Sensitivity and Detection Limit of Spectroscopic-Grade Perovskite CsPbBr3 Crystal for Hard X-Ray Detection
Journal Article
·
· Advanced Functional Materials
- Northwestern University, Evanston, IL (United States)
- Argonne National Lab. (ANL), Argonne, IL (United States)
We report spectroscopic-grade single crystal detectors can register the energies of individual X-ray interactions enabling photon-counting systems with superior resolution over traditional photoconductive X-ray detection systems. Current technical challenges have limited the preparation of perovskite semiconductors for energy-discrimination X-ray photon-counting detection. Here, this work reports the deployment of a spectroscopic-grade CsPbBr3 Schottky detector under reverse bias for continuum hard X-ray detection in both the photocurrent and spectroscopic schemes. High surface barriers of approximate to ≈ 1 eV are formed by depositing solid bismuth and gold contacts. The spectroscopic response under a hard X-ray source is assessed in resolving the characteristic X-ray peak. The methodology in enhancing X-ray sensitivity by controlling the X-ray energies and flux, and voltage, is described. The X-ray sensitivity varies between a few tens to over 8000 μC Gyair-1 cm-2. The detectable dose rate of the CsPbBr3 detectors is as low as 0.02 nGyair s-1 in the energy discrimination configuration. Finally, the unbiased CsPbBr3 device forms a spontaneous contact potential difference of about 0.7 V enabling high quality of the CsPbBr3 single crystals to operate in "passive" self-powered X-ray detection mode and the X-ray sensitivity is estimated as 14 μC Gyair-1 cm-2. The great potential of spectroscopic-grade CsPbBr3 devices for X-ray photon-counting systems is anticipated in this work.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- Defense Threat Reduction Agency (DTRA); National Science Foundation (NSF); USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- AC02-06CH11357
- OSTI ID:
- 1873520
- Alternate ID(s):
- OSTI ID: 1854265
OSTI ID: 23159547
- Journal Information:
- Advanced Functional Materials, Journal Name: Advanced Functional Materials Journal Issue: 24 Vol. 32; ISSN 1616-301X
- Publisher:
- WileyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Similar Records
Ultrahigh‐Flux X‐ray Detection by a Solution‐Grown Perovskite CsPbBr
3
Single‐Crystal Semiconductor Detector
Perovskite CsPbBr3 Single-Crystal Detector Operating at 1010 Photons s-1 mm-2 for Ultra-High Flux X-ray Detection
Journal Article
·
Fri Apr 28 20:00:00 EDT 2023
· Advanced Materials
·
OSTI ID:1971953
Perovskite CsPbBr3 Single-Crystal Detector Operating at 1010 Photons s-1 mm-2 for Ultra-High Flux X-ray Detection
Journal Article
·
Sat Jan 28 19:00:00 EST 2023
· Advanced Optical Materials
·
OSTI ID:1969744