Ultraviolet photosensitivity of sulfur-doped micro- and nano-crystalline diamond
- Univ. of Puerto Rico, San Juan, PR (United States). Inst. for Functional Nanomaterials and Dept. of Physics
- Univ. of Puerto Rico, San Juan, PR (United States). Inst. for Functional Nanomaterials and Dept. of Chemistry
The room-temperature photosensitivity of sulfur-doped micro- (MCD), submicro- (SMCD) and nano- (NCD) crystalline diamond films synthesized by hot-filament chemical vapor deposition was studied. The structure and composition of these diamond materials were characterized by Raman spectroscopy, scanning electron microscopy and X-ray diffraction. The UV sensitivity and response time were studied for the three types of diamond materials using a steady state broad UV excitation source and two pulsed UV laser radiations. It was found that they have high sensitivity in the UV region, as high as 109 sec-1mV-1 range, linear response in a broad spectral range below 320 nm, photocurrents around ~10-5 A, and short response time better than 100 ns, which is independent of fluency intensity. A phenomenological model was applied to help understand the role of defects and dopant concentration on the materials’ photosensitivity.
- Research Organization:
- Univ. of Puerto Rico, San Juan, PR (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Biological and Environmental Research (BER)
- Grant/Contract Number:
- FG02-08ER46526
- OSTI ID:
- 1076497
- Journal Information:
- Journal of Applied Physics, Vol. 109, Issue 11; ISSN 0021-8979
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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