Rare earth phosphor
US5312560A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 18, 1993 |
| Grant date | May 17, 1994 |
| Priority date | — |
| Expiry date | Mar 18, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K11/7771
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Phosphors capable of emitting substantially white luminescent were represented by the following general formulae, (I), (II) and (III). EQU (Y.sub.1-X-Y-Z Lu.sub.X Tb.sub.Y Sm.sub.Z).sub.2 O.sub.2 S (I) PA1 0<X.ltoreq.5.times.10.sup.-2 1.times.10.sup.-3 .ltoreq.Y.ltoreq.t.times.10.sup.-3 0.ltoreq.Z.ltoreq.5.times.10.sup.-2 EQU (Y.sub.1-a-b-c Yb.sub.a Tb.sub.b Sm.sub.c).sub.2 O.sub.2 S (II) wherein: PA1 0<a.ltoreq.5.times.10.sup.-4 1.times.10.sup.-3 .ltoreq.b.ltoreq.5.times.10.sup.-3 PA1 0.ltoreq.c.ltoreq.5.times.10.sup.-2 EQU (Y.sub.1-d-e-f Ce.sub.d Tb.sub.e Sm.sub.f).sub.2 O.sub.2 S (III) PA1 wherein 0<d.ltoreq.1.times.10.sup.-4 .times.10.sup.-3 .ltoreq.e.ltoreq.5.times.10.sup.-3 PA1 0.ltoreq.f.ltoreq.5.times.10.sup.-2
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.