Generation and transport of photoexcited electrons in single-crystal diamond

Details Generation and transport of photoexcited electrons in single-crystal diamond Generation and transport of photoexcited electrons in single-crystal diamond

2009-02-07

arxiv.org/abs/0902.1208v1

Physics

Condensed Matter

Materials Science

12 pages, 3 figures

Scientific paper

We report time-dependent photocurrent and transport measurements of sub-bandgap photoexcited carriers in nitrogen-rich (type Ib), single-crystal diamond. Transient carrier dynamics are characteristic of trapping conduction with long charge storage lifetimes of ~3 hours. By measuring the photoexcited Hall effect we confirm that the charge carriers are electrons and by varying the excitation energy we observe a strong turn-on in the photoconduction at ~1.9 eV. These findings shed new light on sub-bandgap states in nitrogen doped single-crystal diamond.

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