摘要:
Synthesizing a color stable Mn4+ doped phosphor by contacting a gaseous fluorine-containing oxidizing agent with a precursor of: AaBbCcDdXx:Mn4+; AaiBbiCciDdXxYd:Mn4+; A13G2−m−nMnmMgnLi3F12Op; or AZF4:Mn4+. Where A is Li, Na, K, Rb, Cs, or a combination; B is Be, Mg, Ca, Sr, Ba, or a combination; C is Sc, Y, B, Al, Ga, In, Tl, or a combination; D is Ti, Zr, Hf, Rf, Si, Ge, Sn, Pb, or a combination; X is F or a combination of F and one of Br, Cl, and I; Y is O, or a combination of O and one of S and Se; A1 is Na or K, or a combination; G is Al, B, Sc, Fe, Cr, Ti, In, or a combination; Z is La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Sc, Y, In, or a combination.
摘要:
A UV screening composition comprising novel particles which are capable of absorbing UV light so that electrons and positively charged holes are formed within the particles is disclosed. These particles comprise a host lattice incorporating a second component to provide luminescence trap sites and/or killer sites, said second component being niobium, vanadium, antimony, tantalum, strontium, calcium, magnesium, barium, molybdenum or silicon.
摘要:
A luminescent particle is described having the formula: M2[M1(POM)] wherein: M2 is a cation, M1 is an ion of a metal capable of providing a luminescent centre or a mixture of two or more thereof, and POM is a polyoxometallate, polythiometallate or polyoxothiometallate of at least one metal of group VA or VIA of the Periodic Table and, optionally, a hetero atom, X, the amounts of X, M1, M2 and POM being such as to provide overall neutrality.
摘要:
A phosphor comprising a host consisting essentially of lithium borosilicate having the general formula Li x Mg y B 2 Si 6 0 z F w , where x can be 2 or 6, y can be 6 or 4, z can be 19.75 or 20 and w can be 4 or 4.5, and at least one activator selected from the group consisting of vanadium, europium, manganese, cerium and terbium.
摘要:
A novel phosphor capable of exhibiting strong light emissions over a wide excitation wavelength range and a light-emitting device using such a phosphor are provided. Said phosphor is characterized by the fact that it contains a metal oxide containing at least one alkaline earth element selected from the group composed of Ca, Sr, and Ba, at least one element selected from the group composed of Be, Cu, Zn, Pb, Cd, Mg, and Sn, at least one element selected from the group composed of B, Al, Ga, and In, and at least one element selected from the group composed of P and V, in which at least one element selected from the group composed of Ce, Pr, Sm, Nd, Gd, Eu, Tb, Dy, Ho, Tm, Er, Yb, and Mn is contained as an added activator.
摘要:
A broadband source, including associated devices that may incorporate the broadband source, which makes use of at least one, preferably two or more broad fluorescence spectra in combination from one or more species of transition metal ions doped in one or more material bodies. The bodies are selected from crystalline, glass-ceramic, glass, or polymer-organic materials. The broadband source or devices can generate a very broad fluorescence spectrum. The combined spectrum preferably spans a wavelength range of about 500 nm to 600 nm to 700 nm, and having an intensity that does not deviate from an average intensity by more than about 10 dB, over a range or portion of the near infrared region.
摘要:
A UV screening composition comprising novel particles which are capable of absorbing UV light so that electrons and positively charged holes are formed within the particles is disclosed. These particles comprise a host lattice incorporating a second component to provide luminescence trap sites and/or killer sites, said second component being niobium, vanadium, antimony, tantalum, strontium, calcium, magnesium, barium, molybdenum or silicon.