Photonic Crystals for Enhancing Thermophotovoltaic Energy Conversion

LIN, SHAWN-YU ; FLEMING, JAMES G. ; MORENO, JOSEPH A.

Sandia National Laboratories

关键词: 30 Direct Energy Conversion;    14 Solar Energy;    Reflection;    Wavelengths;    Photovoltaic Cells;   

DOI  :  10.2172/809620
RP-ID  :  SAND2003-0845
RP-ID  :  AC04-94AL85000
RP-ID  :  809620

美国|英语

来源: UNT Digital Library

【 摘 要 】

Thermophotovoltaics (TPV) converts the radiant energy of a thermal source into electrical energy using photovoltaic cells. TPV has a number of attractive features, including: fuel versatility (nuclear, fossil, solar, etc.), quiet operation, low maintenance, low emissions, light weight, high power density, modularity, and possibility for cogeneration of heat and electricity. Some of these features are highly attractive for military applications (Navy and Army). TPV could also be used for distributed power and automotive applications wherever fuel cells, microturbines, or cogeneration are presently being considered if the efficiencies could be raised to around 30%. This proposal primarily examine approaches to improving the radiative efficiency. The ideal irradiance for the PV cell is monochromatic illumination at the bandgap. The photonic crystal approach allows for the tailoring of thermal emission spectral bandwidth at specific wavelengths of interest. The experimental realization of metallic photonic crystal structures, the optical transmission, reflection and absorption characterization of it have all been carried out in detail and will be presented next. Additionally, comprehensive models of TPV conversion has been developed and applied to the metallic photonic crystal system.