Abstract: A neutron beam detecting device according to the invention includes: a first solar cell-type detector that is provided with, on a surface thereof, a conversion film for converting neutrons into photons or any charged particle beam among alpha particles, protons, lithium nuclei, gamma rays or beta rays, and generates a current in response to incident radiation; a radiation detector that generates a current insensitive to neutrons as an output signal in response to the radiation incident; a current measuring device that detects, as signals, the current generated by the first solar cell-type detector and the current generated by the radiation detector in response to the incident radiation; and a flux calculating unit that compares the current signals from the detectors which are detected by the current measuring device.

Abstract: Disclosed is a solar cell for use in space, comprising compound semiconductors used as photovoltaic conversion material. The solar cell comprises a cover glass used for improving the radiation tolerance as a substrate for thin film deposition. The solar cell further comprises a crystalline thin film of the compound semiconductors directly formed on a surface of the cover glass for acting as the photovoltaic conversion material. The crystalline thin film of compound semiconductors is formed using a metal organic chemical vapor deposition system.

Abstract: Disclosed is a solar cell for use in space, comprising compound semiconductors used as photovoltaic conversion material. The solar cell comprises a cover glass used for improving the radiation tolerance as a substrare for thin film deposition. The solar cell further comprises a crystalline thin film of the compound semiconductors directly formed on a surface of the cover glass for acting as the photovoltaic conversion material. The crystalline thin film of compound semiconductors is formed using a metal organic chemical vapor deposition system.