Electroinsulated heat sinks for concentrated photovoltaic solar cells

The results of studies of characteristics of heat-removing electrical insulating plates of different designs based on heat-conducting AlN and Al$_{2}$O$_{3}$ ceramics and aluminum-oxide plates based on aluminum plates are presented. Thermophysical parameters of the heat-removing plates were assessed by measuring the temperature of $p$–$n$ junctions of the photoelectric converters mounted on the plates with thermal load applied to them. It was found that the minimum overheating temperature of $p$–$n$ junctions, 45$^\circ$C, was observed at the supplied thermal power of 13 W, when the photoelectric converters were installed on the AlN ceramics. In photoelectric converters installed on the Al$_{2}$O$_{3}$ ceramics, the overheating of $p$–$n$ junctions was 49$^\circ$C, while it reached 70$^\circ$C on the aluminum-oxide substrate.