A perovskite-based photoelectric functional material having a general formula M.sub.zA.sub.yBX.sub.z+y+2. The matrix of the photoelectric functional material is a perovskite material ABX.sub.3, M is an organic amphipathic molecule used as a modification component of the matrix, 0<z?0.5, 0<y?1, and y+z?1.

A light-absorbing material includes a compound, wherein the compound has a perovskite crystal structure represented by the formula AMX.sub.3 where a Cs.sup.+ ion is located at an A-site, a Ge.sup.2+ ion is located at an M-site, and I.sup.? ions are located at X-sites, and at least a part of the compound has an orthorhombic perovskite crystal structure. An X-ray diffraction pattern of the compound measured using Cu K? radiation may have a first peak at a diffraction angle (2?) of 25.4? or more and 25.8? or less and a second peak at a diffraction angle (2?) of 24.9? or more and 25.3? or less, and an intensity of the first peak may be 30% or more of an intensity of the second peak.

A main object of the present invention is to provide a sulfide solid electrolyte material having favorable ion conductivity and low reduction potential. The present invention solves the above-mentioned problem by providing a sulfide solid electrolyte material including an M.sub.1 element (such as a Li element), an M.sub.2 element (such as a Ge element, a Si element and a P element) and a S element, wherein the material has a peak at a position of 2=29.580.50 in X-ray diffraction measurement using a CuK line; and when a diffraction intensity at the peak of 2=29.580.50 is regarded as I.sub.A and a diffraction intensity at a peak of 2=27.330.50 is regarded as I.sub.B, a value of I.sub.B/I.sub.A is less than 0.50, and M.sub.2 contains at least P and Si.

The present invention relates to a method for controlling the density of an amorphous sulfide and, more specifically, to a method for producing an amorphous sulfide having high ionic conductivity of lithium ions by controlling the interplanar distance between a metal atom and a chalcogen atom through the adjustment of the reaction temperature and rate, in carrying out a sulfidation reaction by supplying a sulfur source in a gas phase onto the surface of a metal or an alloy.

The present invention relates to a method for controlling the density of an amorphous sulfide and, more specifically, to a method for producing an amorphous sulfide having high ionic conductivity of lithium ions by controlling the interplanar distance between a metal atom and a chalcogen atom through the adjustment of the reaction temperature and rate, in carrying out a sulfidation reaction by supplying a sulfur source in a gas phase onto the surface of a metal or an alloy.

A process for synthesizing a Mn.sup.4+ doped phosphor of formula I by electrolysis is presented. The process includes electrolyzing a reaction solution comprising a source of manganese, a source of M and a source of A. One aspect relates to a phosphor composition produced by the process. A lighting apparatus including the phosphor composition is also provided. A.sub.x[MF.sub.y]:Mn.sup.4+ (I) where, A is Li, Na, K, Rb, Cs, or a combination thereof; M is Si, Ge, Sn, Ti, Zr, Al, Ga, In, Sc, Hf, Y, La, Nb, Ta, Bi, Gd, or a combination thereof; x is the absolute value of the charge of the [MF.sub.y] ion; and y is 5, 6 or 7.

The present invention discloses a polymer-metal compound composite ink, a preparation method and application thereof. The composite ink comprises: at least one polymer; at least one metal compound material, the metal compound material being selected from polyoxometalate compounds and nanocrystalline metal oxides; at least one solvent which is used for forming a disperse system in the form of a uniform fluid together with the remaining components in the composite ink. The present invention also discloses a method for preparing the composite ink. The composite ink of the present invention is easily available in raw material, easy to prepare and low in cost, and can be manufactured into a composite thin film by spin-coating, printing or in other ways. The composite thin film, as an electrode modification layer, can be applied to photoelectric devices such as solar cells or light-emitting diodes, so as to improve the contact performance between an electrode and an organic active layer and thus enhance the performance and yield of photoelectric devices.

An oxide fluorescent material has a composition represented by the following formula (1):

(Mg.sub.1-pM.sup.1.sub.p).sub.q(Li.sub.1-rM.sup.2.sub.r).sub.s(In.sub.1-tM.sup.3.sub.t).sub.u(Ge.sub.1-vM.sup.4.sub.v).sub.wOx:Cr.sub.y,M.sup.5.sub.z(1) wherein M.sup.1 represents at least one element selected from the group consisting of Ca, Sr, Ba, and Zn; M.sup.2 represents at least one element selected from the group consisting of Na, K, Rb, and Cs; M.sup.3 represents at least one element selected from the group consisting of Al, Ga, and Sc; M.sup.4 represents at least one element selected from the group consisting of Si, Ti, Zr, Sn, and Hf; M.sup.5 represents at least one element selected from the group consisting of Ni, Ce, Eu, Fe, Mn, Nd, Tm, Ho, Er, and Yb; and p, q, r, s, t, u, v, w, x, y, and z satisfy 0p1.0, 0.1q0.9, 0r1.0, 0.05s0.45, 0t0.5, 0.05u0.45, 0v1.0, 0.8w1.3, 2.6x3.6, 0.002y0.5, 0z0.3, and 0.9q+s+u1.2.

The present invention can provide a method for preparing a sulfide-based solid electrolyte in a short time using a solvothermal synthesis method. In addition, the present invention may provide a sulfide-based solid electrolyte prepared by the method. In addition, the present invention may provide an electrode for an all-solid-state battery including the sulfide-based solid electrolyte.

Semiconductor nanoparticles that include a compound semiconductor mainly containing a Ag component, a Ge component, and a S component, wherein a content ratio of the Ag component to the Ge component is 1.0 or more and less than 7.5, in terms of molar ratio, and an average particle size of the semiconductor nanoparticles is 9 nm or less