TITLE

Extreme sensitivity displayed by single crystal diamond deep ultraviolet photoconductive devices

AUTHOR(S)
Bevilacqua, Mose; Jackman, Richard B
PUB. DATE
December 2009
SOURCE
Applied Physics Letters;12/14/2009, Vol. 95 Issue 24, p243501
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
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 100 A/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.
ACCESSION #
47039206

 

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