Radiative performance of rare earth garnet thin film selective emitters

Conference · Mon Aug 01 04:00:00 EDT 1994

OSTI ID:6873448

Lowe, R A; Chubb, D L; Good, B S

In this paper the authors present the first emitter efficiency results for the thin film 40 percent Er-1.5 percent Ho YAG (Yttrium Aluminum Garnet, Y3Al5O12) and 25 percent Ho YAG selective emitter at 1500 K with a platinum substrate. Spectral emittance and emissive power measurements were made (1.2 less than lambda less than 3.2 microns). Emitter efficiency and power density are significantly improved with the addition of multiple rare earth dopants. Predicted efficiency results are presented for an optimized (equal power density in the Er, (4)I[sub 15/2]-(4)I[sub 13/2] at 1.5 microns, and Ho, (5)I[sub 7]-(5)I[sub 8] at 2.0 micron emission bands) Er-Ho YAG thin film selective emitter.

• Research Organization: National Aeronautics and Space Administration, Cleveland, OH (United States). Lewis Research Center
• OSTI ID: 6873448
• Report Number(s): N-95-11876; NASA-TM--106722; E--9088; NAS--1.15:106722; CONF-9407100--; CNN: RTOP 233-01-0A
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
140501* -- Solar Energy Conversion-- Photovoltaic Conversion
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CHALCOGENIDES
CONVERSION
DIRECT ENERGY CONVERSION
DIRECT ENERGY CONVERTERS
EFFICIENCY
ELEMENTS
EMISSIVITY
ENERGY CONVERSION
ERBIUM
FERRITE GARNETS
FILMS
HOLMIUM
METALS
MINERALS
OPTICAL PROPERTIES
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PHOTOELECTRIC CELLS
PHOTOVOLTAIC CELLS
PHOTOVOLTAIC CONVERSION
PHYSICAL PROPERTIES
QUANTUM EFFICIENCY
RARE EARTHS
SEMICONDUCTOR DEVICES
SILICATE MINERALS
SURFACE PROPERTIES
THIN FILMS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS