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Title: Ultraviolet photosensitivity of sulfur-doped micro- and nano-crystalline diamond

Journal Article · · Journal of Applied Physics
DOI:https://doi.org/10.1063/1.3590153· OSTI ID:1076497
 [1];  [1];  [1];  [2];  [1]
  1. Univ. of Puerto Rico, San Juan, PR (United States). Inst. for Functional Nanomaterials and Dept. of Physics
  2. 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
Citation Metrics:
Cited by: 7 works
Citation information provided by
Web of Science

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High-Performance and Self-Powered Deep UV Photodetectors Based on High Quality 2D Boron Nitride Nanosheets journal December 2017
A Comprehensive Review of Semiconductor Ultraviolet Photodetectors: From Thin Film to One-Dimensional Nanostructures journal August 2013