Advancements in microstructured semiconductor neutron detector (MSND)-based instruments

Fronk, Ryan G.; Bellinger, Steven L.; Henson, Luke C.; Huddleston, David E.; Ochs, Taylor R.; Reichenberger, Michael A.; Rietcheck, Cody J.; Smith, Colten T.; Sobering, Timothy J.; Shultis, J. Kenneth; McGregor, Douglas S.

doi:10.1109/nssmic.2015.7581971

Cited by 4 publications

(1 citation statement)

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“…[32] To achieve higher efficiencies, microstructured silicon diodes, backfilled with a neutron conversion material, have been demonstrated. [33][34][35] Semiconductor patterning greatly increases surface area, thus increasing neutron capture probability. Furthermore, thin-film-based microstructured detectors can be scaled for large-area applications.…”

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confidence: 99%

3D Microstructured Inorganic Perovskite Materials for Thermal Neutron Detection

Caraveo-Frescas

Reyes-Banda

Fernández‐Izquierdo

et al. 2022

Adv Materials Technologies

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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.

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confidence: 99%