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Articolul urmator |
518 27 |
Ultima descărcare din IBN: 2024-03-11 20:30 |
Căutarea după subiecte similare conform CZU |
621.383.4-039.647`231 (1) |
Electrotehnică (1154) |
SM ISO690:2012 SIRKELI, Vadim, NEDEOGLO, Natalia, NEDEOGLO, Dumitru, YILMAZOGLU, Oktay, HAJO, Ahid S., PREU, Sascha, KUPPERS, Franko, HARTNAGEL, Hans Ludwig. ZnSe-based solar-blind ultraviolet photodetectors with different schottky contact metals. In: Studia Universitatis Moldaviae (Seria Ştiinţe Exacte şi Economice), 2021, nr. 2(142), pp. 59-67. ISSN 1857-2073. DOI: https://doi.org/10.5281/zenodo.5094718 |
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Studia Universitatis Moldaviae (Seria Ştiinţe Exacte şi Economice) | |||||||
Numărul 2(142) / 2021 / ISSN 1857-2073 /ISSNe 2345-1033 | |||||||
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DOI:https://doi.org/10.5281/zenodo.5094718 | |||||||
CZU: 621.383.4-039.647`231 | |||||||
Pag. 59-67 | |||||||
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We report on the selection of contact metallisations for ZnSe-based metal-semiconductor-metal ultraviolet photodetectors. Our evaluation is based on Ni/Au, Cr/Au, and hybrid Ag-nanowire contacts. Low values of dark current of 0.32 nA, 0.82 nA and 1.64 nA at bias voltage of 15 V were achieved for photodetectors with Ag-NW, Ni/Au and Cr/Au interdigital contacts, respectively. The best performance of our ZnSe-based ultraviolet photodetectors is observed for Ni/Au interdigital contacts. This is due to the higher Schottky barrier height, which is equal to ~ 1.49 eV for Ni/Au contacts in comparison with ~ 1.26 eV for Cr/Au contacts. A very high responsivity of 5.40 AW-1 at bias voltage of 15 V for light with a wavelength of 325 nm is obtained for devices with Ni/Au interdigital contacts. Moreover, the maximum of photocurrent on/off ratio of 20342 and minimum of NEP of ~ 3 × 10-15 W Hz-1/2 at bias voltage of 15 V was achieved for this type of device. |
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Cuvinte-cheie Zinc selenide, metal-semiconductor-metal structures, Schottky diodes, ultraviolet photodetectors, impact ionization, seleniură de zinc, structuri metal-semiconductor-metal, diode Schottky, fotodetectoare ultraviolete, ionizare prin coliziuni |
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