Abstract

In this paper, the authors present the thermophotovoltaic (TPV) converter emitter efficiency results for a thin film 25% Ho YAG (yttrium aluminum garnet, Y/sub 3/Al/sub 5/O/sub 12/) selective emitter from 1000-1700 K with a platinum substrate. Spectral emittance and emissive power measurements were made (1.2</spl lambda/<3.2 /spl mu/m) and used to calculate the radiative efficiency. The radiative efficiency and power density of rare earth doped selective emitters are strongly dependent on temperature and experimental results indicate an optimum temperature (1650 K for Ho YAG) for TPV applications.

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