| Budget Amount *help |
¥17,810,000 (Direct Cost: ¥13,700,000、Indirect Cost: ¥4,110,000)
Fiscal Year 2023: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2022: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2021: ¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000)
Fiscal Year 2020: ¥7,800,000 (Direct Cost: ¥6,000,000、Indirect Cost: ¥1,800,000)
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| Outline of Final Research Achievements |
Spectral contorol of near-field radiation is applied for thermophotovoltaic generation of electricity by manufacturing three layered cell consisting of a grid-shape top-electrode, a thin GaSb pn-junction layer and a flat bottom-electrode. The measured absorptance spectrum of the metal-semiconductor-metal structured cell has the maximum peak at the wavelength of 1.65 micrometer which is close to that of the bandgap of GaSb semiconductor. The absorptance reaches the value of 95 %. The obtained short-circuit current density is 9 mA per square-centimeter. Moreover, enen in the case of 100 nm p-n junction semiconductor thickness close to a depletion thickness, the open-circuit voltage reaches the value of 0.32 V. Combined with metal-insulator-metal structured emitter, the spectral controlled radiation flux is 4 times higher than that of blackbody's radiation transfer through numerical simulation.
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