论文标题
光依赖性的阻抗光谱和瞬时光电导率在ruddlesden-popper 2d铅甲基钙钛矿中，通过电扫描的探针显微镜和随附理论揭示了
Light-dependent Impedance Spectra and Transient Photoconductivity in a Ruddlesden-Popper 2D Lead-halide Perovskite Revealed by Electrical Scanned Probe Microscopy and Accompanying Theory
论文作者
论文摘要
电力显微镜用于记录光依赖性的阻抗谱和探针瞬时碘化物的膜的探针瞬态光电导率，ba $ _ {2} $ pbi $ _ {4} $，一个2D RuddlesdeL-popper Perovskite perovskite perovskite semiconductor。 Ba $ _ {2} $ pbi $ _ {4} $的阻抗谱显示出适度的变化，因为在相似条件下，相对巨大的变化，相对巨大的变化，照明强度的变化高达1400 mW/cm $^{2} $。 BA$_{2}$PbI$_{4}$'s light-induced conductivity had a rise time and decay time of $\sim$ 100 $μ$s, 10$^{4}$ slower than expected from direct electron-hole recombination and yet 10$^{5}$ faster than the conductivity-recovery times recently observed in 3D lead-halide perovskites and attributed to the relaxation光生的空缺。通过电力显微镜测量探测了哪些样品特性仍然是一个空旷的问题。 Dwyer，Harrell和Marohn最近引入了对电力显微镜实验的拉格朗日力学处理，这使得根据复杂的样品阻抗，可以计算稳态电力显微镜信号。在这里，通过引入时间依赖性的转移函数，扩展了对尖端样本相互作用的阻抗处理，以包括时间分辨的电扫描探针测量。结果表明，相位踢电力显微镜实验中的信号，因此可以根据样品的时间依赖性电阻（即电导率）明确地写入时分辨静电力显微镜实验中的信号。
Electric force microscopy was used to record the light-dependent impedance spectrum and the probe transient photoconductivity of a film of butylammonium lead iodide, BA$_{2}$PbI$_{4}$, a 2D Ruddlesden--Popper perovskite semiconductor. The impedance spectrum of BA$_{2}$PbI$_{4}$ showed modest changes as the illumination intensity was varied up to 1400 mW/cm$^{2}$, in contrast with the comparatively dramatic changes seen for 3D lead-halide perovskites under similar conditions. BA$_{2}$PbI$_{4}$'s light-induced conductivity had a rise time and decay time of $\sim$ 100 $μ$s, 10$^{4}$ slower than expected from direct electron-hole recombination and yet 10$^{5}$ faster than the conductivity-recovery times recently observed in 3D lead-halide perovskites and attributed to the relaxation of photogenerated vacancies. What sample properties are probed by electric force microscope measurements remains an open question. A Lagrangian-mechanics treatment of the electric force microscope experiment was recently introduced by Dwyer, Harrell, and Marohn which enabled the calculation of steady-state electric force microscope signals in terms of a complex sample impedance. Here this impedance treatment of the tip-sample interaction is extended, through the introduction of a time-dependent transfer function, to include time-resolved electrical scanned probe measurements. It is shown that the signal in a phase-kick electric force microscope experiment, and therefore also the signal in a time-resolved electrostatic force microscope experiment, can be written explicitly in terms of the sample's time-dependent resistance (i.e., conductivity).
