TECHNOLOGY FOCUS - CERAMICS AND GLASS - Preferred Material: The substrate is made of ceramic or glass.    TECHNOLOGY FOCUS - ELECTRONICS - Preferred Condition: The first adhering comprises organometal that contains p-type impurity, and the second adhering step comprises organometal that contains n-type impurity. The decomposing and oxidizing step comprises a first heat-treating step to form a p-type oxide semiconductor thin film and a second heat-treating step to form an n-type oxide semiconductor thin film. The adhering steps and heat-treating steps are alternately carried out to form a p-n junction. The metal oxide semiconductor thin film is produced using a sol-gel process. Preferred Material: The substrate is made of metal.    TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Component: The organometal also comprises zinc hydroxide, zinc chloride, zinc nitrate, or their hydrates. It is doped with dopant consisting of aluminum nitrate, aluminum chloride, aluminum sulfate, gallium nitrate, gallium chloride, gallium sulfate, indium nitrate, indium chloride, indium sulfate, boron nitrate, boron chloride, boron sulfate, or their hydrates. It further comprises copper sulfate, copper chloride, copper nitrate, sodium cobalt nitrate, sodium cobalt sulfate, sodium cobalt chloride, sodium nickel nitrate, or their hydrates. The dopant also comprises aluminum nitrate, aluminum chloride, aluminum sulfate, sodium nitrate, sodium chloride, sodium sulfate, potassium nitrate, potassium chloride, potassium sulfate, lithium nitrate, lithium chloride, lithium sulfate, or their hydrates.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Component: The organometal comprises zinc acetate, zinc acetylacetonate, zinc formate, their hydrates. It is doped with dopant consisting of aluminum acetate, aluminum chloride, aluminum formate, gallium acetate, gallium formate, indium acetate, indium formate, boron acetate, boron formate, or their hydrates. It further comprises copper acetate, copper formate, nickel acetate, sodium cobalt acetate, sodium cobalt formate, or their hydrates. The dopant also comprises aluminum acetate, aluminum formate, sodium acetate, sodium formate, potassium acetate, potassium formate, lithium acetate, lithium formate, or their hydrates.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Component: The organometal also comprises zinc hydroxide, zinc chloride, zinc nitrate, or their hydrates. It is doped with dopant consisting of aluminum nitrate, aluminum chloride, aluminum sulfate, gallium nitrate, gallium chloride, gallium sulfate, indium nitrate, indium chloride, indium sulfate, boron nitrate, boron chloride, boron sulfate, or their hydrates. It further comprises copper sulfate, copper chloride, copper nitrate, sodium cobalt nitrate, sodium cobalt sulfate, sodium cobalt chloride, sodium nickel nitrate, or their hydrates. The dopant also comprises aluminum nitrate, aluminum chloride, aluminum sulfate, sodium nitrate, sodium chloride, sodium sulfate, potassium nitrate, potassium chloride, potassium sulfate, lithium nitrate, lithium chloride, lithium sulfate, or their hydrates.    TECHNOLOGY FOCUS - POLYMERS - Preferred Material: The substrate is made of heat-resistant plastic.