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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}. 10 figs.

Inventors:
; ;
Issue Date:
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
567171
Patent Number(s):
5,700,332
Application Number:
PAN: 8-678,741
Assignee:
Dept. of Energy, Washington, DC (United States) PTO; SCA: 300800; PA: EDB-98:017730; SN: 98001896305
Resource Type:
Patent
Resource Relation:
Other Information: PBD: 23 Dec 1997
Country of Publication:
United States
Language:
English
Subject:
30 DIRECT ENERGY CONVERSION; THERMOPHOTOVOLTAIC CONVERTERS; ELECTROMAGNETIC FILTERS; DESIGN; TRANSMISSION; REFLECTION

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., 1997. 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. Tue . "Segregated tandem filter for enhanced conversion efficiency in a thermophotovoltaic energy conversion system". United States.
@article{osti_567171,
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}. 10 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1997},
month = {12}
}