Selective absorbers and interference filters for thermophotovoltaic energy conversion
Abstract
The thermophotovoltaic (TPV) conversion process is investigated in detail. Selective intermediate emitters and black intermediate emitters combined with a 7-layer interference band-pass filter are considered separately. Selective emitters give good performance only with small-bandgap solar cells. The emitter temperature must be around 2000 K, where evaporation is excessive. Black emitters combined with filters must be operated at high temperatures for cells with a bandgap greater than 1 eV. Small-bandgap cells require lower emitter temperatures and give the best TPV conversion efficiency, which for Ge-cells is 1.7 times better than for direct conversion with Si cells at an emitter temperature of 1800 K, where tungsten shows good long-term stability.
- Publication:
-
5th Photovoltaic Solar Energy Conference
- Pub Date:
- 1984
- Bibcode:
- 1984pvse.conf..225H
- Keywords:
-
- Bandpass Filters;
- Energy Technology;
- Photovoltaic Conversion;
- Solar Energy Absorbers;
- Black Body Radiation;
- Design Analysis;
- Emitters;
- Energy Conversion Efficiency;
- Solar Cells;
- Energy Production and Conversion