Provided is a wavelength conversion member that is less decreased in luminescence intensity with time by irradiation with light of an LED or LD and a light emitting device using the wavelength conversion member. A wavelength conversion member is formed of an inorganic phosphor dispersed in a glass matrix, wherein the glass matrix contains, in % by mole, 30 to 85% SiO.sub.2, 0 to 20% B.sub.2O.sub.3, 0 to 25% Al.sub.2O.sub.3, 0 to 3% Li.sub.2O, 0 to 3% Na.sub.2O, 0 to 3% K.sub.2O, 0 to 3% Li.sub.2O+Na.sub.2O+K.sub.2O, 0 to 35% MgO, 0 to 35% CaO, 0 to 35% SrO, 0 to 35% BaO, 0.1 to 45% MgO+CaO+SrO+BaO, and 0 to 4% ZnO, and the inorganic phosphor is at least one selected from the group consisting of an oxide phosphor, a nitride phosphor, an oxynitride phosphor, a chloride phosphor, an oxychloride phosphor, a halide phosphor, an aluminate phosphor, and a halophosphoric acid chloride phosphor.

Provided is a semiconductor nanoparticle complex in which a ligand is coordinated to a surface of a semiconductor nanoparticle. The semiconductor nanoparticle is a core-shell type semiconductor nanoparticle including a core containing In and P and one or more layers of shells. The semiconductor nanoparticle further includes halogen and the molar ratio of halogen to In is 0.80 to 15.00 in terms of atoms. The ligand includes one or more kinds of mercapto fatty acid esters represented by the following general formula: HSR.sub.1COOR.sub.2. The mercapto fatty acid ester has an SP value of 9.20 or more. The mercapto fatty acid ester has a molecular weight of 700 or less, and the average SP value of the entire ligand is 9.10 to 11.00. The present invention provides a semiconductor nanoparticle complex dispersible at a high mass fraction in a polar dispersion medium while keeping high fluorescence quantum yield.

Provided is a semiconductor nanoparticle complex in which a ligand is coordinated to a surface of a semiconductor nanoparticle. The semiconductor nanoparticle is a core-shell type semiconductor nanoparticle including a core containing In and P and one or more layers of shells, wherein at least one of the shells is formed of ZnSe. The ligand includes one or more kinds of mercapto fatty acid esters represented by the following general formula (1): HSR.sub.1COOR.sub.2 (1). The mercapto fatty acid ester has an SP value of 9.20 or more. The mercapto fatty acid ester has a molecular weight of 700 or less, and the average SP value of the entire ligand is 9.10 to 11.00. The present invention provides a semiconductor nanoparticle complex dispersible at a high mass fraction in a polar dispersion medium while keeping high fluorescence quantum yield (QY) of semiconductor nanoparticles.

Materials comprising an A/M/X compound are provided. An A/M/X compound is a compound comprising one or more A moieties, one or more M atoms and one or more X atoms, where the A moieties are selected from organic cations and elements from Group 1 of the periodic table, the M atoms are selected from elements from Group 14 of the periodic table, and the X atoms are selected from elements from Group 17 of the periodic table. The materials include two-phase materials.

A wavelength-converting film and a light emitting device and a display device using the same are disclosed. The wavelength converting film comprises a fluoride phosphor powder with a Mn.sup.4+ as an activator, wherein the fluoride phosphor powder with the Mn.sup.4+ as the activator comprises a sheet-like crystal and has a chemical formula of A.sub.2[MF.sub.6]:Mn.sup.4+, wherein A is Li, Na, K, Rb, Cs, NH.sub.4, or a combination thereof, and M is Ge, Si, Sn, Ti, Zr, or a combination thereof.

A nanocrystal particle including at least one semiconductor material and at least one halogen element, the nanocrystal particle including: a core comprising a first semiconductor nanocrystal; and a shell surrounding the core and comprising a crystalline or amorphous material, wherein the halogen element is present as being doped therein or as a metal halide

A nanocrystal particle including at least one semiconductor material and at least one halogen element, the nanocrystal particle including: a core comprising a first semiconductor nanocrystal; and a shell surrounding the core and comprising a crystalline or amorphous material, wherein the halogen element is present as being doped therein or as a metal halide

An indium-containing quantum dot including a compound represented by Chemical Formula 1:

In.sub.1-xM.sub.xA Chemical Formula 1 wherein, in Chemical Formula 1, M is aluminum, gallium, yttrium, or scandium, A is nitrogen, phosphorous, arsenic, antimony, bismuth, or a combination thereof, and X is greater than or equal to 0 and less than 1, wherein the indium-containing quantum dot includes fluorine and oxygen to bonded to a surface of the indium-containing quantum dot, wherein an amount of the fluorine is greater than or equal to about 10 atomic percent based on a total number of indium atoms in the indium-containing quantum dot as determined by Rutherford backscattering analysis, and wherein an amount of the oxygen is about 5 atomic percent to about 50 atomic percent based on the total number of indium atoms included in the quantum dot as determined by Rutherford backscattering analysis.

An indium-containing quantum dot including a compound represented by Chemical Formula 1:

In.sub.1-xM.sub.xA Chemical Formula 1 wherein, in Chemical Formula 1, M is aluminum, gallium, yttrium, or scandium, A is nitrogen, phosphorous, arsenic, antimony, bismuth, or a combination thereof, and X is greater than or equal to 0 and less than 1, wherein the indium-containing quantum dot includes fluorine and oxygen to bonded to a surface of the indium-containing quantum dot, wherein an amount of the fluorine is greater than or equal to about 10 atomic percent based on a total number of indium atoms in the indium-containing quantum dot as determined by Rutherford backscattering analysis, and wherein an amount of the oxygen is about 5 atomic percent to about 50 atomic percent based on the total number of indium atoms included in the quantum dot as determined by Rutherford backscattering analysis.

A nanocrystal particle including at least one semiconductor material and at least one halogen element, the nanocrystal particle including: a core comprising a first semiconductor nanocrystal; and a shell surrounding the core and comprising a crystalline or amorphous material, wherein the halogen element is present as being doped therein or as a metal halide.