Feasibility study on solar energy converter using nanotube electron emitter

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In this research, the feasibility of the vacuum type solar energy conversion device which used nanocarbon, such as a carbon nanotube, as an electronic emitter was explored. It is the conversion device which aimed at the conversion drive system which used solar heat and sunlight together. The through-hole-type electron-emission-device with two kinds of heating systems was designed and made, and change of the electron emission characteristic was observed. As a result, by heating the emitter, the electron emission characteristic was found to be improved.In addition, the know-how about optimization of the synthetic conditions of a carbon nanocoil (CNC), fabrication of a carbon nano-needle, porosity processing of Si wafer, and Si-glass junction has been accumulated towards realization of the proposed device.