Provided herein are novel phosphors useful in the manufacture of white light emitting diodes. The phosphors provided by the invention are described by the formulae: description="In-line Formulae" end="lead"MA2(SxSey)4:Bdescription="In-line Formulae" end="tail" and/or description="In-line Formulae"...http://www.google.de/patents/US20050023963?utm_source=gb-gplus-sharePatent US20050023963 - Light emitting device having thio-selenide fluorescent phosphor