Ionoluminescence characterization of microwave and hot-filament CVD diamonds

H. Calvo Del Castillo, J. L. Ruvalcaba, E. Belmont, T. Calderón, R. Meléndrez, M. Barboza-Flores*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

The ionoluminescence (IL) spectrum resulting through the interaction of proton beams with bulk samples has become an adequate technique for material characterization. In the present work, we have investigated the IL response of microwave (MW) and hot-filament (HF) CVD diamonds, by examining the radiative recombination induced by a 1.9 MeV proton beam (0.25-3.0 μA) on the diamond films. The IL spectral characteristics were different for dissimilar diamond films. The HFCVD diamond showed two broad IL bands around 300-450 nm and/or 500-750 nm. The bands may be associated to intrinsic defects and to [N-V] and [N-V-N] centers. In some cases the H3-center band around 503 nm (2.46 eV) was also clearly depicted. The HFCVD diamond displayed mainly a well-defined dislocation-related A band centered at 440 nm (2.82 eV). The results indicated that the IL technique is a practical tool to obtain spectral information about defects and centers in CVD diamonds.

Original languageEnglish
Pages (from-to)2221-2225
Number of pages5
JournalPhysica Status Solidi (A) Applications and Materials Science
Volume205
Issue number9
DOIs
StatePublished - Sep 2008

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