A wavelength-converting film includes a sintered body formed of a mixture of a wavelength-converting material and a glass composition. The wavelength-converting material includes a quantum dot having a core-shell structure and a protective layer coating a surface of the quantum dot. A shell of the quantum dot contains at least one of Zn, S, and Se, the protective layer does not contain S and Se, and the glass composition includes a SnO.sub.2P.sub.2O.sub.5SiO.sub.2-based composition.

An article includes SiO.sub.2 from about 40 mol % to about 80 mol %, Al.sub.2O.sub.3 from about 1 mol % to about 20 mol %, B.sub.2O.sub.3 from about 3 mol % to about 50 mol %, WO.sub.3 plus MoO.sub.3 from about 1 mol % to about 18 mol % and at least one of: (i) Au from about 0.001 mol % to about 0.5 mol %, (ii) Ag from about 0.025 mol % to about 1.5 mol %, and (iii) Cu from about 0.03 mol % to about 1 mol %, and R.sub.2O from about 0 mol % to about 15 mol %. The R.sub.2O is one or more of Li.sub.2O, Na.sub.2O, K.sub.2O, Rb.sub.2O and Cs.sub.2O. R.sub.2O minus Al.sub.2O.sub.3 ranges from about 12 mol % to about 3.8 mol %.

A composition for solar cell electrodes including a conductive powder, a glass frit, and an organic vehicle. The glass frit contains tellurium (Te), sodium (Na), zinc (Zn), and at least one of lead (Pb) and bismuth (Bi). A molar ratio of the sum of lead and bismuth to zinc ranges from about 1 to about 20. A molar ratio of tellurium to sodium ranges from about 1 to about 15.

Provided is a wavelength conversion member that can exhibit an antireflection function for incident light and emitted light at various angles and can increase the luminous efficiency. A wavelength conversion member 10 includes: a phosphor layer 1 containing a glass matrix 3 and phosphor particles 4 dispersed in the glass matrix 3; and a low-refractive index layer 2 formed on a surface of the phosphor layer 1 and having a refractive index equal to or smaller than a refractive index of the phosphor particles 4, wherein the low-refractive index layer 2 has an uneven surface structure and a waviness profile formed by the uneven surface structure has a root-mean-square gradient Wq of 0.1 to 1.

Provided is a wavelength conversion member which is made of a phosphor powder dispersed in a glass matrix and has an excellent luminous efficiency. A wavelength conversion member is comprising: a phosphor powder dispersed in a glass matrix, wherein the glass matrix has a refractive index (nd) of 1.6 or more and a liquidus temperature of 1070? C. or below.

A method of manufacturing a polarizing glass sheet includes subjecting, while heating, a glass preform sheet containing metal halide particles to down-drawing, to thereby provide a glass member having stretched metal halide particles dispersed in an aligned manner in a glass matrix, and subjecting the glass member to reduction treatment to reduce the stretched metal halide particles, to thereby provide a polarizing glass sheet. A shape of the glass preform sheet during the down-drawing satisfies a relationship of the following expression:

L.sub.1/W.sub.11.0

where L.sub.1 represents a length between a portion in which a width of the glass preform sheet has changed to 0.8 times an original width and a portion in which the width of the glass preform sheet has changed to 0.2 times the original width W.sub.0, and W.sub.1 represents a length equivalent to 0.5 times the original width W.sub.0 of the glass preform sheet.

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 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, 4.3 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 5% 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.

A luminescent glass-ceramic material, its manufacturing method, and a light emitting device including the luminescent glass-ceramic material are provided. The luminescent glass-ceramic material includes a glass material and phosphors, wherein the glass material includes SiO.sub.2, Al.sub.2O.sub.3, Na.sub.2O, K.sub.2O, CaO, and B.sub.2O.sub.3.

A lamp is provided that includes a glass tube body composed of a glass composition that includes an optical diffusive agent to increase the light diffusivity of the glass tube body. The lamp can include a glass tube body having a perimeter defined by a sidewall of the glass tube body for enclosing a hollow interior. The glass tube body is composed of a sodium silicate glass including an optically diffusive agent that is alloyed with a silicate base glass composition. The optically diffusive agent can be selected from lithium borosilicate, titanium dioxide, antimony trioxide or combinations thereof. The lamp can further include at least one light emitting diode (LED) on a substrate that provides the light source. The at least one light emitting diode (LED) that is present on the substrate is positioned within the hollow interior of the glass tube body.