Spectral Transmittance Analysis of Liquids for High Concentration III-V Photovoltaic Immersion Cooling Applications

Direct liquid immersion cooling has been proposed for HCPV systems with densely packed III-V cells. The system output depends on optical properties of immersion liquids. Eight liquids might be adopted for high concentration III-V photovoltaic immersion cooling applications are investigated. Their transmittance is determined using transmittance measurement of two path-length cuvettes via spectrophotometer. Jnp of bottom subcell of specified 3-junction cells decreased. In relation to bottom subcell generates an excess current, this is a beneficial property. Selected liquids are suitable for immersing 3-junction cells. Therminol VP-1 immersion would cause the smallest power loss of cells, followed by dimethyl silicon oil.