High‐Performance Next‐Generation Perovskite Nanocrystal Scintillator for Nondestructive X‐Ray Imaging

Abstract

Readily commercializable and cost-effective next-generation CsPbBr perovskite nanocrystals (PNCs) based X-ray detectors are demonstrated. The PNCs-based X-ray detector exhibits higher spatial resolution (9.8 lp mm at modulation transfer function (MTF) = 0.2 and 12.5-8.9 lp mm for a linear line chart), faster response time (≈200 ns), and comparable stability (>40 Gy s of X-ray exposure) compared with the commercialized terbium-doped gadolinium oxysulfide (GOS)-based detectors (spatial resolution = 6.2 lp mm at MTF = 0.2 and 6.3 lp mm for a linear line chart, response time = ≈1200 ns) because the PNCs-based scintillator has ≈5.6-fold faster average photoluminescence lifetime and stronger emission than the GOS-based one.

Inorganic, Organic, and Perovskite Halides with Nanotechnology for High–Light Yield X- and γ-ray Scintillators

“…We have shown the progress in the research of scintillators from the seventy-year-old earliest traditional scintillators, NaI:Tl + and CsI:Tl + [56], the first lanthanide-doped scintillators discovered in the late eighties, Ce 3+ , Pr 3+ , and Nd 3+ doped LaF 3 [93] and YAG [118], to the very recent perovskite scintillators [22,170,171]. Lanthanide-doped scintillators already offer excellent scintillation properties.…”

“…The perovskite scintillator prototype is then used to image the internal circuitry of an iPhone as shown in Figure 7m. Separately, Heo et al demonstrated that, compared to a commercial GOS : Tb detector, CsPbBr 3 nanocrystal scintillator exhibits higher ratio of light output power/absorptivity, faster response time, and higher spatial resolution [171]. All those results [170,171] are very promising for (nanocrystal) perovskite scintillators, showing that they have the potential to replace current scintillators as a low-cost, high yield alternative.…”

“…Separately, Heo et al demonstrated that, compared to a commercial GOS : Tb detector, CsPbBr 3 nanocrystal scintillator exhibits higher ratio of light output power/absorptivity, faster response time, and higher spatial resolution [171]. All those results [170,171] are very promising for (nanocrystal) perovskite scintillators, showing that they have the potential to replace current scintillators as a low-cost, high yield alternative. However, it remains a challenge to ensure if such design can fully prevent signal crosstalks, which currently was prevented by designing multicolumn scintillators flat panel detectors.…”

Self‐Powered X‐Ray Detector Based on All‐Inorganic Perovskite Thick Film with High Sensitivity Under Low Dose Rate

“…Zhou et al reported an Au/SnO 2 /CsPbBr 3 (11 µm)/spiro‐OMeTAD/ITO structure visible light detector which exhibited a responsivity of 0.172 A W −1 and a detectivity of 4.8 × 10 12 Jones and the on/off ratio up to 1.3 × 10 5 under illumination of 473 nm (100 mW). Chen et al and Heo et al take the CsPbBr 3 as a scintillator detector in X‐ray detection, respectively. However, there must be a loss of energy due to the mechanism of indirect X‐ray detector, thus reducing the sensitivity of the detector.…”

All-inorganic perovskite nanocrystal materials: new generation of scintillators for high quality X-ray imaging

“…Since the revolutionary discovery of novel nanocrystal scintillators by Liu and co-workers, advances of CsPbBr 3 PNCs based scintillators have been made in the last year. Im and co-workers [9] developed a CsPbBr 3 PNCs based X-ray detector with high-performance scintillating abilities. Zhang et al [10] reported the scintillating properties of easily accessible CsPbBr 3 nanosheets colloidal and solid film scintillators.…”