摘要:
A system to form a thin-film phosphor layer on a substrate, the system comprising a deposition subsystem defining an enclosure to accommodate the substrate; a phosphor powder delivery subsystem configured to deliver, using a carrier gas, a phosphor powder from a source of the phosphor powder to the deposition subsystem; a polymer precursor delivery subsystem configured to deliver polymer precursors in a vapor phase to the deposition subsystem; and a control subsystem connected to the deposition subsystem, the phosphor powder delivery subsystem, and the polymer precursor delivery subsystem, wherein the control subsystem is configured to control the phosphor powder delivery subsystem to deliver the phosphor powder to the deposition subsystem for a first time interval to form a phosphor powder layer adjacent to the substrate, and the control subsystem is configured to control the polymer precursor delivery subsystem to deliver the polymer precursors to the deposition subsystem for a second time interval to form a polymer layer adjacent to the phosphor powder layer.
摘要:
A system to form a thin-film phosphor layer on a substrate, the system comprising a deposition subsystem defining an enclosure to accommodate the substrate; a phosphor powder delivery subsystem configured to deliver, using a carrier gas, a phosphor powder from a source of the phosphor powder to the deposition subsystem; a polymer precursor delivery subsystem configured to deliver polymer precursors in a vapor phase to the deposition subsystem; and a control subsystem connected to the deposition subsystem, the phosphor powder delivery subsystem, and the polymer precursor delivery subsystem, wherein the control subsystem is configured to control the phosphor powder delivery subsystem to deliver the phosphor powder to the deposition subsystem for a first time interval to form a phosphor powder layer adjacent to the substrate, and the control subsystem is configured to control the polymer precursor delivery subsystem to deliver the polymer precursors to the deposition subsystem for a second time interval to form a polymer layer adjacent to the phosphor powder layer.
摘要:
A stack of layers 100, a lamp, a luminaire and a method of manufacturing a stack of layers is disclosed. The stack of layers 100 comprises a first outer layer 102, a second outer layer 106 and a luminescent layer 104. The first outer layer 102 and the second outer layer 106 are of a light transmitting polymeric material and have an oxygen transmission rate lower than 30 cm3/(m2-day) measured under standard temperature and pressure (STP). The luminescent layer 104 is sandwiched between the first outer layer 102 and the second outer layer 106 and comprises a light transmitting matrix polymer and a luminescent material 108 being configured to absorb light according to an absorption spectrum and convert a portion of the absorbed light towards light of a light emission spectrum.
摘要:
A wavelength converting structure is provided. The wavelength converting structure comprises the following: a substrate, and a wavelength converting coating which is deposited on the substrate and comprises: (a) a phosphor powder which can be excited by UV c ; and (b) an anti-UV C adhesive,
wherein the thickness of the wavelength converting coating is 2 to 10 times the average particle size of the phosphor powder and the amount of the phosphor powder in the wavelength converting coating conforms to at least one of the following requirements: (i) the phosphor powder should be about 30 % to 85% by volume of the wavelength converting coating based on the total volume of the phosphor powder and the adhesive; and (ii) the weight ratio of the phosphor powder to the adhesive should range from 1:1 to 20:1.
The wavelength converting coating can effectively convert UV C to visible light to provide a visible light source with a high surface area.
摘要:
A wavelength converting structure is provided. The wavelength converting structure comprises the following: a substrate, and a wavelength converting coating which is deposited on the substrate and comprises: (a) a phosphor powder which can be excited by UV c ; and (b) an anti-UV C adhesive,
wherein the thickness of the wavelength converting coating is 2 to 10 times the average particle size of the phosphor powder and the amount of the phosphor powder in the wavelength converting coating conforms to at least one of the following requirements: (i) the phosphor powder should be about 30 % to 85% by volume of the wavelength converting coating based on the total volume of the phosphor powder and the adhesive; and (ii) the weight ratio of the phosphor powder to the adhesive should range from 1:1 to 20:1.
The wavelength converting coating can effectively convert UV C to visible light to provide a visible light source with a high surface area.
摘要:
A system to form a thin-film phosphor layer on a substrate, the system comprising a deposition subsystem defining an enclosure to accommodate the substrate; a phosphor powder delivery subsystem configured to deliver, using a carrier gas, a phosphor powder from a source of the phosphor powder to the deposition subsystem; a polymer precursor delivery subsystem configured to deliver polymer precursors in a vapor phase to the deposition subsystem; and a control subsystem connected to the deposition subsystem, the phosphor powder delivery subsystem, and the polymer precursor delivery subsystem, wherein the control subsystem is configured to control the phosphor powder delivery subsystem to deliver the phosphor powder to the deposition subsystem for a first time interval to form a phosphor powder layer adjacent to the substrate, and the control subsystem is configured to control the polymer precursor delivery subsystem to deliver the polymer precursors to the deposition subsystem for a second time interval to form a polymer layer adjacent to the phosphor powder layer.
摘要:
There are provided a long persistent phosphor capable of keeping high persistent intensity and white persistence of especially satisfactory color purity after the phosphor is excited by ultraviolet irradiation and then the excited light is cut off, and a fluorescent lamp, a display item of long persistence and a formed product of long persistence in which the phosphor is used. A long phosphorescence persistent phosphor which comprises a mixture or mutual deposit of the first phosphor emitting long persistence in the first wave range by ultraviolet absorption, which is one or more than two of the following phosphors (i) and (ii), and a second phosphor which is excited by at least a part of emission of the first phosphor. Magnesium-strontium silicate phosphor (i) prepared by co-activating a complex-oxide containing Sr, Mg and Si as a matrix metal component with Eu and Dy. Strontium-aluminum silicate phosphor (ii) prepared by co-activating a complex-oxide containing Sr, Al and Si as a matrix metal component with europium Eu and Dy. The long persistent phosphor is used as a fluorescent screen to prepare a fluorescent lamp, applied to a displaying part to prepare a display item of long persistence or added to plastics and other materials and formed into a desired shape to prepare a formed product.