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Segregated tandem filter for enhanced conversion efficiency in a thermophotovoltaic energy conversion system

Patent ·
OSTI ID:871284
 [1];  [1];  [2]
  1. Clifton Park, NY
  2. Middlegrove, NY
+ Show Author Affiliations
A filter system to transmit short wavelength radiation and reflect long wavelength radiation for a thermophotovoltaic energy conversion cell comprises an optically transparent substrate segregation layer with at least one coherent wavelength in optical thickness; a dielectric interference filter deposited on one side of the substrate segregation layer, the interference filter being disposed toward the source of radiation, the interference filter including a plurality of alternating layers of high and low optical index materials adapted to change from transmitting to reflecting at a nominal wavelength .lambda..sub.IF approximately equal to the bandgap wavelength .lambda..sub.g of the thermophotovoltaic cell, the interference filter being adapted to transmit incident radiation from about 0.5.lambda..sub.IF to .lambda..sub.IF and reflect from .lambda..sub.IF to about 2.lambda..sub.IF ; and a high mobility plasma filter deposited on the opposite side of the substrate segregation layer, the plasma filter being adapted to start to become reflecting at a wavelength of about 1.5.lambda..sub.IF.
Research Organization:
Knolls Atomic Power Laboratory (KAPL), Niskayuna, NY
DOE Contract Number:
AC12-76SN00052
Assignee:
United States of America as represented by United States (Washington, DC)
Patent Number(s):
US 5700332
OSTI ID:
871284
Country of Publication:
United States
Language:
English

References (4)

Thermophotovoltaic devices utilizing a back surface reflector for spectral control
  • Charache, G. W.; DePoy, D. M.; Baldasaro, P. F.
  • The 2nd NREL conference on thermophotovoltaic generation of electricity, AIP Conference Proceedings https://doi.org/10.1063/1.49697
conference January 1996
Interference filters for thermophotovoltaic solar energy conversion journal December 1983
Feasibility assessment of low temperature voltaic energy conversion report April 1994
Heat mirror coatings for energy conserving windows journal November 1981

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