Gas sensor for detecting volatile organic compounds and method for manufacturing same
AssigneeLG Electronics Inc.
InventorMasaki Takada
Life of this patent
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Abstract
Discussed is a gas sensor for detecting volatile organic compounds, the gas sensor including a substrate including a non-conductive material, an electrode located on the substrate and including a conductive material, and a sensing layer configured to be in contact with at least a portion of the electrode or to cover the electrode, the sensing layer reacting to a predetermined gas, wherein the sensing layer includes a compound of SnO2 with an alkali metal oxide or an alkaline earth metal oxide. The sensing layer specifically reacts to formaldehyde among volatile organic compounds. When the sensing layer detects formaldehyde by connecting electrodes to each other, the sensing layer can detect the formaldehyde by checking a change in current in the electrode.
Claims16
A gas sensor for detecting volatile organic compounds, the gas sensor comprising:
- a substrate including a non-conductive material;
- at least one pair of electrodes located on the substrate and including a conductive material, the at least one pair of electrodes being electrically connected to an outside;
- and
- a sensing layer configured to be in contact with at least a portion of the at least one pair of electrodes or to cover the at least one pair of electrodes, the sensing layer reacting to a formaldehyde,
- wherein the sensing layer comprises Mg—SnO2.
A gas sensor for detecting volatile organic compounds, the gas sensor comprising:
- a substrate including a non-conductive material;
- a sensing layer located on the substrate, the sensing layer reacting to formaldehyde, and the sensing layer being made of Mg—Sno2;
- and
- at least one pair of electrodes including a conductive material and configured to detect electron movement and capacitance inside the sensing layer, the at least one pair of electrodes being electrically connected to an outside,
- wherein the at least one pair of electrodes comprise a first electrode including a conductive material, and a second electrode configured to supply conduct an electric current to the first electrode or to conduct an electric current from the first electrode, and
- wherein the sensing layer connects the first electrode with the second electrode and is configured to expose at least a portion of each of the first electrode and the second electrode to air.
A method for manufacturing a gas sensor for detecting volatile organic compounds, with the gas sensor having a sensing layer configured to connect electrodes to each other formed on a substrate, the method comprising:
- forming the electrodes using indium tin oxide (ITO), and
- forming the sensing layer by using Mg—SnO2,
- wherein the sensing layer is formed by dispersing and applying the Mg—SnO2 onto a mixed solution of pure water and glycerin and heating the mixed solution, onto which the Mg—SnO2 is applied, to a predetermined temperature.
Dependencies are inferred from the claim text.