Tungsten Oxide Film Transmission Spectrum

The transmission spectrum of tungsten trioxide film is a standard for studying the photochromic ability of tungsten trioxide film. The principle is perpendicular to the electromagnetic radiation beam through the transparent electrode, into the diffusion layer of tungsten oxide electrolyte and bulk solution.

Or transmitted through a diffusion layer parallel to the electrode, reacting the light-absorbing tungsten trioxide. After measuring the absorbance of tungsten trioxide thin film, you can get real-time information about the spectrum of the tungsten trioxide film in the electrode surface diffusion layer or bulk solution. This is the earliest Spectro electrochemical method used to study the reactants of reactants, the spectral properties between products, and to obtain the thermodynamic and kinetic properties of electrode reactions.

Potentiostatic polarization in solution gives the transmission spectra of the tinted and discolored states of tungsten trioxide. The original tungsten trioxide film is a transparent film. When potentiostatic polarization is applied at a voltage of -1 V, the tungsten trioxide film changes from clear to dark blue. When using a reverse voltage of 1.5V, the tungsten trioxide film faded from dark blue to clear.

Its original state, the state after the insertion of lithium ions and the fading state of the fading state after extraction of lithium ions in the visible light range, we can see that the spectrum in the visible light modulation range up to 80% or more. In the wavelength range by comparing the can be seen that the prepared sample fading state and the original state of the transmission rate is almost the same, to achieve the ideal state of reversibility. Can be seen in the preparation of samples in different states of the photo, the film showed a dark blue color. When placed on top of a normal piece of paper, the font on the paper can hardly be seen. The sample has extremely low transmission and the fading state is almost the same as the original one.

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