Improved 3D-2D Perovskite for Efficient Perovskite Photovoltaics with Low-Temperature Carbon Electrodes.

Surface passivation and interface modification are effective strategies to acquire outstanding performances for perovskite solar cells (PeSCs). To suppress charge recombination and enhance the stability of the perovskite device, a hydrophobic two-dimensional (2D) perovskite is presented to construct a 3D-2D composite perovskite, passivating the perovskite surface/interfacial imperfection. Herein, a 3D-2D heterojunction perovskite is in situ synthesized on a 3D surface to maximize the charge transport and environmental stability.

MACl enhanced electron extraction in all-inorganic CsAgBiBr perovskite photovoltaics.

We present organic-halide treatment in advance to maximize electron extraction of CsAgBiBr double perovskite solar cells. Through optimizing the organic halide and concentration systematically, the best carbon-based CsAgBiBr perovskite solar cell fabricated in an airing chamber achieves a power conversion efficiency of 2.03% and shows excellent long-term stability in air over 30 days.

A-Site Substitute for Fabricating All-Inorganic Perovskite CsPbCl with Application in Self-Powered Ultraviolet Photodetectors.

Because of its stable chemical properties and wide band gap, CsPbCl perovskite has shown great application prospects in ultraviolet photodetectors (UPDs). However, the poor solubility of CsCl in organic solvents impedes the fabrication of high-quality CsPbCl films. Herein, we introduced an A-site substitute route for fabricating a high-quality CsPbCl microcrystalline (MC) film by spin-coating cesium acetate on a MAPbCl MC film followed by a high-temperature annealing process.

Oxygen-Defect Enhanced Anion Adsorption Energy Toward Super-Rate and Durable Cathode for Ni-Zn Batteries.

The alkaline zinc-based batteries with high energy density are becoming a research hotspot. However, the poor cycle stability and low-rate performance limit their wide application. Herein, ultra-thin CoNiO nanosheet with rich oxygen defects anchored on the vertically arranged Ni nanotube arrays (O-CNO@Ni NTs) is used as a positive material for rechargeable alkaline Ni-Zn batteries.

Synthesis of hollow ZnO microspheres by an integrated autoclave and pyrolysis process.

Hollow zinc oxide microspheres have been synthesized from a micro ZnBr2·2H2O precursor obtained by an autoclave process in bromoform steam at 220 °C /2.5 MPa. Field-emission scanning electron microscropy (FE-SEM) and transmission electron microscopy (TEM) show that the products are about 1.