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Title: Boron–oxygen complex yields n-type surface layer in semiconducting diamond

Journal Article · · Proceedings of the National Academy of Sciences of the United States of America
ORCiD logo [1];  [1];  [2];  [3];  [4];  [5];  [4]; ORCiD logo [4]
  1. Qufu Normal Univ., Shandong (China); Northwestern Univ., Evanston, IL (United States)
  2. Univ. of Missouri, Columbia, MO (United States)
  3. Univ. of Alberta, Edmonton, AB (Canada)
  4. Northwestern Univ., Evanston, IL (United States)
  5. Univ. of Bayreuth (Germany)

Diamond is a wide-bandgap semiconductor possessing exceptional physical and chemical properties with the potential to miniaturize high-power electronics. Whereas boron-doped diamond (BDD) is a well-known p-type semiconductor, fabrication of practical diamond-based electronic devices awaits development of an effective n-type dopant with satisfactory electrical properties. Here we report the synthesis of n-type diamond, containing boron (B) and oxygen (O) complex defects. We obtain high carrier concentration (~0.778 × 1021cm-3) several orders of magnitude greater than previously obtained with sulfur or phosphorous, accompanied by high electrical conductivity. In high-pressure high-temperature (HPHT) boron-doped diamond single crystal we formed a boron-rich layer ~1–1.5 μm thick in the {111} surface containing up to 1.4 atomic % B. We show that under certain HPHT conditions the boron dopants combine with oxygen defects to form B–O complexes that can be tuned by controlling the experimental parameters for diamond crystallization, thus giving rise to n-type conduction. First-principles calculations indicate that B3O and B4O complexes with low formation energies exhibit shallow donor levels, elucidating the mechanism of the n-type semiconducting behavior.

Research Organization:
George Washington Univ., Washington, DC (United States); Univ. of Missouri, Columbia, MO (United States); Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA), Office of Defense Programs (DP); USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
NA0003858; SC0019114; AC02-06CH11357
OSTI ID:
1599893
Journal Information:
Proceedings of the National Academy of Sciences of the United States of America, Vol. 116, Issue 16; ISSN 0027-8424
Publisher:
National Academy of SciencesCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 43 works
Citation information provided by
Web of Science

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Cited By (5)

Tailoring of nitrogen-vacancy colour centers in diamond epilayers by in situ sulfur and nitrogen anion engineering journal December 2019
Enhanced strength of nano-polycrystalline diamond by introducing boron carbide interlayers at the grain boundaries journal January 2020
Ultrahigh Thermoelectric Performance Realized in Black Phosphorus System by Favorable Band Engineering through Group VA Doping journal July 2019
Discovery of pressure‐induced monoclinic to monoclinic phase transition above 60 GPa in single crystal NaAlSi 2 O 6 jadeite journal January 2020
Ultrananocrystalline Diamond Nanowires: Fabrication, Characterization, and Sensor Applications journal January 2021

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