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The cavity receiver is an important part for solar energy collection. The performance of solar system can be improved by effective coating of TiO2 nanoparticles at receiver end. The utilization of sunlight from UV to visible range or near IR range is an active issue in this field. The energy transfer process activates the photo catalytic reaction on the surface of TiO2. On the other hand, plasmonic materials show size dependable surface Plasmon resonance. Due to oscillations of free electrons in the plasmonic metals, strong light absorption take place and can generate large electric field near the surface. Combining both effect using semiconductor nanoparticles (TiO2) is effective to enhance the efficiency of solar plate receiver.
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