Laser protective film for satellite solar battery array and preparation method thereof

Abstract

The invention discloses a laser protective film for a satellite solar battery array. The laser protective film consists of a composite laser protective layer and an anti-reflection layer; silicon dioxide and nanometer vanadium dioxide are prepared on the surface of an anti-radiation amorphous quartz glass cover piece of a satellite solar battery piece in sequence by a double-target co-sputtering process as the composite laser protective layer; and magnesium fluoride is prepared by an evaporation process as the anti-reflection layer. The visible light transmission of the laser protective film in a normal state is about 60%; the infrared band transmission is 65-80%; after three wave bands of laser of 532 nm, 1.06 um and 3.3 um are respectively used for irradiation, the laser transmission is reduced to 16%, and the damage threshold of the satellite solar battery piece can be increased by 3-4 times; and the laser protective film is suitable for the field of laser protection of the satellite solar battery array.

Description

[0001] technical field [0002] The invention relates to a laser protective film used for a satellite solar battery array and a preparation method thereof. [0003] Background technique [0004] With the widespread application of satellites and the rapid development of anti-satellite laser weapons, the safety and survivability of satellites are facing increasingly severe threats. Due to the large deployment area, the satellite solar cell array is easy to become the main component of the laser weapon attack. Under the combined effects of high heat, ionization, shock and radiation excited by high-energy beam lasers, it is easy to cause a sharp drop in the power generation efficiency of the solar cell array, or even lose the power generation capacity. The space security and combat capability of satellites have important strategic significance. [0005] Vanadium oxide material, as a light-intensity laser protection material, has become one of the trends and hotspots in ...

AI Technical Summary

Problems solved by technology

The visible light transmittance of single-layer vanadium oxide prepared by conventional technology is low, usually only 30% to 50%. Direct plating on the surface of the solar cell cover glass will cause a significant decrease in the power generation efficiency of the cell. The weak light in the 300nm~500nm band has a relatively obvious absorption peak, so the additional anti-reflection layer has a limited effect on improving the visible light transmittance

In addition, the solar cell glass cover glass is an amorphous quartz glass cover glass. Domestic and foreign studies have shown that it is difficult to crystallize vanadium oxide films deposited on the surface of amorphous optical substrates. Most of the obtained vanadium oxide films are amorphous films. Under equal excitation, it is difficult to show phase transition characteristics