التفاصيل البيبلوغرافية
| العنوان: |
Thermionic performance of nanocrystalline diamond/silicon structures under concentrated solar radiation. |
| المؤلفون: |
Bellucci, A.1 (AUTHOR) alessandro.bellucci@ism.cnr.it, Pede, B.2 (AUTHOR), Mastellone, M.1 (AUTHOR), Valentini, V.1 (AUTHOR), Polini, R.1,2 (AUTHOR), Trucchi, D.M.1 (AUTHOR) |
| المصدر: |
Ceramics International. Jul2023:Part B, Vol. 49 Issue 14, p24351-24355. 5p. |
| مصطلحات موضوعية: |
*DIAMOND thin films, *ELECTRON emission, *SOLAR radiation, *THERMIONIC emission, *LIGHT sources, *SOLAR spectra, *ELECTRON field emission, *DIAMOND crystals |
| مستخلص: |
Thin films of nanocrystalline diamond with thickness around 100 nm were deposited on highly doped p-type silicon substrates to evaluate the electron emission performance of these structures under illumination of concentrated sunlight in the temperature range 500–700 °C. By comparing the emitted current densities measured using a pure thermal source and a concentrated light source simulating the solar radiation spectrum (Xe lamp), an increase up to about 80 times at 600 °C was found using the concentrated light source, thus demonstrating the boost on the thermionic emission thanks to the sunlight absorption. At temperatures higher than 600 °C the action of the photon-enhanced thermionic emission (PETE) mechanism begins to vanish, starting the regime of pure thermionic emission. The opening of the quasi-Fermi levels reducing the barrier height down to 0.33 eV for electron emission is considered to explain the overall behavior of the diamond-silicon system in the PETE regime. [ABSTRACT FROM AUTHOR] |
| قاعدة البيانات: |
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