Investigation on energy resolution of CsPbBr₃ detectors: from charge transport behavior to device configuration

Abstract

All-inorganic perovskite CsPbBr3 serving as an ionizing radiation material exhibits tremendous potential in many fields. However, the applications are limited by the poor energy resolution (ER), which is significantly associated...

Laminated Polymer‐Encapsulated Halide Perovskite Photoconductors

“…Also, in general, a higher applied field results in a faster response time for the de-vice due to a higher drift velocity. [36,37] Indeed, when measuring a 75 wt.% perovskite device where a lower field of 1.25 V μm −1 is applied the rise and fall time were increased to 12.2 and 55.9 ms, respectively.…”

Development of robust perovskite single crystal radiation detectors with high spectral resolution through synergetic trap deactivation and self‐healing

“…(G) ER at 59.5 keV and operating voltage comparison with different solution-processed perovskite radiation detectors reported previously. [14][15][16]18,[28][29][30][31] (H) Long-term atmospheric stability of the detectors characterized by recording the photocurrent variation with storage time.…”

“…In this article, we proposed a trap freezing strategy to deactivate the deep trap states in MAPbI 3 SCs at low temperatures, which suppresses the dark current and noise of the detectors by up to 97% and 92%, respectively. Furthermore, the bulk ion migration effect was demonstrated to be critical for the instant self-healing of radiation damage in MAPbI 3 SCs, thus ensuring that the detectors can be robustly operated with environmental temperatures down to À30 C. As a result, the detectors exhibited a record ER of 7.5% at 59.5 keV for the 241 Am γ-ray source; compared to the ER obtained for the best solution processed semiconductor radiation detectors at the same energy range, this ER is better, 18 which represents a considerable step toward the realization of high spectral resolution in solution-processed radiation detectors.…”

Single nucleation of Cl-doped FAPbBr3 with inhibited ion migration for ambipolar radiation detection

“…28–30 However, single carrier collection mode not only increases the difficulty of electrode preparation, but also inevitably sacrifices the charge collection efficiency. Zhang et al 31 reported the relationship between ( μτ ) e /( μτ ) h and energy resolution of CsPbBr 3 , finding that the superior energy resolution can be obtained when ( μτ ) e /( μτ ) h is close to 1, which means materials with dual charge collection can obtain the best energy resolution. For OIHP crystals, ( μτ ) e /( μτ ) h is always smaller than 1, 13 which may cause an asymmetric Gaussian shape for γ-ray full-energy peaks.…”