| abstract |
A wavelength converting element ( 104 ), typically for a LED ( 101 ), is provided, comprising luminescent particles ( 105 ) dispersed in a matrix ( 106 ) comprising crosslinked polysiloxane. Crosslinked polysiloxanes are temperature stable, typically up to temperatures above 300° C., meaning that they are stable under normal operating conditions of light emitting diodes. Further, crosslinked polysiloxanes are stable towards exposure to light, meaning that they will not degrade/discolor as a consequence of high intensity light exposure. The polymeric wavelength converter can easily be shaped in different forms. This may lead to better outcoupling of the light from a LED-converter system. |