Electric Field Dependence on Charge Collection of CdZnTe X-Ray Detectors

A Wet‐Fusing Assembly Strategy for Forming Low Dark Current 2D/3D Perovskite X‐Ray Detector on a Thin Film Transistor Backplane

“…[12,27] In order to demonstrate the performance stability of our 2D/3D perovskite X-ray detector, we conducted a photoresponse analysis after storing the device for several days (Detailed information is plotted in Figure S8, Supporting Information). The detector demonstrated consistent performance after undergoing harsh accelerated aging conditions with a temperature of 85 °C in a high-moisture atmosphere (RH 60%) for 48 h. The X-ray response of 2D-3D heterostructure X-ray detector under 0.5, 2.5, 5, and 7.5 V mm −1 ; c) X-ray response current densities as a function of dose rate at different applied electric fields; d) Electric field versus X-ray sensitivity in this 2D-3D heterostructure X-ray detector, X-ray detectors based on a-Se [25] and CdZnTe [28] are also marked here for comparison; e) X-ray sensitivity versus dark current density in this 2D-3D heterostructure X-ray detector and published results for X-ray detectors based on various polycrystalline and singlecrystalline perovskite [12,27a,c,32] as well as a-Se [25] and CdZnTe [28,33] ; f) Dose rate-dependent SNR of the 2D-3D heterostructure detector (electric field of 7.5 V mm −1 ).…”

“…Similarly, CdZnTe X‐ray detectors have been reported to reach 2400 µGyair −1 cm −2 when a relatively high electric field of 294.1 V mm −1 is applied. [ 28 ] The performance of the 2D/3D MHP detector in this work was compared to those of previously reported devices by plotting the dark current density of the detectors against their sensitivities in Figure 3e. At 0.5 V mm −1 , the ITO/2D/3D/Au detectors exhibit a better sensitivity than commercial a‐Se, and the dark current density was only 2.6 × 10 −10 A cm −2 , which is quite close to a‐Se (1.0 × 10 −10 A cm −2 ).…”

“…a) The 2D‐3D heterostructure X‐ray detector; b) The X‐ray response of 2D‐3D heterostructure X‐ray detector under 0.5, 2.5, 5, and 7.5 V mm −1 ; c) X‐ray response current densities as a function of dose rate at different applied electric fields; d) Electric field versus X‐ray sensitivity in this 2D‐3D heterostructure X‐ray detector, X‐ray detectors based on a‐Se [ 25 ] and CdZnTe [ 28 ] are also marked here for comparison; e) X‐ray sensitivity versus dark current density in this 2D‐3D heterostructure X‐ray detector and published results for X‐ray detectors based on various polycrystalline and single‐crystalline perovskite [ 12,27a,c,32 ] as well as a‐Se [ 25 ] and CdZnTe [ 28,33 ] ; f) Dose rate‐dependent SNR of the 2D‐3D heterostructure detector (electric field of 7.5 V mm −1 ).…”