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Cesium Lead Bromide (CsPbBr 3 ) Thin‐Film‐Based Solid‐State Neutron Detector Developed by a Solution‐Free Sublimation Process
Author(s) -
FernandezIzquierdo Leunam,
ReyesBanda Martin Gregorio,
Mathew Xavier,
ChavezUrbiola Iker Rodrigo,
El Bouanani Lidia,
Chang Joseph,
AvilaAvendano Carlos,
Mathews Nini Rose,
PintorMonroy Maria Isabel,
QuevedoLopez Manuel
Publication year - 2020
Publication title -
advanced materials technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.184
H-Index - 42
ISSN - 2365-709X
DOI - 10.1002/admt.202000534
Subject(s) - sublimation (psychology) , materials science , diode , optoelectronics , neutron detection , thin film , analytical chemistry (journal) , ampoule , caesium , trihalide , detector , halide , optics , chemistry , nanotechnology , organic chemistry , composite material , psychology , inorganic chemistry , physics , chromatography , psychotherapist
The majority of solid‐state radiation sensors are predominantly single crystals. However, for low‐cost and large‐area device applications, thin films are a better option. The first evidence of neutron detection using a Gallium Oxide/Cesium Lead Bromide (Ga 2 O 3 /CsPbBr 3 ) solid‐state diode enabled by an innovative close space sublimation (CSS) method that allows deposition of thick CsPbBr 3 films is demonstrated. Furthermore, indirect neutron sensing is achieved using a 10 B layer for diodes biased at voltages as low as –5 V, showing the potential for low‐power operation. The neutron response is enabled by the low leakage current (≈10 −8 A mm –2 ), rectification of ≈10 4 , capacitance as low as 15 pF, and fast response of the Ga 2 O 3 /CsPbBr 3 diode. The superior performance of the CsPbBr 3 is due to the phase purity, stoichiometry control, and large single‐grain columnar growth of the films obtained by the CSS method.