexander; Lanskaya, T. G.

doi:10.1134/s1063785006070054

Cited by 2 publications

(8 citation statements)

References 7 publications

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“…In addition, electrical conductivity of V 2 O 5 gel increases with the irradiation time. The mechanism for the change in optical and electrical properties is similar to that for WO 3 and MoO 3 thin films [68,173,201], in which the formation of hydrogen oxide bronze is suggested (equation (14)) [196]. The protons result from the oxidation of adsorbed methanol by holes.…”

Section: Vanadium Pentoxidementioning

confidence: 94%

“…8). Transparent V 2 O 5 gel changes its color in methanol vapor from yellow to dark-green for thinner layers and from red to black for thicker layers [196]. Besides the aforementioned typical characteristics, a wide and structureless non-Gaussian absorption band with a maximum at 0.92 eV (1350 nm) appears.…”

Section: Vanadium Pentoxidementioning

confidence: 97%

“…However, V 2 O 5 thin layers prepared by thermal evaporation do not become more photosensitive when irradiated in methanol vapor [196]. In order to have a relatively high hydrogen injection efficiency, it is claimed [196] that the V 2 O 5 layer should have a large specific surface area, a large number of adsorption centers with intermediate Lewis acidity, a structure suitable for a rapid diffusion of hydrogen atoms through the entire thickness of the layer, and so on. V 2 O 5 gel satisfies all these requirements, while the evaporated film does not.…”

Section: Vanadium Pentoxidementioning

confidence: 99%

“…This dichotomy motivates an in-depth examination of the coloration of V 2 O 5 based films from a fundamental perspective and potential applications in multicolor display devices [195]. Several groups [10,33,196] have studied the photochromic behavior of V 2 O 5 . The thermal evaporated V 2 O 5 films exhibit substantial absorption at energies below the optical width of the energy gap for V 2 O 5 (Fig.…”

Section: Vanadium Pentoxidementioning

confidence: 99%

“…Another reason is that there are two types of channels in WO 3 crystals, both of which are perpendicular to the (001) plane, which coincide with the direction of proton diffusion [39,40,122]. In addition, since organic molecules prefer to be adsorbed on the surface of amorphous layer, a double-layer heterostructure consisting of polycrystalline and amorphous tungsten oxide has been fabricated [41][42][43]. First the hydrogen is injected into the amorphous layer and then migrates into the polycrystalline layer.…”

Section: Influence Factors Of the Photochromismmentioning

confidence: 99%

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Photochromism in transition-metal oxides

He¹,

Yao²

2004

Res. Chem. Intermed.

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Transition-metal oxides -including tungsten oxide, molybdenum oxide, titanium dioxide, vanadium pentoxide, niobium pentoxide and zinc oxide -exhibit photochromism upon bandgap excitation. These oxides constitute an important group of inorganic chromogenic materials, which is of great significance in the perspective of science and technology. During the past several decades, great progresses have been made in the microstructure, photochromic behavior and mechanism of these oxides, specifically of tungsten oxide. These studies underscore the opportunity of using these materials in photonic applications. The details will be presented in this review.

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Section: Vanadium Pentoxidementioning

confidence: 94%

Section: Vanadium Pentoxidementioning

confidence: 97%

Section: Vanadium Pentoxidementioning

confidence: 99%

Section: Vanadium Pentoxidementioning

confidence: 99%

Section: Influence Factors Of the Photochromismmentioning

confidence: 99%

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Photochromism in transition-metal oxides

He¹,

Yao²

2004

Res. Chem. Intermed.

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Photoinjection of hydrogen and the nature of a giant shift of the fundamental absorption edge in highly disordered V2O5 films

Gavrilyuk

Tritthart

Gey

2011

Phys. Chem. Chem. Phys.

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Production of atomic photochemical hydrogen under the action of light and its subsequent injection into transition metal oxides has yielded numerous interesting results. Here we report on the mechanism of the photo-induced hydrogen transfer between adsorbed organic molecules and the surface of highly disordered V(2)O(5) films. We have managed to carry out the photoinjection of hydrogen into the V(2)O(5) films at very low temperatures, which is very important both for investigations of the reaction mechanism and for the optical properties of the V(2)O(5) films. The photochemical reaction exhibits all features of proton-coupled electron transfer which is a basic mechanism for bioenergetics conversion. Second, the new possibility to carry out experiments at very low temperatures has yielded a new approach in investigations of the nature of color centers and of the giant "blue" shift of the fundamental absorption edge in the V(2)O(5) films both arising due to injection of hydrogen atoms.

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Photochromism enhancement in thin RbAg4I5 films using simultaneous hydrogen-induced sensitization

Cited by 2 publications

References 7 publications

Photochromism in transition-metal oxides

Photochromism in transition-metal oxides

Photoinjection of hydrogen and the nature of a giant shift of the fundamental absorption edge in highly disordered V2O5 films

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