Spaceborne Ray Energy Nanobattery

Abstract

Provided in the invention is a satellite-borne ray-energy nanobattery comprising silicon nanowires, a cesium iodide layer, a bulk silicon emitter, an exhaustion region, a bulk silicon base and a back panel. The silicon nanowires absorb light from an ultraviolet band, a visible band and an infrared band to generate free electrons; and the photon energy is collected by the silicon nanowires, thereby increasing the power density. The cesium iodide layer absorbs a high-energy X ray and a high-energy gamma ray and converts the high-energy ray photon into a photo at the visible band. The bulk silicon emitter and the bulk silicon base collect excessive carriers and absorb perpendicular incidence and secondary reflection photons. A built-in voltage is kept in the exhaustion region to guarantee separation of a photon-generated carrier. The back panel reflects the photons and the photo absorbing probability by the bulk silicon is increased. According to the invention, the surface coating structure of the solar cell is made of a cesium-iodide scintillation crystal material and the response band of eh current solar battery is broadened to the ray region including the x ray and the gamma ray, so that a certain radiation damage protection effect is realized. And thus the power supply demand of the spacecraft in a high-radiation low-illumination space environment can be satisfied.

Description

technical field [0001] The invention relates to the field of energy systems in aerospace technology, in particular to a spaceborne ray energy nano battery. Background technique [0002] With the increase of the payload of the satellite, the energy supply of the satellite has become an important limiting factor for the long-term on-orbit operation of the satellite. There are three main power supply methods for in-orbit spacecraft: solar battery power supply, battery power supply and nuclear energy power supply. [0003] At present, more than 90% of satellites convert sunlight energy into electrical energy through solar cells. The response spectrum of space solar cells is concentrated in the visible light region, the excitation energy source is single, and the mass of the radiation damage protection glass of the space cell is too high, and the mass of the cover sheet accounts for about 50%, which affects the cost-effectiveness of the power system. For missions such as deep s...

AI Technical Summary

Problems solved by technology

Nuclear energy is currently the only way for deep space exploration spacecraft to self-supply, but there are problems such as the need to protect nuclear materials from radiation, and the output power of nuclear batteries gradually decreases with time, and its application is limited.

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