Abstract: Disclosed herein is a method of making a light emitting device comprising an LED and a molded silicon-containing encapsulant. The method includes contacting the LED with a photopolymerizable composition containing a silicon-containing resin having silicon-bonded hydrogen and aliphatic unsaturation and two metal-containing catalysts. One catalyst may be activated by actinic radiation, and the second by heat but not the actinic radiation. Polymerization of the photopolymerizable composition to form the encapsulant may be carried out by selectively activating the different catalysts. At some point before polymerization is complete, a mold is used to impart a predetermined shape to the encapsulant.

Abstract: An edge-lit backlight having a light recycling cavity with concave transflector is disclosed. The edge-lit backlight has an output area and includes a back reflector facing the output area of the backlight. The backlight further includes a transflector that partially transmits and partially reflects incident light, the transflector being shaped to form a concave structure facing the back reflector to provide one or more recycling cavities therebetween, where the one or more recycling cavities substantially fill the output area of the backlight. The backlight further includes at least one light source positioned adjacent a first edge of the backlight. The at least one light source is operable to inject light into the one or more recycling cavities through an input surface of the one or more recycling cavities, where the input surface is substantially orthogonal to the output area, and where the at least one concave structure converges with the back reflector in a direction distal from the input surface.

Abstract: Disclosed herein is a light emitting device including an LED die and a photopolymerizable composition comprising a silicon-containing resin comprising silicon-bonded hydrogen and aliphatic unsaturation, and from about 0.5 to about 30 parts per million of a platinum catalyst. The photopolymerizable composition may be free of catalyst inhibitor. Also disclosed herein are methods of making the light emitting device.

Abstract: A method of making a light emitting device is disclosed herein. The method includes providing an LED die and dispensing a photopolymerizable composition to form a photopolymerizable dome lens, wherein the photopolymerizable composition is optically coupled to the LED die. The photopolymerizable dome lens may be formed by the photopolymerizable composition using a single drop or a plurality of drops. In one embodiment, the photopolymerizable composition comprises a metal-containing catalyst and a silicon-containing resin comprising silicon-bonded hydrogen and aliphatic unsaturation. The photopolymerizable dome is polymerized to form a polymerized dome lens. Light emitting devices prepared according to the methods are also described.

Abstract: A three-dimensional shaped structure is prepared from a multi-photon reactive composition including: (a) at least one reactive species; (b) a multi-photon photoinitiator system; and (c) a plurality of substantially inorganic particles, wherein the particles have an average particle size of less than about 10 microns in diameter.

Abstract: A method of making a light emitting device is disclosed. The method includes providing a light emitting diode and forming an encapsulant in contact with the light emitting diode; wherein forming the encapsulant includes contacting the light emitting diode with a photopolymerizable composition comprising a silicon-containing resin, a metal-containing catalyst, and surface treated particles, the silicon-containing resin comprises silicon-bonded hydrogen and aliphatic unsaturation, the surface treated particles comprising nonabsorbing metal oxide particles, semiconductor particles, or combinations thereof, and applying actinic radiation having a wavelength of 700 nm or less to initiate hydrosilylation within the silicon-containing resin.

Abstract: Disclosed herein are LED devices having lenses and methods of making the devices. The LED devices are made using an optical layer comprising a plurality of lens features. The optical layer is disposed relative to the LED die such that at least one LED die is optically coupled to at least one lens feature. A lens can then be made from the lens feature and excess optical layer removed to provide the device.

Abstract: Molded optical articles and methods of making them are disclosed herein. Optical articles comprise a photopolymerizable composition disposed on a major surface of a substrate. The photopolymerizable composition comprises: a silicon-containing resin comprising silicon-bonded hydrogen and aliphatic unsaturation, and a platinum catalyst providing from about 0.5 to about 30 parts per million of platinum. The major surface imparts a positive or negative lens to the photopolymerizable composition. Optical articles also include those that have been photopolymerized using actinic radiation having a wavelength of 700 nm or less.

Abstract: A method of making a light emitting device is disclosed. The method includes the steps of providing a light emitting diode and forming an encapsulant in contact with the light emitting diode; wherein forming the encapsulant includes contacting the light emitting diode with a photopolymerizable composition consisting of a silicon-containing resin and a metal-containing catalyst, wherein the silicon-containing resin consists of silicon-bonded hydrogen and aliphatic unsaturation, and applying actinic radiation having a wavelength of 700 nm or less to initiate hydrosilylation within the silicon-containing resin.

