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Photoionization measurement of deep defects in single-crystalline CVD diamond using the transient-current technique
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Electricity. (Avdelningen för elektricitetslära och åskforskning)ORCID iD: 0000-0003-2197-5352
Element Six Ltd., King’s Ride Park, Ascot, Berkshire, SL5 8BP, United Kingdom.
Element Six Ltd., King’s Ride Park, Ascot, Berkshire, SL5 8BP, United Kingdom.
2006 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 73, no 24, 245207Article in journal (Refereed) Published
Abstract [en]

We have adopted the transient-current technique as a sensitive method to detect small concentrations of charged defects in diamond and to study its photoionization spectrum. It is found that ionized impurity concentrations in the interval 10(9)-10(13) cm(-3) can readily be detected in diamond. By continuously measuring the charge concentration, while illuminating the samples with monochromatic light, the evolution of the charge state of the dominating defect can be continuously monitored. We have obtained the photoionization cross-section spectrum from the dominant deep defect in single-crystalline chemical vapor deposition (CVD) diamond using this method. The photoionization spectrum exhibits an onset at photon energies above E-i=2.2 eV. It is also found that the defect is in the positively charged and acts as an electron trap. The observed spectrum can be attributed to the single substitutional nitrogen impurity.

Place, publisher, year, edition, pages
2006. Vol. 73, no 24, 245207
Keyword [en]
Diamond, Photoionization, Defects
National Category
Condensed Matter Physics
Research subject
Engineering Science with specialization in Science of Electricity
Identifiers
URN: urn:nbn:se:uu:diva-82085DOI: 10.1103/PhysRevB.73.245207ISI: 000238696900051OAI: oai:DiVA.org:uu-82085DiVA: diva2:110000
Available from: 2006-09-15 Created: 2006-09-15 Last updated: 2016-10-26Bibliographically approved

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Isberg, Jan

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