Question

1. Prof. Solovitz would like to improve the efficiency of his car. He knows that the combustion process results in temperatures on the order of 850°C. While this is primarily used to generate compression work, the high temperatures also result in photon emission. By choosing an appropriate semiconductor cell, the professor would like to absorb some of these photons, providinga supplement to his battery a. Three different semiconductors are available to the professor- germanium (Ge), silicon (Si), and carbon (C). Assuming the emission follows a blackbody spectrum, which semiconductor would you recommend? Hint: note that the optimal bandgap wavelength is approximately twice the wavelength of peak blackbody emission.) b. Are there any semiconductor materials available that could perform better? Note: you will likely need to do some external research to answer this question.)

Answer 1

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