The First Molecule-Based Blue-Light Optical-Dielectric Switching Material in Both Hybrid Bulk Crystal and Flexible Thin Film Forms

Sandwich and planar structures are fabricated by a vacuum deposition method using iron phthalocyanine chloride (FePcCl) as an active layer and gold (Au) as electrodes. The permittivity ε of FePcCl is determined from the dependence of capacitance on film thickness. The current density voltage characteristics characteristics of the Au/FePcCl/Au structure at room temperature are found. Thermally generated hole concentration p0, hole mobility µp, total trap concentration Nt, and depth of the trap level are estimated. The activation energies of FePcCl films are determined from Arrhenious plots of ln σ versus 1000/T. The absorption and reflectance spectra of a FePcCl thin film deposited at room temperature are recorded in the spectral range 300900 nm. The optical band gap of a FePcCl thin film is determined from the α2 versus hν graph. The optical constants n and k are found. The real and imaginary parts of the optical dielectric constant ε1 and ε2 are calculated. These optical parameters are plotted against photonenergy. PACS Nos.: 72.80.Le, 73., 78.20.e

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Optical characterisation of anatase: a comparative study of the bulk crystal and the polycrystalline thin film

Thin Solid Films ◽

10.1016/s0040-6090(01)01479-1 ◽

2001 ◽

Vol 401 (1-2) ◽

pp. 216-224 ◽

Cited By ~ 38

Author(s):

T.M.R. Viseu ◽

B. Almeida ◽

M. Stchakovsky ◽

B. Drevillon ◽

M.I.C. Ferreira ◽

...

Keyword(s):

Thin Film ◽

Comparative Study ◽

Bulk Crystal ◽

Polycrystalline Thin Film

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The Response of UV/Blue Light and Ozone Sensing Using Ag-TiO2 Planar Nanocomposite Thin Film

Sensors ◽

10.3390/s19235061 ◽

2019 ◽

Vol 19 (23) ◽

pp. 5061 ◽

Cited By ~ 2

Author(s):

Tzu-Hsuan Lo ◽

Pen-Yuan Shih ◽

Chiu-Hsien Wu

Keyword(s):

Thin Film ◽

Silver Nanoparticles ◽

Gas Sensor ◽

Blue Light ◽

Nanocomposite Film ◽

Composite Films ◽

Light Irradiation ◽

Strong Surface ◽

Application Potential ◽

Spr Effect

We successfully fabricated a planar nanocomposite film that uses a composite of silver nanoparticles and titanium dioxide film (Ag-TiO2) for ultraviolet (UV) and blue light detection and application in ozone gas sensor. Ultraviolet-visible spectra revealed that silver nanoparticles have a strong surface plasmon resonance (SPR) effect. A strong redshift of the plasmonic peak when the silver nanoparticles covered the TiO2 thin film was observed. The value of conductivity change for the Ag-TiO2 composite is 4–8 times greater than that of TiO2 film under UV and blue light irradiation. The Ag-TiO2 nanocomposite film successfully sensed 100 ppb ozone. The gas response of the composite film increased by roughly six and four times under UV and blue light irradiation, respectively. We demonstrated that a Ag-TiO2 composite gas sensor can be used with visible light (blue). The planar composite significantly enhances photo catalysis. The composite films have practical application potential for wearable devices.

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