Sumitomo Chemical Company, Limited

Cambridge Display Technology Limited

Daniel Tobjork

Christopher Newsome

Pascal Cachelin

Kiran Timothy Kamtekar

Simon Goddard

Robert Sidney Archer

Nicholas Dartnell

A gas sensor apparatus () comprising a gas inlet (); a first gas sensor (); a first gas flow path between the inlet and the gas sensor; a humidifier () disposed between the gas inlet and the gas sensor in the first gas flow path of the gas sensor apparatus; and a dehumidifier () disposed between the humidifier and the first gas sensor in the first gas flow path. The gas sensor apparatus may have more than one gas flow path. The gas sensor apparatus may contain more than one sensor. The gas sensor apparatus may contain one or more filters for filtering a target gas or a non-target gas. The gas sensor apparatus may be used in detection of ethylene and/or 1-methylcyclopropene.

Gas sensor

A gas sensor system for measuring a plurality of gases in an environment. The gas sensors system comprises multiple gas sensors where each of the gas sensors includes a pair of electrodes separated by a semiconducting material. The gas pairs of electrodes of the gas sensors are separated by different distances in each of the gas sensors. Resistivity of the semiconducting material of the gas sensors changes in the presence of a first gas and a contact resistivity between the electrodes and the semiconducting material of gas sensors changes in the presence of a second gas. From measurements of total resistivity of each of the gas sensors the presence and/or the concentration of both the first and the second gas sensors can be determined.

Semiconductor gas sensor and method for sensing two or more gases using contact resistance and sheet resistance

An apparatus for determining a presence, a concentration or a change in concentration of a target material in an environment is disclosed. The apparatus comprises first and second sensors configured to respond to the target material. The apparatus further comprises a fluid inlet in fluid communication with the environment, and a valve assembly having a first and second configuration. In the first configuration, the fluid inlet is in fluid communication with only the first sensor. In the second configuration, the fluid inlet is in fluid communication with the first sensor and the second sensor.

Sensor apparatus

A method of sensing a target gas in an environment in which a response of a semiconducting gas sensor device upon exposure to the environment is measured. The semiconducting gas sensor device includes first and second electrodes in electrical contact with a doped organic semiconductor layer and is, e.g., an organic thin film transistor or organic chemiresistor. The measured response may be indicative of a cumulative amount of a target gas that the semiconducting gas sensor device has been exposed to. A gas sensor module containing the semiconducting gas sensor device may be connectable to a reader configured to read the semiconducting gas sensor device after exposure to the environment. The connection may be wired or wireless. The target gas may be 1-methylcyclopropene.

Semiconductor gas sensor and gas sensing method

A fluorescent infrared emitting composition comprising a mixture of a first material and a second material wherein the first material is a fluorescent infrared material and the second material is a fluorescent material having a higher photoluminescent quantum yield (PLQY) and shorter peak wavelength than the infrared emitting material. The composition may be used as the light-emitting layer of an organic light-emitting device.

Fluorescent infrared emitting composition

Provided is a solution comprising a polymer and an organic semiconductor compound, wherein the semiconductor compound is a thiophene derivative, and wherein the solvent is a mixture comprising a) at least one of 4-methyl anisole, indane and an alkylbenzene with a linear or branched alkyl group containing from 4 to 7 carbon atoms; and b) at least one of tetrahydronaphthalin and 1,2,4-trimethylbenzene.

Growing community of inventors

Cambridgeshire, United Kingdom

Daniel Tobjork