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Deep UV Photodetectors fabricated from CVD Single Crystal Diamond

Published online by Cambridge University Press:  31 January 2011

Mose Bevilacqua  and
Richard B. Jackman
Mose Bevilacqua
Affiliation:
[email protected], University College London, London Centre for Nanotechnology, London, United Kingdom
Richard B. Jackman
Affiliation:
[email protected]
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Abstract

Deep UV detection using a single crystal diamond (SCD) substrate without a homoepitaxial layer has been demonstrated using a defect passivation treatment. Despite evidence of surface damage on the SCD, the treatments lead to highly effective photoconductive devices, displaying six-orders of discrimination between deep UV and visible light and a responsivity as high as 100A/W, equivalent to an external quantum efficiency of 700, similar to the best values for devices based on high quality homoepitaxial layers. Impedance spectroscopic investigations suggest that the treatment used reduces the impact of less resistive surface material, most likely defects left from substrate polishing.

Keywords

diamonddevicesphotoconductivity
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1203: Symposium J – Diamond Electronics and Bioelectronics-Fundamentals to Applications III , 2009 , 1203-J17-10
Copyright
Copyright © Materials Research Society 2010

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