Abstract
AbstractThe 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 (Ga2O3/CsPbBr3) solid‐state diode enabled by an innovative close space sublimation (CSS) method that allows deposition of thick CsPbBr3 films is demonstrated. Furthermore, indirect neutron sensing is achieved using a 10B 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 ≈104, capacitance as low as 15 pF, and fast response of the Ga2O3/CsPbBr3 diode. The superior performance of the CsPbBr3 is due to the phase purity, stoichiometry control, and large single‐grain columnar growth of the films obtained by the CSS method.
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