| 초록 |
To date, the indirect type Xray detectors have been widely used in the common flat panel X-ray detectors consisted ofa scintillator and a Si photodetector arrays because they are much cheaper and more stable than the direct type detectors. Here, we demonstrated superb CsPbBr3 perovskite nanocrystals (PNCs) based X-ray detectors with high spatial resolution at weak X-ray exposure and fast response time. The PNCs scintillator exhibited 5 fold shorter average photo-luminescent life time (5.28 ns) and better spatial resolution (9.8 lp mm-1 at MTF = 0.2 and 12.5-8.9 lp mm-1 for a linear line chart) than the conventional terbium-doped gadolinium oxysulfide (Gd2O2S, GOS) sample (15.99 ns for average life time, 6.2 lp mm-1 at MTF = 0.2 and 6.3 lp mm-1 for a linear line chart). The CsPbBr3 PNCs scintillator had comparable stability with the conventional GOS scintillator up to 40 Gyair s-1of X-ray exposure. |
