NOVELTY - A solar concentrator device (100) comprises solar converter cells(s) (102), heat sink (104), and liquid metal (106) between solar converter cell and heat sink, for thermally coupling solar converter cell and heat sink during device operation. Each solar cell comprise germanium, gallium arsenide and gallium indium phosphide, respectively. The solar concentrator device further comprises desiccant insert comprising desiccating material, silica gel, molecular sieve and/or desiccating material dispersed in polymer matrix. The liquid metal comprises gallium alloy having melting point of 10.5-15 degrees C.    USE - A solar concentrator device for converting sunlight into electricity.    ADVANTAGE - Coupling solar converter cells to heat sink results in reduction in number of parts, costs and production time. The solar converter cell has efficiency (conversion efficiency of light energy into electricity) of greater than 20% with incident solar power level of 400 suns i.e. 40 W/cm2. The solar concentrator device has liquid metal that provides higher efficiency thermal interface so that higher power level operations can be supported without having to switch to more expensive cooling techniques; can further serve as electrical conduit to solar converter cell; is used without involving any time consuming processing steps; is very easy to uniformly distribute between solar converter cell and heat sink with minimal clamping pressure; and allows solar concentrator device to be easily disassembled/reworked and re-assembled as needed. The solar concentrator devices are expected to have lifetime of 10 years-20 years.    DETAILED DESCRIPTION - The liquid metal comprises alloy of gallium with indium, bismuth, antimony, tin and/or lead. The heat sink comprises adherence layer comprising titanium, chromium, stainless steel, tantalum, tungsten, molybdenum, nickel and/or vanadium; and wetting layer comprising gold and/or platinum. An INDEPENDENT CLAIM is included for fabrication of solar concentrator device.    DESCRIPTION OF DRAWING(S) - The drawing shows a cross-sectional view of a solar concentrator device.    Solar concentrator device (100)    Solar converter cells (102)    Heat sink (104)    Liquid metal (106)    Retainer (108)