Abstract: A method of making an LED light emitting device is disclosed. The method includes forming a multilayer encapsulant in contact with an LED by contacting the LED with a first encapsulant that is a silicone gel, silicone gum, silicone fluid, organosiloxane, polysiloxane, polyimide, polyphosphazene, sol-gel composition, or a first photopolymerizable composition, and then contacting the first encapsulant with a second photopolymerizable composition. Each photopolymerizable composition includes a silicon-containing resin and a metal-containing catalyst, the silicon-containing resin comprising silicon-bonded hydrogen and aliphatic unsaturation. Actinic radiation having a wavelength of 700 nm or less is applied to initiate hydrosilylation within the silicon-containing resins.

Abstract: A process comprises (a) providing a substantially inorganic photoreactive composition comprising (1) at least one cationically reactive species, (2) a multi-photon photoinitiator system, and 10 (3) a plurality of precondensed, inorganic nanoparticles; (b) exposing, using a multibeam interference technique involving at least three beams, at least a portion of the photoreactive composition to radiation of appropriate wavelength, spatial distribution, and intensity to produce a two-dimensional or three-dimensional periodic pattern of reacted and non-reacted portions of the photoreactive composition; (c) exposing at least a portion of the non-reacted portion of the photoreactive composition to radiation of appropriate wavelength and intensity to cause multi-photon absorption and photoreaction to form additional reacted portion; (d) removing the non-reacted portion or the reacted portion of the photoreactive composition to form interstitial void space; and (e) at least partially filling the interstitial void space

Abstract: A method of making a light emitting device is disclosed. The method includes providing a light emitting diode; providing an optical element; attaching the optical element to the light emitting diode with a photopolymerizable composition, the photopolymerizable composition comprising a silicon-containing resin and a metal-containing catalyst, wherein the silicon-containing resin comprises silicon-bonded hydrogen and aliphatic unsaturation; and applying actinic radiation having a wavelength of 700 nm or less to initiate hydrosilylation within the silicon-containing resin.

Abstract: A cured coating for a siliceous material, preferably an optical fiber, comprises a thermally cured polyorganosilsesquioxane having an oxide powder dispersed therein. The oxide powder has a refractive index from about 1.2 to about 2.7 and includes particles having a particle size less than about 100 nanometers. The cured coating has adhesion to the siliceous material and is transparent to ultraviolet radiation.

Abstract: A multi-photon reactive composition including: (a) at least one reactive species; and (b) multi-photon photoinitiator system; and (c) a plurality of substantially inorganic particles, wherein the particles have an average particle size of less than about 10 microns in diameter.

Abstract: Disclosed herein is a coated optical fiber comprising: a siliceous optical fiber including a core inside a cladding; and a cured coating comprising: a thermally cured polyorganosilsesquioxane; and an oxide powder dispersed in said cured polyorganosilsesquioxane, wherein said oxide powder has a refractive index from about 1.2 to about 2.7 and includes a plurality of particles having a particle size less than about 100 nanometers, said cured coating having adhesion to said siliceous optical fiber and further having transparency to ultraviolet radiation. Also disclosed herein is a fiber optic device comprising the optical fiber.

Abstract: A method for making an inorganic structure including: (a) applying a photoreactive composition to a substrate, wherein the composition includes: a reactive species, a photoinitiator system, and a plurality of substantially inorganic colloidal particles, wherein the particles have an average particle size of less than about 300 nm; (b) photopatterning the composition to define a structure; and (c) subjecting the structure to elevated temperature for a time sufficient to pyrolyze the reactive species and to at least partially fuse the particles.

Abstract: A method of making a light emitting device is disclosed. The method includes providing a light emitting diode and forming an encapsulant in contact with the light emitting diode; wherein forming the encapsulant includes contacting the light emitting diode with a photopolymerizable composition consisting of a silicon-containing resin and a metal-containing catalyst, wherein the silicon-containing resin consists of silicon-bonded hydrogen and aliphatic unsaturation, and applying actinic radiation having a wavelength of 700 nm or less to initiate hydrosilylation within the silicon-containing resin.

Abstract: A cured coating for a siliceous material, preferably an optical fiber, comprises a thermally cured polyorganosilsesquioxane having an oxide powder dispersed therein. The oxide powder has a refractive index from about 1.2 to about 2.7 and includes particles having a particle size less than about 100 nanometers. The cured coating has adhesion to the siliceous material and is transparent to ultraviolet radiation.

Abstract: A method for making an inorganic structure including:

Abstract: A multi-photon reactive composition including: (a) at least one reactive species; and (b) multi-photon photoinitiator system; and (c) a plurality of substantially inorganic particles, wherein the particles have an average particle size of less than about 10 microns in diameter.