| Autor: |
El Bouanani L; Department of Materials Science and Engineering, The University of Texas at Dallas, 800 W Campbell Road, Richardson, Texas 75080, United States.; Department of Electrical Engineering, The University of Texas at Dallas, 800 W Campbell Road, Richardson, Texas 75080, United States., Keating SE; Department of Chemistry, The University of Texas at Dallas, 800 W Campbell Road, Richardson, Texas 75080, United States., Avila-Avendano C; Department of Materials Science and Engineering, The University of Texas at Dallas, 800 W Campbell Road, Richardson, Texas 75080, United States., Reyes-Banda MG; Department of Materials Science and Engineering, The University of Texas at Dallas, 800 W Campbell Road, Richardson, Texas 75080, United States., Pintor-Monroy MI; Department of Materials Science and Engineering, The University of Texas at Dallas, 800 W Campbell Road, Richardson, Texas 75080, United States., Singh V; Department of Materials Science and Engineering, The University of Texas at Dallas, 800 W Campbell Road, Richardson, Texas 75080, United States., Murillo BL; Department of Materials Science and Engineering, The University of Texas at Dallas, 800 W Campbell Road, Richardson, Texas 75080, United States.; Department of Electrical Engineering, The University of Texas at Dallas, 800 W Campbell Road, Richardson, Texas 75080, United States., Higgins M; Department of Chemistry, The University of Texas at Dallas, 800 W Campbell Road, Richardson, Texas 75080, United States., Quevedo-Lopez MA; Department of Materials Science and Engineering, The University of Texas at Dallas, 800 W Campbell Road, Richardson, Texas 75080, United States. |
| Abstrakt: |
Perovskite-based semiconductors, such as methylammonium and cesium lead halides (MPbX 3 : M = CH 3 NH 3 + 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 MAPbBr 3 and gallium oxide (Ga 2 O 3 ) thin film. The MAPbBr 3 /Ga 2 O 3 diodes demonstrate a leakage current of ∼7 × 10 -10 A/mm 2 , an on/off ratio of ∼10 2 , 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 MAPbBr 3 /Ga 2 O 3 diodes also demonstrate a neutron detection efficiency of ∼3.92% when combined with a 10 B neutron conversion layer. |
