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

Abstract

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}.

Inventors:
; ;
Publication Date:
Research Org.:
KAPL Inc., Schenectady, NY (United States)
Sponsoring Org.:
USDOE Assistant Secretary for Nuclear Energy, Washington, DC (United States)
OSTI Identifier:
663493
Patent Number(s):
PATENTS-US-A8678741
Application Number:
ON: DE98007416; PAN: 8-678,741; TRN: AHC29818%%330
Assignee:
US Dept. of Washington, DC (United States)
DOE Contract Number:  
AC12-76SN00052
Resource Type:
Patent Application
Resource Relation:
Other Information: PBD: 1996
Country of Publication:
United States
Language:
English
Subject:
30 DIRECT ENERGY CONVERSION; THERMOPHOTOVOLTAIC CONVERTERS; ELECTROMAGNETIC FILTERS; DESIGN; ENERGY EFFICIENCY; SPECTRALLY SELECTIVE SURFACES; WAVELENGTHS

Citation Formats

Brown, E J, Baldasaro, P F, and Dziendziel, R J. Segregated tandem filter for enhanced conversion efficiency in a thermophotovoltaic energy conversion system. United States: N. p., 1996. Web.
Brown, E J, Baldasaro, P F, & Dziendziel, R J. Segregated tandem filter for enhanced conversion efficiency in a thermophotovoltaic energy conversion system. United States.
Brown, E J, Baldasaro, P F, and Dziendziel, R J. 1996. "Segregated tandem filter for enhanced conversion efficiency in a thermophotovoltaic energy conversion system". United States. https://www.osti.gov/servlets/purl/663493.
@article{osti_663493,
title = {Segregated tandem filter for enhanced conversion efficiency in a thermophotovoltaic energy conversion system},
author = {Brown, E J and Baldasaro, P F and Dziendziel, R J},
abstractNote = {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}.},
doi = {},
url = {https://www.osti.gov/biblio/663493}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1996},
month = {12}
}