Abstract: A thin film of amorphous metal oxide includes zinc (Zn), silicon (Si) and oxygen (O), the atomic ratio of Zn/(Zn+Si) being 0.30 to 0.95.

Abstract: A method of manufacturing an electrically conductive mayenite compound, includes (a) preparing a body to be processed, the body to be processed including a mayenite compound or a precursor of a mayenite compound; and (b) performing a heat treatment on the body to be processed under a reducing atmosphere including an aluminum compound and carbon monoxide (CO) gas within a range of 1080° C. to 1450° C., the aluminum compound being a compound that emits aluminum oxide gas during the heat treatment on the body to be processed.

Abstract: A light emitting device including an organic electroluminescence element is provided. The light emitting device may be a display device or a lighting device. The organic electroluminescence element includes an anode, a light emitting layer, and a cathode that are arranged in this order. An electron injection layer is arranged between the light emitting layer and the cathode. The electron injection layer is made of an amorphous C12A7 electride.

Abstract: There is provided a sputtering target for forming an amorphous film, the sputtering target including an electrically conductive mayenite compound, wherein electron density of the electrically conductive mayenite compound is greater than or equal to 3×1020 cm?3, and wherein the electrically conductive mayenite compound includes one or more elements that are selected from a group including C, Fe, Na, and Zr.

Abstract: A method of manufacturing an electrically conductive mayenite compound, includes (a) preparing a body to be processed, the body to be processed including a mayenite compound or a precursor of a mayenite compound; and (b) performing a heat treatment on the body to be processed under a reducing atmosphere including an aluminum compound and carbon monoxide (CO) gas within a range of 1080° C. to 1450° C., the aluminum compound being a compound that emits aluminum oxide gas during the heat treatment on the body to be processed.

Abstract: A method of manufacturing an electrically conductive mayenite compound, includes preparing a body to be processed including a mayenite compound; and placing the body to be processed in the presence of carbon monoxide gas and aluminum vapor supplied from an aluminum source without being in contact with the aluminum source and retaining the body to be processed at a temperature range of 1080° C. to 1450° C. under a reducing atmosphere.

Abstract: A light emitting device including an organic electroluminescence element is provided. The light emitting device may be a display device or a lighting device. The organic electroluminescence element includes an anode, a light emitting layer, and a cathode that are arranged in this order. An electron injection layer is arranged between the light emitting layer and the cathode. The electron injection layer is made of an amorphous C12A7 electride.

Abstract: A production method of an electroconductive mayenite compound having an electron density greater than or equal to 5×1020 cm?3 includes preparing an object of processing containing a mayenite compound or a precursor of a mayenite compound, placing aluminum foil on at least part of a surface of the object of processing, and retaining the object of processing at temperatures falling within the range of 1080° C. to 1450° C. in a low oxygen partial pressure atmosphere.

Abstract: A C12A7 electride thin film fabrication method includes a step of forming an amorphous C12A7 electride thin film on a substrate by vapor deposition under an atmosphere with an oxygen partial pressure of less than 0.1 Pa using a target made of a crystalline C12A7 electride having an electron density within a range of 2.0×1018 cm?3 to 2.3×1021 cm?3.

Abstract: A method of manufacturing an electrical conductive mayenite compound, including, (1) a step of preparing a calcinated powder including calcium oxide and aluminum oxide at a ratio of 13:6 to 11:8 (based on molar ratio as converted to CaO:Al2O3), and (2) a step of placing a body to be processed including the calcinated powder prepared in the step (1) in the presence of carbon monoxide gas and aluminum vapor supplied from the aluminum source without contacting the aluminum source, and holding the body to be processed at a temperature range of 1220° C. to 1350° C. under reducing atmosphere.

Abstract: The present invention relates to a mayenite-type compound in which a part of Ca of a mayenite-type compound containing Ca, Al and oxygen is substituted by at least one kind of an atom M selected from the group consisting of Be, Mg and Sr, in which the mayenite-type compound has an atom number ratio represented by M/(Ca+M) of from 0.01 to 0.50, and at least a part of free oxygen ions in a mayenite-type crystal structure are substituted by anions of an atom having electron affinity smaller than that of an oxygen atom.

Abstract: An electrode for a hot cathode fluorescent lamp may include a main body that emits thermions, a conductive support that supports the main body, and a lead electrically connected to the conductive support. The main body includes no filament structure and may be made of a bulk material having a columnar shape or an ingot shape formed by a conductive mayenite compound.

Abstract: To provide a method for preparing a mayenite-containing oxide containing a mayenite type compound and having a hydride ion density of at least 1×1018/cm3 without need for expensive facilities, control of complicated reaction conditions or a long period of reaction time. A method for preparing a mayenite-containing oxide, which comprises a firing step of heating a starting material having a molar ratio of CaO:Al2O3 being from 9:10 to 14:5 based on the oxides at a temperature of from 900 to 1,300° C. to obtain a fired powder and a hydrogenation step of firing the fired powder at a temperature of at least 1,210° C. and lower than 1,350° C.

Abstract: The present invention relates to a fluorescent lamp including: a discharge space containing a discharge gas and being surrounded by a glass; a discharge electrode; a phosphor; and a mayenite type compound provided on at least a part of an inner surface contacting the discharge gas. According to the fluorescent lamp of the present invention, a fluorescent lamp that has good luminous efficiency of ultraviolet ray from a discharge gas, has good discharge characteristics such as discharge starting voltage and discharge sustaining voltage in a fluorescent lamp, is chemically stable, has excellent oxidation resistance, has excellent sputtering resistance, and can achieve electric power saving is provided.

Abstract: An electrode for a discharge lamp is provided with a mayenite compound in at least a part of the electrode that emits secondary electrons, and the mayenite compound is fired in a vacuum atmosphere with an oxygen partial pressure of 10?3 Pa or less, an inert gas atmosphere with an oxygen partial pressure of 10?3 Pa or less, or a reducing atmosphere with an oxygen partial pressure of 10?3 Pa or less.

Abstract: An electrode for a discharge lamp includes an electrode body configured to emit thermal electrons. The electrode body is formed by a sintered body of a conductive mayenite compound.

Abstract: An electrode for a fluorescent lamp includes a filament and an emitter provided on the filament. The emitter includes a mayenite compound.

Abstract: An electrode for a discharge lamp is provided with a mayenite compound in at least a part of the electrode that emits secondary electrons, and a surface of a surface layer of the mayenite compound is plasma treated.

Abstract: To provide a method for preparing a mayenite-containing oxide containing a mayenite type compound and having a hydride ion density of at least 1×1018/cm3 without need for expensive facilities, control of complicated reaction conditions or a long period of reaction time. A method for preparing a mayenite-containing oxide, which comprises a firing step of heating a starting material having a molar ratio of CaO:Al2O3 being from 9:10 to 14:5 based on the oxides at a temperature of from 900 to 1,300° C. to obtain a fired powder and a hydrogenation step of firing the fired powder at a temperature of at least 1,210° C. and lower than 1,350° C.

Abstract: The present invention relates to a mayenite-type compound in which a part of Ca of a mayenite-type compound containing Ca, Al and oxygen is substituted by at least one kind of an atom M selected from the group consisting of Be, Mg and Sr, in which the mayenite-type compound has an atom number ratio represented by M/(Ca+M) of from 0.01 to 0.50, and at least a part of free oxygen ions in a mayenite-type crystal structure are substituted by anions of an atom having electron affinity smaller than that of an oxygen atom.