TY - JOUR
T1 - 3D Microstructured Inorganic Perovskite Materials for Thermal Neutron Detection
AU - Caraveo-Frescas, Jesus A.
AU - Reyes-Banda, Martin G.
AU - Fernandez-Izquierdo, Leunam
AU - Quevedo-Lopez, Manuel A.
N1 - Publisher Copyright:
© 2022 Wiley-VCH GmbH.
PY - 2022/6
Y1 - 2022/6
N2 - A combination of novel techniques such as a solvent-free thin-film deposition, perovskite patterning, and 10B back-fill technique enables the high neutron detection efficiency in a perovskite-based microstructured thermal neutron detector. High-efficiency cesium lead bromide (CsPbBr3) perovskite-based microstructured detectors are demonstrated here. Trenches up to 10 µm deep are etched into the CsPbBr3 thin films using a novel dry etching process involving a combination of HBr and Ar plasma. The microstructured diodes are then backfilled with isotopically enriched boron as neutron conversion material via a sedimentation process to preserve the perovskite integrity. The fabricated microstructured CsPbBr3 thermal neutron detectors show an efficiency of 4.3%. This represents >1.2x efficiency improvement over planar silicon (3.5%) and >2x efficiency improvement over planar CsPbBr3 (2.1%) detectors, respectively. More importantly, gamma-ray discrimination of 107 is measured in CsPbBr3-based microstructured neutron detectors.
AB - A combination of novel techniques such as a solvent-free thin-film deposition, perovskite patterning, and 10B back-fill technique enables the high neutron detection efficiency in a perovskite-based microstructured thermal neutron detector. High-efficiency cesium lead bromide (CsPbBr3) perovskite-based microstructured detectors are demonstrated here. Trenches up to 10 µm deep are etched into the CsPbBr3 thin films using a novel dry etching process involving a combination of HBr and Ar plasma. The microstructured diodes are then backfilled with isotopically enriched boron as neutron conversion material via a sedimentation process to preserve the perovskite integrity. The fabricated microstructured CsPbBr3 thermal neutron detectors show an efficiency of 4.3%. This represents >1.2x efficiency improvement over planar silicon (3.5%) and >2x efficiency improvement over planar CsPbBr3 (2.1%) detectors, respectively. More importantly, gamma-ray discrimination of 107 is measured in CsPbBr3-based microstructured neutron detectors.
KW - Monte-Carlo simulations
KW - etching
KW - neutron detection
KW - perovskites
UR - http://www.scopus.com/inward/record.url?scp=85122354197&partnerID=8YFLogxK
U2 - 10.1002/admt.202100956
DO - 10.1002/admt.202100956
M3 - Artículo
AN - SCOPUS:85122354197
SN - 2365-709X
VL - 7
JO - Advanced Materials Technologies
JF - Advanced Materials Technologies
IS - 6
M1 - 2100956
ER -