Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Realization of highly efficient hexagonal boron nitride neutron detectors

Journal Article · · Applied Physics Letters
DOI:https://doi.org/10.1063/1.4960522· OSTI ID:1330680
Here, we report the achievement of highly efficient 10B enriched hexagonal boron nitride (h- 10BN) direct conversion neutron detectors. These detectors were realized from freestanding 4-in. diameter h- 10BN wafers 43 μm in thickness obtained from epitaxy growth and subsequent mechanical separation from sapphire substrates. Both sides of the film were subjected to ohmic contact deposition to form a simple vertical “photoconductor-type” detector. Transport measurements revealed excellent vertical transport properties including high electrical resistivity (>1013 Ω cm) and mobility-lifetime (μτ) products. A much larger μτ product for holes compared to that of electrons along the c-axis of h- BN was observed, implying that holes (electrons) behave like majority (minority) carriers in undoped h- BN. Exposure to thermal neutrons from a californium-252 (252Cf) source moderated by a high density polyethylene moderator reveals that 43 μm h- 10BN detectors possess 51.4% detection efficiency at a bias voltage of 400 V, which is the highest reported efficiency for any semiconductor-based neutron detector. The results point to the possibility of obtaining highly efficient, compact solid-state neutron detectors with high gamma rejection and low manufacturing and maintenance costs.
Research Organization:
Texas Tech Univ., Lubbock, TX (United States)
Sponsoring Organization:
Department of Homeland Security (DHS); National Science Foundation (NSF); USDOE; USDOE National Nuclear Security Administration (NNSA); USDOE Office of Nuclear Energy (NE)
Grant/Contract Number:
NA0002927
OSTI ID:
1330680
Alternate ID(s):
OSTI ID: 1295951
Journal Information:
Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 7 Vol. 109; ISSN APPLAB; ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English

References (24)

Deep Ultraviolet Light-Emitting Hexagonal Boron Nitride Synthesized at Atmospheric Pressure. journal November 2007
High-field effects in photoconducting cadmium sulphide journal March 1965
Thermal neutron detection with pyrolytic boron nitride
  • McGregor, D. S.; Unruh, T. C.; McNeil, W. J.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 591, Issue 3 https://doi.org/10.1016/j.nima.2008.03.002
journal July 2008
Hexagonal boron nitride epitaxial layers as neutron detector materials
  • 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 https://doi.org/10.1016/j.nima.2011.07.040
journal October 2011
Fabrication and characterization of solid-state thermal neutron detectors based on hexagonal boron nitride epilayers
  • Doan, T. C.; Majety, S.; Grenadier, S.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 748 https://doi.org/10.1016/j.nima.2014.02.031
journal June 2014
Scalable large-area solid-state neutron detector with continuous p–n junction and extremely low leakage current
  • Huang, Kuan-Chih; Dahal, Rajendra; Lu, James J.-Q.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 763, p. 260-265 https://doi.org/10.1016/j.nima.2014.06.047
journal November 2014
Hexagonal boron nitride thin film thermal neutron detectors with high energy resolution of the reaction products
  • Doan, T. C.; Majety, S.; Grenadier, S.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 783 https://doi.org/10.1016/j.nima.2015.02.045
journal May 2015
Direct-bandgap properties and evidence for ultraviolet lasing of hexagonal boron nitride single crystal journal May 2004
Far-ultraviolet plane-emission handheld device based on hexagonal boron nitride journal September 2009
Epitaxially grown semiconducting hexagonal boron nitride as a deep ultraviolet photonic material journal May 2011
Epitaxial growth and demonstration of hexagonal BN/AlGaN p-n junctions for deep ultraviolet photonics journal February 2012
Self-powered micro-structured solid state neutron detector with very low leakage current and high efficiency journal June 2012
Dielectric strength, optical absorption, and deep ultraviolet detectors of hexagonal boron nitride epilayers journal October 2012
High aspect ratio composite structures with 48.5% thermal neutron detection efficiency journal February 2013
Two-dimensional excitons in three-dimensional hexagonal boron nitride journal November 2013
Charge carrier transport properties in layer structured hexagonal boron nitride journal October 2014
The origins of near band-edge transitions in hexagonal boron nitride epilayers journal February 2016
The physics of solid-state neutron detector materials and geometries journal October 2010
Jahn-Teller effect on exciton states in hexagonal boron nitride single crystal journal May 2009
Condensed-Matter Simulation of a Three-Dimensional Anomaly journal December 1984
A Handheld Neutron-Detection Sensor System Utilizing a New Class of Boron Carbide Diode journal January 2006
Improved High Efficiency Stacked Microstructured Neutron Detectors Backfilled With Nanoparticle $^{6}$LiF journal February 2012
Deep Ultraviolet Light-Emitting Hexagonal Boron Nitride Synthesized at Atmospheric Pressure journal August 2007
Characterization and Field Emission of Sulfur-Doped Boron Nitride Synthesized by Plasma-Assisted Chemical Vapor Deposition journal April 1997

Cited By (14)

A SERS method for thermal neutron detection journal March 2018
Two-dimensional light-emitting materials: preparation, properties and applications journal January 2018
Solid-state neutron detectors based on thickness scalable hexagonal boron nitride journal January 2017
Toward achieving flexible and high sensitivity hexagonal boron nitride neutron detectors journal July 2017
Hexagonal boron nitride neutron detectors with high detection efficiencies journal January 2018
Origin and roles of oxygen impurities in hexagonal boron nitride epilayers journal April 2018
Effects of surface recombination on the charge collection in h-BN neutron detectors journal March 2019
Lateral charge carrier transport properties of B-10 enriched hexagonal BN thick epilayers journal August 2019
High sensitivity hexagonal boron nitride lateral neutron detectors journal June 2019
Critical thickness of hexagonal GaBN/BN heterostructures journal May 2019
Synergy effect of alpha particles by using natural boron in proton therapy: Computational verification journal November 2019
Anisotropic index of refraction and structural properties of hexagonal boron nitride epilayers probed by spectroscopic ellipsometry journal February 2020
Natural optical anisotropy of h-BN: Highest giant birefringence in a bulk crystal through the mid-infrared to ultraviolet range journal February 2018
Review—Hexagonal Boron Nitride Epilayers: Growth, Optical Properties and Device Applications journal September 2016

Similar Records

Hexagonal boron nitride neutron detectors with high detection efficiencies
Journal Article · Mon Jan 22 19:00:00 EST 2018 · Journal of Applied Physics · OSTI ID:1418973

Hexagonal boron nitride: Epitaxial growth and device applications
Journal Article · Wed Nov 04 19:00:00 EST 2020 · Progress in Quantum Electronics · OSTI ID:1848323

Response of alpha particles in hexagonal boron nitride neutron detectors
Journal Article · Tue May 23 20:00:00 EDT 2017 · Applied Physics Letters · OSTI ID:1466219