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Title: High sensitivity hexagonal boron nitride lateral neutron detectors

Abstract

Hexagonal boron nitride (h-BN) thermal neutron detectors have demonstrated the highest detection efficiency among all solid-state detectors (at 58% for a detection area of 1 mm 2 and 53% for a detection area of 9 mm 2). However, scaling up the detector size of vertical h-BN detectors is challenging due to increased dark current, capacitance, and surface recombination with the increasing detection area. Here, we report the demonstration of a 29 mm 2 thermal neutron detector fabricated from a freestanding 10B enriched h-BN epilayer of 90 μm in thickness with a detection efficiency of 50% by employing a lateral device geometry. The lateral detector geometry takes advantage of the unique layered structure of h-BN which naturally provides higher in-plane carrier mobilities than those in the vertical direction. Moreover, due to the reduced area of metals in contact with the h-BN material, the detrimental effects associated with the surface recombination at the metal contacts and device capacitance were reduced, which resulted in improved charge collection efficiency and signal to noise ratios. Furthermore, this work laid the ground work for scaling up to large size neutron detectors based on h-BN.

Authors:
 [1];  [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]
  1. Texas Tech Univ., Lubbock, TX (United States). Dept. of Electrical and Computer Engineering
Publication Date:
Research Org.:
Texas Tech Univ., Lubbock, TX (United States)
Sponsoring Org.:
USDOE Advanced Research Projects Agency - Energy (ARPA-E)
OSTI Identifier:
1571783
Alternate Identifier(s):
OSTI ID: 1524460
Grant/Contract Number:  
AR0000964; NA0002927
Resource Type:
Accepted Manuscript
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 114; Journal Issue: 22; Journal ID: ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION

Citation Formats

Maity, A., Grenadier, S. J., Li, J., Lin, J. Y., and Jiang, H. X. High sensitivity hexagonal boron nitride lateral neutron detectors. United States: N. p., 2019. Web. doi:10.1063/1.5098331.
Maity, A., Grenadier, S. J., Li, J., Lin, J. Y., & Jiang, H. X. High sensitivity hexagonal boron nitride lateral neutron detectors. United States. doi:10.1063/1.5098331.
Maity, A., Grenadier, S. J., Li, J., Lin, J. Y., and Jiang, H. X. Mon . "High sensitivity hexagonal boron nitride lateral neutron detectors". United States. doi:10.1063/1.5098331.
@article{osti_1571783,
title = {High sensitivity hexagonal boron nitride lateral neutron detectors},
author = {Maity, A. and Grenadier, S. J. and Li, J. and Lin, J. Y. and Jiang, H. X.},
abstractNote = {Hexagonal boron nitride (h-BN) thermal neutron detectors have demonstrated the highest detection efficiency among all solid-state detectors (at 58% for a detection area of 1 mm2 and 53% for a detection area of 9 mm2). However, scaling up the detector size of vertical h-BN detectors is challenging due to increased dark current, capacitance, and surface recombination with the increasing detection area. Here, we report the demonstration of a 29 mm2 thermal neutron detector fabricated from a freestanding 10B enriched h-BN epilayer of 90 μm in thickness with a detection efficiency of 50% by employing a lateral device geometry. The lateral detector geometry takes advantage of the unique layered structure of h-BN which naturally provides higher in-plane carrier mobilities than those in the vertical direction. Moreover, due to the reduced area of metals in contact with the h-BN material, the detrimental effects associated with the surface recombination at the metal contacts and device capacitance were reduced, which resulted in improved charge collection efficiency and signal to noise ratios. Furthermore, this work laid the ground work for scaling up to large size neutron detectors based on h-BN.},
doi = {10.1063/1.5098331},
journal = {Applied Physics Letters},
number = 22,
volume = 114,
place = {United States},
year = {2019},
month = {6}
}

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Works referenced in this record:

Toward achieving flexible and high sensitivity hexagonal boron nitride neutron detectors
journal, July 2017

  • Maity, A.; Grenadier, S. J.; Li, J.
  • Applied Physics Letters, Vol. 111, Issue 3
  • DOI: 10.1063/1.4995399

Solid-state neutron detectors based on thickness scalable hexagonal boron nitride
journal, January 2017

  • Ahmed, K.; Dahal, R.; Weltz, A.
  • Applied Physics Letters, Vol. 110, Issue 2
  • DOI: 10.1063/1.4973927

Hexagonal boron nitride thin film thermal neutron detectors with high energy resolution of the reaction products
journal, May 2015

  • Doan, T. C.; Majety, S.; Grenadier, S.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 783
  • DOI: 10.1016/j.nima.2015.02.045

Normal Modes in Hexagonal Boron Nitride
journal, June 1966


Anisotropic charge carrier transport in free-standing hexagonal boron nitride thin films
journal, May 2016

  • Dahal, Rajendra; Ahmed, Kawser; Wu, Jia Woei
  • Applied Physics Express, Vol. 9, Issue 6
  • DOI: 10.7567/APEX.9.065801

Fabrication and characterization of solid-state thermal neutron detectors based on hexagonal boron nitride epilayers
journal, June 2014

  • Doan, T. C.; Majety, S.; Grenadier, S.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 748
  • DOI: 10.1016/j.nima.2014.02.031

Effects of surface recombination on the charge collection in h-BN neutron detectors
journal, March 2019

  • Maity, A.; Grenadier, S. J.; Li, J.
  • Journal of Applied Physics, Vol. 125, Issue 10
  • DOI: 10.1063/1.5089138

Realization of highly efficient hexagonal boron nitride neutron detectors
journal, August 2016

  • Maity, A.; Doan, T. C.; Li, J.
  • Applied Physics Letters, Vol. 109, Issue 7
  • DOI: 10.1063/1.4960522

Origin and roles of oxygen impurities in hexagonal boron nitride epilayers
journal, April 2018

  • Grenadier, S. J.; Maity, A.; Li, J.
  • Applied Physics Letters, Vol. 112, Issue 16
  • DOI: 10.1063/1.5026291

Hexagonal boron nitride neutron detectors with high detection efficiencies
journal, January 2018

  • Maity, A.; Grenadier, S. J.; Li, J.
  • Journal of Applied Physics, Vol. 123, Issue 4
  • DOI: 10.1063/1.5017979

High-field effects in photoconducting cadmium sulphide
journal, March 1965


Growth and device processing of hexagonal boron nitride epilayers for thermal neutron and deep ultraviolet detectors
journal, July 2016

  • Doan, T. C.; Li, J.; Lin, J. Y.
  • AIP Advances, Vol. 6, Issue 7
  • DOI: 10.1063/1.4959595

Assessment of Present and Future Large-Scale Semiconductor Detector Systems
journal, January 1985

  • Spieler, Helmuth G.; Haller, Eugene E.
  • IEEE Transactions on Nuclear Science, Vol. 32, Issue 1
  • DOI: 10.1109/TNS.1985.4336867

Hexagonal boron nitride epitaxial layers as neutron detector materials
journal, October 2011

  • Li, J.; Dahal, R.; Majety, S.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 654, Issue 1
  • DOI: 10.1016/j.nima.2011.07.040