High-performance direct conversion X-ray detectors based on sintered hybrid lead triiodide perovskite wafers

Sensitive Direct Converting X‐Ray Detectors Utilizing Crystalline CsPbBr3 Perovskite Films Fabricated via Scalable Melt Processing

“…This linear dependency (as well as the enhanced amount of the extracted charge) is consistent with the IV characteristics at reverse bias and under steady‐state illumination given in Figure S9 (Supporting Information). It should be emphasized that the TOF transients are not as well resolved as in our previous studies . However, the hole‐mobility is roughly 40% compared to reported values on Bridgman grown CsPbBr 3 single crystals and is consistent with the theoretical polaron hole mobility, 41.3 cm 2 V −1 s −1 for CsPbBr 3 .…”

“…Beside the high costs, most limiting is the small size of the Cd(Zn)Te wafers. On the other hand, metal‐halide perovskites for direct X‐ray to current converter showed a rapid progress and are approaching the performance of single crystalline Cd(Zn)Te detectors . Wei et al reported solution grown metal‐halide perovskite single crystal devices providing a up to two orders in magnitude reduction of the total dose required for medical imaging compared to a‐Se imaging systems.…”

Ultrafast Ionizing Radiation Detection by p–n Junctions Made with Single Crystals of Solution‐Processed Perovskite

“…[2] Recent reports on X-ray and gamma-ray detection based on organometallic perovskites (MAPbX 3 , where MA = CH 3 NH 3 and X = Cl, Br, or I) have shown high sensitivity and low detectable dose, suggesting that this material could be applied in low-dose X-ray and gamma-ray imaging. [3,5,6] In devices www.advelectronicmat.de with Se atoms and generate Pb-Se binding when the precursor solution is made up of methylammonium and acid radicals. In devices with polycrystalline perovskite, at least two blocking layers, including MAPbBr 3 films, ZnO films, fullerene-derivative phenyl-C61-butyric acid methyl ester (PCBM), C 60 , and other organic materials, are used to decrease the injected current, which leads to low stability and difficult-to-maintain storage conditions.…”

Exploring Lead‐Free Hybrid Double Perovskite Crystals of (BA)2CsAgBiBr7 with Large Mobility‐Lifetime Product toward X‐Ray Detection

“…[8] Besides,t he large X-ray attenuation coefficient (a), closely related to the average atomic number (Z)o fm aterials,w ill also promote the collection of charge carriers induced by X-ray irradiation. Them aterial that enables X-ray photoconduction should satisfy strict prerequisites,i ncluding high resistivity to suppress the electronic noise and dark current, large carrier mt product for efficient charge collection, and large absorptivity of high-energy X-ray photons by high atomic number elements.Inparticular,alarge carrier mt product is of extreme significance to the effective collection of charge carriers.T his figure-of-merit determines the fundamental capability of charge carriers that can transport per unit electric field before annihilation under ag iven applied bias.…”