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Proceedings Paper

Radiative Heat Pumps Using Narrow-Bandgap Semiconductors
Author(s): Paul Berdahl
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Paper Abstract

The Solid State Radiative Heat Pump (SSRHP) concept is introduced. It offers the potential to pump infrared radiation--for heating and cooling--with high second law efficiency. In particular, some of the limitations of Peltier-effect heat pumps can be circumvented. Two approaches for constructing SSRHP devices are described. In one approach the device is a large-area p-n junction, similar to an IR (light) emitting diode. In the second approach one uses orthogonal electric and magnetic fields to alter equilibrium carrier concentrations of electrons and holes near the crystal surface, altering the IR emission due to electron-hole recombination radiation. This phenomenon is usually termed galvanomagnetic luminescence (GML). Either approach can be used to make radiative heat pumps. Materials suitable for SSRHP devices are narrow-bandgap semiconduc-tors with direct bandgaps in the range of 0.03-0.3 eV for room temperature operation.

Paper Details

Date Published: 2 December 1985
PDF: 6 pages
Proc. SPIE 0562, Optical Materials Technology for Energy Efficiency and Solar Energy Conversion IV, (2 December 1985); doi: 10.1117/12.966312
Show Author Affiliations
Paul Berdahl, University of California (United States)


Published in SPIE Proceedings Vol. 0562:
Optical Materials Technology for Energy Efficiency and Solar Energy Conversion IV
Carl M. Lampert, Editor(s)

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