| 초록 |
To date, the indirect‐type X‐ray detectors have widely been used in the common flat panel X‐ray detectors consisted of a scintillator and a Si‐PD array because they are much cheaper and more stable than the direct‐type detectors. Here, we demonstrated commercializable and cost‐effective next‐generation CsPbBr3 perovskite nanocrystals (PNCs) based X‐ray detectors. The PNCs‐based X‐ray detector exhibits higher spatial resolution (9.8 lp mm−1 at modulation transfer function (MTF) = 0.2 and 12.5–8.9 lp mm−1 for a linear line chart), faster response time (≈200 ns), and comparable stability (＞40 Gyair s−1 of X‐ray exposure) compared with the commercialized terbium‐doped gadolinium oxysulfide (GOS)‐based detectors (spatial resolution = 6.2 lp mm−1 at MTF = 0.2 and 6.3 lp mm−1 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. |
