High performance direct current-generating triboelectric nanogenerators based on tribovoltaic p-n junction with ChCl-passivated CsFAMA perovskite

Ultrafast self-powered CsPbCl3ultraviolet photodetectors with choline chloride for surface passivation and charge transport regulation

“…As a consequence, the Pb–Cl antisite defect and uncoordinated Pb 2+ on the surface can get effectively passivated. 42 The downward shift of the binding energies of the ChCl-modified film also confirms the n-type transition of CsPbCl 3 with a reduced work function, which is consistent with the UPS analysis (Fig. 2b).…”

“…1b. 42 The positively charged alkyl amine ions can accept lone pair electrons and interact with Cl À , helping reduce the Pb-Cl antisite substitution defects. The negatively charged Cl À can interact with the uncoordinated Pb 2+ ions, conducive to suppressing the intrinsic chloride vacancy defects.…”

Dynamic Perovskite Homojunction Based Light‐Assisted, Direct Current Tribovoltaic Nanogenerators

“…This indicates that the separated interfacial electrons/holes can be effectively extracted by N-MAPbI 3 (or P-MAPbI 3 ) films, which is necessary to further suppress charge recombination loss and improve device performance. [41] Figure S7, Supporting Information shows the corresponding energy band alignment diagram of MAPbI 3 homojunction. When the N-MAPbI 3 connects with P-MAPbI 3 at the static stage, the large work function difference of two electrodes would promote the redistribution of interfacial nonequilibrium carrier, giving birth to a depletion layer at interface of homojunction.…”

Ferroelectric Modulation in Flexible Lead‐Free Perovskite Schottky Direct‐Current Nanogenerator for Capsule‐Like Magnetic Suspension Sensor

“…(DF-CBA) 2 CuCl 4 perovskite exhibits unique multiaxial ferroelectricity and low coercive field, so the polarization in the random grains of perovskite film can be tuned more easily among multiple directions, achieving better macroscopic polarization modulation in comparison to most uniaxial ferroelectrics. [51] Considering the excellent ferroelectric polarization, the surface charge and work function of (DF-CBA) 2 CuCl 4 can be easily regulated via the external poling process, which enables (DF-CBA) 2 CuCl 4 a higher work function difference with Al electrodes compared to conventional semiconductors [18,26,[52][53][54][55][56][57][58] and other halide perovskites, [27,[59][60][61] thereby establishing a stronger built-in electric field at the Schottky interface. After optimization of the electric poling field, the maximum current output can be enhanced from 6 to 93 μA when the electric poling field is changed from −30 to +30 kV cm −1 , realizing over 15-fold performance improvement.…”