COMPUTATIONAL DESIGN OF OPTICAL COATINGS FOR THERMAL CONTROL OF THIN FILM CU(IN, GA)SE2 SOLAR CELL FOR SPACE APPLICATIONS

摘要

Thin film Cu(In, Ga)Se2 solar cells have a lot of promise because of their superior radiation tolerance. Appropriate thermal radiative properties are required for thin film CIGS solar cells to preserve their flexibility and light weight. Due to the very low thermal emissivity, optical coatings have the appropriate thermal radiative properties are necessary to apply to the CIGS solar cell for space applications. An optimization technique to simultaneously determine the optimum thickness and sequence of the materials was employed in designing the coatings. The design method and calculated results of the optical coatings are shown. The designed optical coatings have several features that are the anti-reflection for improving efficiency, including the reflection of useless nearinfrared radiation and the enhancement of emissivity. The designed optical coatings have the potential to reduce the temperature of CIGS solar cells more than 40 °C.