Journal
SCIENCE ADVANCES
Volume 6, Issue 15, Pages -Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/sciadv.aay0815
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Funding
- LDRD program [20180026DR]
- LANL J. R. Oppenheimer (JRO) Fellowship [20190613PRD1]
- DOE Office of Science [DE-AC02-06CH11357]
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Solid-state radiation detectors, using crystalline semiconductors to convert radiation photons to electrical charges, outperform other technologies with high detectivity and sensitivity. Here, we demonstrate a thin-film x-ray detector comprised with highly crystalline two-dimensional Ruddlesden-Popper phase layered perovskites fabricated in a fully depleted p-i-n architecture. It shows high diode resistivity of 10(12) ohm.cm in reverse-bias regime leading to a high x-ray detecting sensitivity up to 0.276 C Gy(air)(-1) cm(-3). Such high signal is collected by the built-in potential underpinning operation of primary photocurrent device with robust operation. The detectors generate substantial x-ray photon-induced open-circuit voltages that offer an alternative detecting mechanism. Our findings suggest a new generation of x-ray detectors based on low-cost layered perovskite thin films for future x-ray imaging technologies.
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