Pulse area compensation approach for ballistic deficits correction in perovskite CsPbBr3 semiconductor detector

Abstract

Halide perovskite CsPbBr3 semiconductor has exhibited extraordinary performance on ionizing radiation detection at room temperature in the light of excellent photoelectric properties. However, signals from the CsPbBr3 planar detector usually comprises the long rising edge due to its low hole carrier mobility, subsequently leading to severe ballistic deficits in pulse amplitudes (over 10 %) when the shaping time is inferior to rise time. To overcome this issue, the integrated pulse area approach is proposed and implemented herein to compensate the amplitudes underestimation of pulses particularly with varied rise times. It was verified that the pulse area extracted by this approach was insensitive to the rise time (when varying from 1 to 130 μs) while manifesting the relative variance below 1.49 × 10−5. Accordingly, the bivariate distribution between the integrated pulse area and rise time regarded as unaffected by ballistic deficits was finally accomplished which reflected the actual depth of individual event interactions. The approach is computationally feasible in eliminating the ballistic deficit, and is anticipated to foster the deployment of perovskite detector in radiation detection.