Luminescent light diffuser for diffuse lighting applications

Autor: Amy Witzmann, Calum K. Gordon, Jesse Howarth, Sophie Unsworth, Aurélien Rossi, Jake Hardy, Michael B. Price, Nathaniel J. L. K. Davis
Rok vydání: 2022
Předmět:
Zdroj: Luminescence. 38:47-55
ISSN: 1522-7243
1522-7235
Popis: The lighting industry currently accounts for a significant proportion of all energy demand. Luminescent white lighting is often impure, inefficient, expensive, and detrimentally emits as a point source, meaning the light is emitted from a focused point. A luminescent light diffuser offers the potential to create a spatially broad lighting fixture. We developed a luminescent light diffuser consisting of three commercially available luminescent dye species (rhodamine 6G, fluorescein, 7-diethylamino-4-methylcoumarin) dispersed within a polymer matrix (polyvinyl alcohol), or commercial paint, and coated on a planar waveguide. A Light-emitting diode (LED) (385 nm) is directed into the waveguide which excites the luminescent species, coating the panel, creating a device that emits spatially broad pure white light. As the emission depends on escape cone emission from the waveguide, the device's emission was found to depend highly on the coating film quality and components. We present two systems: a small 40 mm × 40 mm prototype, made using standard water-soluble polymer (polyvinyl alcohol), to study the underlying operational principles, and a 100 mm
Databáze: OpenAIRE
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