Ionic Field Screening in MAPbBr₃ Crystals Revealed from Remnant Sensitivity in X-ray Detection.

15 , 21 The impedance spectroscopy over time at SC (after pre-biasing) was measured within the framework of the IDD model 6 and shown for the single and the polycrystal samples in Figure 2 d,e, respectively. The high resistivity of the samples (slightly higher for the single crystal sample) results in noisy spectra, yet a decreasing trend can be extracted where the resistance transits from an initial value R t0 toward a saturation value R t∞ , which is typically 8 − 10 , 14 around 10% from the initial value, i.e., R t∞ / R t0 = α ∼ 0.1.

also in 47,180 other papers