Patent ID: 9109163
Filing Date: 2015-08-18
Classification: B82Y,C09K,H01L,Y10S

Abstract:
1. An optical conversion layer for use in a lighting device in which a light source emits light of a first wavelength, the conversion layer comprising at least one type of semiconductor nanoparticles having a central emission wavelength (CWL) in the range 520-580 nm, the conversion layer characterized by having an optical density (OD) between 0.05 and 2 at 405 nm and an absorption ratio (AR) of absorbance at 405 nm to a maximum value of absorbance in the range 520-600 nm greater than 3.5:1, wherein the conversion layer may be used to convert at least part of the light of the first wavelength into light of a second wavelength longer than the first wavelength.