Fig. 1. Schematic diagram of single spectrum xenon lamp-thermophotovoltaic system

Fig. 2. Spectral energy distribution of xenon lamp

Fig. 3. Surface area division diagram of thermophotovoltaic cell

Fig. 4. Simulation diagram of system optical path

Fig. 5. Variation of received energy on battery surface under differentopening sizes of aggregator

Fig. 6. Radiation uniformity of battery surface under different opening sizes of aggregator

Fig. 7. Energy flux density distribution under different opening sizes of aggregator. (a) H₁=50 mm, L₁=35 mm; (b) H₁=50 mm, L₁=60 mm

Fig. 8. Radiation energy and uniformity varying with aggregator height H₁. (a) 30-100 mm; (b) 40-60 mm

Fig. 9. Surface energy flux density of thermophotovoltaic cell. (a) Without straight funnel secondary concentrator; (b) adding straight funnel secondary concentrator

Fig. 10. Quantum efficiency diagram of JX Crystal GaSb cell

Fig. 11. I-V curve of thermophotovoltaic cell output with or without concentrator