| 摘要 |
An illumination system, comprising a radiation source and a monolithic ceramic luminescence converter comprising at least one phospbor capable of absorbing a part of light emitted by the radiation source and emitting light of wavelength different from that of the absorbed light; wherein said at least one phosphor is an alkaline earth metal sulfide of general formula AE<SUB>1-z</SUB>S<SUB>1-y</SUB>Se<SUB>y</SUB>:A<SUB>z</SUB> , wherein AE is at least one earth alkaline metal selected from the group of Mg, Ca, Sr and Ba, 0 = y < 1 and 0.0005 = z = 0.2, activated by an activator A selected from the group of Eu(II), Ce(III), Mn(II) and Pr(III). is highly efficient, especially if a blue light emitting diode is used as a radiation source, and provides excellent thermal and spectroscopic properties. The invention is also concerned with a monolithic ceramic luminescence converter comprising at least one phosphor capable of absorbing a part of light emitte by the radiation source and emitting light of wavelength different from that of the absorbed light; wherein said at least one phosphor is an alkaline earth metal sulfide of general formula AE<SUB>1-z</SUB>S<SUB>1-y</SUB>Se<SUB>y</SUB>:A<SUB>z </SUB>, wherein AE is as least one earth alkaline metal selected from the group of Mg, Ca, Sr and Ba, 0 = y < 1 and 0.0005 = z = 0.2, activate by an activator A selected from the group of Eu(II), Ce(III), Mn(II) and Pr(III). |
