Theoretical comparison of rare-earth garnet selective emitters

Author

Good, Brian S. ; Chubb, Donald L. ; Wolford, David S.

Author_Institution

NASA Glenn Res. Center, Cleveland, OH, USA

fYear

2000

fDate

2000

Firstpage

1222

Lastpage

1225

Abstract

Spectral control through the use of selective emitters is an important means of improving the efficiency of thermophotovoltaic (TPV) systems. The rare-earth-aluminum garnet selective emitters developed in our laboratory offer a number of potential advantages for use in such systems. In this paper, we present results of a detailed computational study of the effects of thermal gradients, along with some other film parameters, on the performance of three rare-earth-doped aluminum garnet selective emitters, specifically, Er₃Al₅O₁₂, Ho₃Al₅O₁₂, and Tm₃Al ₅O₁₂

Keywords

aluminium compounds; erbium compounds; holmium compounds; light scattering; thermophotovoltaic cells; thulium compounds; Er₃Al₅O₁₂; Ho₃Al₅O₁₂; TPV systems; Tm₃Al₅O₁₂; film emittance model; film parameters; film thickness effects; rare-earth garnet selective emitters; scattering effects; selective emitters; spectal emittance; spectral control; thermal gradients; thermophotovoltaic systems; Aluminum; Boundary conditions; Conductive films; Extinction coefficients; Garnets; Optical films; Scattering; Substrates; Temperature; Thermal conductivity;

fLanguage

English

Publisher

ieee

Conference_Titel

Photovoltaic Specialists Conference, 2000. Conference Record of the Twenty-Eighth IEEE

Conference_Location

Anchorage, AK

ISSN

0160-8371

Print_ISBN

0-7803-5772-8

Type

conf

DOI

10.1109/PVSC.2000.916109

Filename

916109