Ultraviolet-induced erasable photochromism in bilayer metal oxide films

Terakado, Nobuaki; Tanaka, Keiji; Nakazawa, Akira

doi:10.1016/j.ssc.2011.05.037

Cited by 8 publications

(3 citation statements)

References 20 publications

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“…Terakado et al [2] conducted transmittance measurements and X-ray diffraction (XRD) analysis on samples consisting of magnesium tin oxide (MTO) spin-coated onto indium tin oxide (ITO) substrates, followed by UV irradiation to induce photochromism. Each analysis was performed for ve scenarios: (a) MTO only, (b) ITO only, (c) MTO/ITO (before UV irradiation), (d) MTO/ITO (after UV irradiation), and (e) MTO/ITO (after heating).…”

Section: Introductionmentioning

confidence: 99%

Humidity and Oxygen Effects on Photochromic Properties of MTO/ITO Thin Films

Inoue,

Matsuo,

Matsumura

2024

Preprint

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The study investigates the photochromic properties of magnesium tin oxide (MTO) films deposited on indium tin oxide (ITO) substrates under various environmental conditions. The photochromic behavior involves the transition of the material to a black state upon ultraviolet (UV) irradiation and its return to transparency upon heating. MTO films deposited on ITO substrates exhibited significant coloration upon UV exposure, with a notable decrease in visible light transmittance. Structural analysis revealed the formation of metallic indium at the MTO/ITO interface during UV irradiation, suggesting a complex reaction mechanism involving oxygen and hydrogen radicals. Investigations into the effects of atmospheric gases and humidity on UV-induced coloration indicated that moisture plays a crucial role in promoting photochromism, while the presence of oxygen influences the degree of coloration. The study provides insights into the underlying processes driving the photochromic phenomenon in MTO/ITO systems and underscores the importance of environmental factors in modulating their optical properties. Further research is warranted to fully elucidate the role of oxygen and its derivatives in the photochromic mechanism of MTO films for potential applications in energy storage devices.

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Section: Introductionmentioning

confidence: 99%

Humidity and Oxygen Effects on Photochromic Properties of MTO/ITO Thin Films

Inoue,

Matsuo,

Matsumura

2024

Preprint

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“…[21][22][23] In recent years, studies on the use of photochromism utilizing the accumulation of carriers at the trap levels of semiconductors have been performed. 24,25) Furthermore, there have been some reports on the use of batteries using the trap levels of oxide semiconductors. [26][27][28][29] A device of particular interest is the Guera battery, which accumulates carriers at the trap levels of oxide semiconductors formed by UV irradiation.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of solid-state secondary battery using semiconductors and evaluation of its charge/discharge characteristics

Sasaki¹,

Sasaki²,

Hirabayashi³

et al. 2018

Jpn. J. Appl. Phys.

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Li-ion batteries have attracted interest for use as storage batteries. However, the risk of fire has not yet been resolved. Although solid Li-ion batteries are possible alternatives, their performance characteristics are unsatisfactory. Recently, research on utilizing the accumulation of carriers at the trap levels of semiconductors has been performed. However, the detailed charge/discharge characteristics and principles have not been reported. In this report, we attempted to form new n-type oxide semiconductor/insulator/p-type oxide semiconductor structures. The battery characteristics of these structures were evaluated by charge/discharge measurements. The obtained results clearly indicated the characteristics of rechargeable batteries. Furthermore, the fabricated structure accumulated an approximately 5000 times larger number of carriers than a parallel plate capacitor. Additionally, by constructing circuit models based on the experimental results, the charge/discharge mechanisms were considered. This is the first detailed experimental report on a rechargeable battery that operates without the double injection of ions and electrons.

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“…Therefore, some researchers speculated that these electrochromic materials could be used in energy-storable solar cells. [32][33][34][35][36][37][38] Terakado et al 39 reported an erasable photochromic bilayer metal oxide film of tin oxide and magnesium oxide. In their paper, they inferred absorption or scattering for electrochromic phenomenon.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of photochromic nanoparticles and determination of the mechanism of photochromism

et al. 2016

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Photochromic nanoparticles of zinc-silicon oxide were synthesized using plasma enhanced chemical vapor deposition. These particles turned black upon irradiating with ultraviolet light. We investigated this phenomenon using density functional theory calculations. Silicon inclusions create trap levels and oxygen defects that reduce the ionization potential of ZnO. This forms a quantum potential between ZnO and zinc-silicon oxide, and the excited electron is stable. Because oxygen defects also increase the bond overlap population between the zinc atoms in a ZnO crystal, they introduce further defects and help in the formation of quantum potentials. Growth of a perfect crystal of ZnO prevents the formation of oxygen defects, which is not desirable for photochromism.

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Ultraviolet-induced erasable photochromism in bilayer metal oxide films

Cited by 8 publications

References 20 publications

Humidity and Oxygen Effects on Photochromic Properties of MTO/ITO Thin Films

Humidity and Oxygen Effects on Photochromic Properties of MTO/ITO Thin Films

Fabrication of solid-state secondary battery using semiconductors and evaluation of its charge/discharge characteristics

Synthesis of photochromic nanoparticles and determination of the mechanism of photochromism

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