Jpn. J. Appl. Phys. 39 (2000) pp. 1957-1961  |Next Article|  |Table of Contents|
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Selective Emission of Al₂O₃/Er₃Al₅O₁₂ Eutectic Composite for Thermophotovoltaic Generation of Electricity

Hitoshi Sai, Hiroo Yugami, Kazuya Nakamura, Narihito Nakagawa¹, Hideki Ohtsubo¹ and Shigenao Maruyama²

(Received July 5, 1999; accepted for publication December 27, 1999)

The emissive properties of Al₂O₃/Er₃Al₅O₁₂ eutectic composite were measured in the temperature range of 1000 to 1700 K. It was confirmed that the Al₂O₃/Er₃Al₅O₁₂ eutectic composite has selective emission bands at a wavelength of 1.5 µm attributable to Er³⁺ ions. It is found that the intensity obeys the T⁴-law. The emittance of over 0.8 is observed in the selective region. Since these emission bands match up the sensitive region of the GaSb PV cell spectrally, the Al₂O₃/Er₃Al₅O₁₂ eutectic composite is a suitable emitter material for using in thermophotovoltaic generation systems. The effects of temperature and thickness on the selective emission efficiency have been studied and discussed.

URL: http://jjap.jsap.jp/link?JJAP/39/1957/
DOI: 10.1143/JJAP.39.1957

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