Materials and devices comprising at least one UV emitting device or material for emitting energy having a wavelength ranging from 100-400 nm, and at least one material that exhibits sterilizing properties, the material comprising a sterilizing metal compound, oxide, polymer or combinations thereof. A method of sterilizing a surface using the disclosed materials and devices are also disclosed.

A value document has a security marking in the form of two luminescent substances whose the emission spectra partially overlap in a primary emission range. The emission spectra have a degree of overlap of less than 80% and more than 5%, wherein the luminescent substances have different individual decay times in the primary emission range. The individual decay times of the luminescent substances differ from each other by more than 50% with reference to the shortest individual decay time.

A touchscreen cover comprising a top side facing the user of a touchscreen, a bottom side facing the touchscreen and at least one UV emitting device or material for emitting energy having a wavelength ranging from 100-400 nm, that is in optical communication with the top side. A method of sterilizing a touchscreen by exposing a touchscreen cover to UV radiation for a time sufficient to deactivate or kill at least one microorganism found on the touchscreen. A method of coating a cover for touchscreen with a sterilizing composition is also disclosed.

The present invention generally relates to a system for treating a fluid and specifically to a treatment system configured for improved bacterial reduction, wherein the system comprises a field emission based UV light source adapted to emit light within a ultraviolet C (UVC) spectrum with a wavelength range having an upper range limit being higher compared to light emitted from a mercury based UV light source.

Examples of a monolithic phosphor composite for measuring a parameter of an object are disclosed. The ceramic metal oxide phosphor composite is used in an optical device for measuring the parameter of the measuring object. The device comprises a fiber optic probe with a light guide, a light source operatively coupled to the fiber optic probe to provide excitation light into the light guide, a monolithic ceramic metal oxide phosphor composite functionally coupled to a tip of the fiber optic probe, a sensor operatively coupled to the fiber optic probe to detect the emitted light and a processing unit functionally coupled to the sensor to process the emitted light. The monolithic ceramic metal oxide phosphor composite can be embedded in a notch made into the object or can be adhered to a surface of the object with a binder. When the monolithic ceramic metal oxide phosphor composite is illuminated with the excitation light it emits light in a wavelength different from the excitation light and a change in emission intensity at a single wavelength or the change in intensity ratio of two or more wavelengths, a shift in emission wavelength peak or a decay time of the phosphor luminescence is a function of the measuring parameter.

A low-pressure discharge lamp having a discharge vessel and a coating structure. The coating structure is formed on an inner side of the discharge vessel. The coating structure has nanoscale phosphate particles and/or nanoscale functional oxide. Alternatively or in addition, the phosphate particles are free or at least approximately free of rare earth metals. The nanoscale phosphate particles range in size from 5 nm to 800 nm.

An ultraviolet light emitting phosphor for mercury-free lamps exhibiting ultraviolet by irradiation with vacuum ultraviolet rays or electron beam is provided.

The ultraviolet light emitting phosphor is a phosphor composed of a phosphate containing at least two metal elements selected from the group consisting of group 13 elements and lanthanoid series elements, and is excited to emit ultraviolet by irradiation with vacuum ultraviolet rays or electron beam.

A value document has a security marking in the form of two luminescent substances whose the emission spectra partially overlap in a primary emission range. The emission spectra have a degree of overlap of less than 80% and more than 5%, wherein the luminescent substances have different individual decay times in the primary emission range. The individual decay times of the luminescent substances differ from each other by more than 50% with reference to the shortest individual decay time.

A particulate lanthanide-doped material comprising an inorganic host phosphor and a lanthanide ion dopant. With the lanthanide-doped material being in an oxidized state, photoluminescence is suppressed. Photoluminescence of the material can be activated by the presence of a reducing substance that reduces the lanthanide-doped material in a redox interaction. The lanthanide-doped material can be used for biodetection (e.g. detecting the presence of microorganisms in a sample). This could have numerous applications, such as detecting the presence of contaminating microorganisms in a sample (e.g. in a food or cosmetic product).

A light fixture includes a first phosphor-converted light-emitting diode (PCLED) emitting light in a first PCLED wavelength range having first PCLED upper and lower bounds, a first direct light-emitting diode (DLED) emitting light in a first DLED wavelength range having first DLED upper and lower bounds, a second PCLED emitting light in a second PCLED wavelength range having second PCLED upper and lower bounds, and a second DLED emitting light in a second DLED wavelength range having second DLED upper and lower bounds. The first PCLED upper bound has a higher wavelength value than the first DLED upper bound. The first PCLED lower bound has a lower wavelength value than the first DLED lower bound. The second PCLED upper bound has a higher wavelength value than the second DLED upper bound. The second PCLED lower bound has a lower wavelength value than the second DLED lower bound.