A systematic investigation on the influence of metal-diamond interfaces on the electro-optical properties and on the UV response of CVD diamond photo-detectors was carried out in order to identify the optimal electric contacts maximizing the performance. To this purpose, a set of four nearly identical diamond samples has been grown using the microwave plasma enhanced CVD technique. Micro-Raman spectroscopy and photoluminescence have been utilized to assess their quality. Interdigitated planar contacts have been photolithographically deposited on each sample, using different layered metals. In particular, titanium-gold, chromium-gold, aluminum-gold and gold were selected. The performance of these detectors has been investigated under steady photon irradiation in the 120-300-nm wavelength range. The experimental results have been compared and discussed with respect to I-V characteristics, dark current levels, signal-to-noise ratio, spectral response and time response. © 2001 Elsevier Science B.V. All rights reserved.
Di Benedetto, R., Marinelli, M., Messina, G., Milani, E., Pace, E., Paoletti, A., et al. (2001). Influence of metal-diamond interfaces on the response of UV photoconductors. DIAMOND AND RELATED MATERIALS, 10(3-7), 698-705 [10.1016/S0925-9635(00)00572-0].
Influence of metal-diamond interfaces on the response of UV photoconductors
MARINELLI, MARCO;MILANI, ENRICO;VERONA RINATI, GIANLUCA;
2001-01-01
Abstract
A systematic investigation on the influence of metal-diamond interfaces on the electro-optical properties and on the UV response of CVD diamond photo-detectors was carried out in order to identify the optimal electric contacts maximizing the performance. To this purpose, a set of four nearly identical diamond samples has been grown using the microwave plasma enhanced CVD technique. Micro-Raman spectroscopy and photoluminescence have been utilized to assess their quality. Interdigitated planar contacts have been photolithographically deposited on each sample, using different layered metals. In particular, titanium-gold, chromium-gold, aluminum-gold and gold were selected. The performance of these detectors has been investigated under steady photon irradiation in the 120-300-nm wavelength range. The experimental results have been compared and discussed with respect to I-V characteristics, dark current levels, signal-to-noise ratio, spectral response and time response. © 2001 Elsevier Science B.V. All rights reserved.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
