TY - JOUR
T1 - Solid-State Neutron Detection Based on Methylammonium Lead Bromide Perovskite Single Crystals
AU - El Bouanani, Lidia
AU - Keating, Sheila E.
AU - Avila-Avendano, Carlos
AU - Reyes-Banda, Martin Gregorio
AU - Pintor-Monroy, Maria Isabel
AU - Singh, Vidushi
AU - Murillo, Bayron L.
AU - Higgins, Marissa
AU - Quevedo-Lopez, Manuel A.
N1 - Publisher Copyright:
©
PY - 2021/6/23
Y1 - 2021/6/23
N2 - Perovskite-based semiconductors, such as methylammonium and cesium lead halides (MPbX3: M = CH3NH3+ or Cs+ X = I-, Br-, or Cl-), have attracted immense attention for several applications, including radiation detection, due to their excellent electronic and optical properties.1,2,3,4,5,6 In addition, the combination of perovskites with other materials enables unique device structures. For example, robust and reliable diodes result when combined with metal oxide semiconductors. This device can be used for detection of nonionizing and ionizing radiation. In this paper, we report a unique perovskite single-crystal-based neutron detector using a heterojunction diode based on single-crystal MAPbBr3 and gallium oxide (Ga2O3) thin film. The MAPbBr3/Ga2O3 diodes demonstrate a leakage current of ∼7 × 10-10 A/mm2, an on/off ratio of ∼102, an ideality factor of 1.41, and minimal hysteresis that enables alpha particle, gamma-ray, and neutron detection at a bias as low as (-5 V). Gamma discrimination is further improved by 85% by optimizing the thickness of the perovskite single crystal. The MAPbBr3/Ga2O3 diodes also demonstrate a neutron detection efficiency of ∼3.92% when combined with a 10B neutron conversion layer.
AB - Perovskite-based semiconductors, such as methylammonium and cesium lead halides (MPbX3: M = CH3NH3+ or Cs+ X = I-, Br-, or Cl-), have attracted immense attention for several applications, including radiation detection, due to their excellent electronic and optical properties.1,2,3,4,5,6 In addition, the combination of perovskites with other materials enables unique device structures. For example, robust and reliable diodes result when combined with metal oxide semiconductors. This device can be used for detection of nonionizing and ionizing radiation. In this paper, we report a unique perovskite single-crystal-based neutron detector using a heterojunction diode based on single-crystal MAPbBr3 and gallium oxide (Ga2O3) thin film. The MAPbBr3/Ga2O3 diodes demonstrate a leakage current of ∼7 × 10-10 A/mm2, an on/off ratio of ∼102, an ideality factor of 1.41, and minimal hysteresis that enables alpha particle, gamma-ray, and neutron detection at a bias as low as (-5 V). Gamma discrimination is further improved by 85% by optimizing the thickness of the perovskite single crystal. The MAPbBr3/Ga2O3 diodes also demonstrate a neutron detection efficiency of ∼3.92% when combined with a 10B neutron conversion layer.
KW - CHNHPbBr
KW - MAPbBr
KW - alpha detection
KW - gamma detection
KW - methylammonium lead bromide
KW - neutron detection
KW - perovskite single crystal
KW - radiation detection
UR - http://www.scopus.com/inward/record.url?scp=85108617242&partnerID=8YFLogxK
U2 - 10.1021/acsami.1c03580
DO - 10.1021/acsami.1c03580
M3 - Artículo
C2 - 34106674
AN - SCOPUS:85108617242
SN - 1944-8244
VL - 13
SP - 28049
EP - 28056
JO - ACS Applied Materials and Interfaces
JF - ACS Applied Materials and Interfaces
IS - 24
ER -