Thermophotovoltaic (TPV) devices are photovoltaic cells which produce electricity from heat sources such as industrial combustion processes, with potentially 100-10,000 times the output of a Si solar cell. Potential applications include industrial waste heat recovery, domestic combined heat and power (CHP), embedded generation, military applications, hydrogen powered transport, and solar concentrator systems.TPV cells currently available use GaSb, an expensive material. This project aims to develop 3-terminal devices based on InGaAs/InP responding to both the 1-1.7 micron infrared region currently covered by GaSb and the shorter 0.5.1 micron region. These will exploit the advantages of cheaper InP substrates and higher efficiency from broader spectral coverage. In the longer term the projectwill assess potential for InP devices grown on Si substrates to address the solar concentrator market.
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01/01/07
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