Radiative performance of rare earth garnet thin film selective emitters

Conference · Mon Aug 01 00:00:00 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
• Resource Relation: Conference: 1. National Renewable Energy Laboratory (NREL) conference on thermophotovoltaic generation of electricity, Copper Mountain, CO (United States), 24-27 Jul 1994
• Country of Publication: United States
• Language: English

Related Subjects

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