ILLUMINATION SYSTEM COMPRISING HETERO- POLYOXOMETALATE

摘要

An illumination system comprising a radiation source and a luminescent material comprising at least one first phosphor capable of absorbing a part of the radiation emitted by the radiation source and emitting radiation of a wavelength different from that of the absorbed radiation, wherein said at least one phosphor is an europium(III)-activated hetero-polyoxometallate of general formula A<SUB>a</SUB>RE<SUB>b-z</SUB>M<SUB>m</SUB>O<SUB>3m+3/2b+a-</SUB>