Suppression of Nonradiative Recombination by Vacuum‐Assisted Process for Efficient Lead‐Free Tin Perovskite Solar Cells

Suppression of nonradiative recombination and enhancement of carrier transport capability are achieved via vacuum‐assisted treatment of the FA0.75MA0.25SnI3 perovskite layer to self‐heal defects in bulk and at surface. As a result, lead‐free tin‐based perovskite solar cells have reached a high efficiency of 10.3% along with an improved V OC of 0.631 V...

15m

Amalgamation‐Assisted Control of Profile of Liquid Metal for the Fabrication of Microfluidic Mixer and Wearable Pressure Sensor

This paper presents a simple and straightforward amalgamation‐assisted method for creating liquid metal droplets and microdomes with highly controllable sizes. The microdome can generate the vortices, enhancing the flow mixing inside the microfluidic channel. Besides, the microdomes are patterned on the surface of stretchable conductive composites to...

5h

Macroporous Superhydrophobic Coatings with Switchable Wettability Enabled by Smart Shape Memory Polymers

Smart superhydrophobic coatings with switchable wettability and tunable optical properties have been developed by integrating shape memory polymers with templated macroporous photonic crystals. The thermoresponsive microstructural transitions between a “memorized” ordered configuration and a temporary deformed state enable easily perceived structural...

5h

Single Cell Trapping by Superhydrophobic/Superhydrophilic Microarrays

Superhydrophobic–superhydrophilic microarrays can trap single cells from a cell suspension with over 30% efficiency. The key parameter is the size of the hydrophilic spot which should be carefully matched to be about twice the size of the cells to be trapped. The superhydrophobic surface is completely cell‐repellent for short term exposure, so washing...

5h

Single Atom‐Based Nanoarchitectured Electrodes for High‐Performance Lithium–Sulfur Batteries

Introduction of single atom electrode materials into Li−S batteries not only improves the conversion kinetics of polysulfide, suppressing the notorious “shuttling effect,” but also promotes the efficiency of Li stripping/plating, preventing the growth of Li dendrites. Such enhancing effects of single atomic materials are noticeable on the Li−S batteries,...

5h

Hollow CeO2@Co2N Nanosheets Derived from Co‐ZIF‐L for Boosting the Oxygen Evolution Reaction

Hollow CeO2@Co2N nanosheets derived from Co‐ZIF‐L exhibit low overpotentials of 219 and 345 mV at oxygen evolution current densities of 10 and 100 mA cm–2, respectively, as well as a long‐term durability of 30 h at a current density of 100 mA cm−2. Abstract Rational design of highly active electrocatalysts for the oxygen evolution reaction...

5h

Bulk Passivation and Interfacial Passivation for Perovskite Solar Cells: Which One is More Effective?

In this article, the recent achievements on defects passivation for perovskite solar cells (PSCs) are summarized. Especially, the bottom interfacial passivation strategies for high‐performance PSCs are emphasized. At the same time, the effects of ion migration to the stability of perovskite device are summed up. Finally, the current challenges for the...

5h

Fast and Reversible Na Intercalation in Nsutite‐Type VO2 Hierarchitectures

A new‐state nsutite‐type VO2 (VO2(N)) anode with spindle‐like hierarchitectures is developed for sodium‐ion batteries. The VO2(N) constructed by the random intergrowth of rutile VO2(R) (superior structural stability) and paramontroseite VO2(P) (high electronic/ionic conductivity) has a significant structure superiority for sodium storage. As a result,...

5h

Lewis Acidity Organoboron‐Modified Li‐Rich Cathode Materials for High‐Performance Lithium‐Ion Batteries

A multiple surface modification strategy is proposed to improve the electrochemical performance of layered Li‐rich manganese‐based oxides (LLMO). The surface B3+‐doped LiMn2O4‐type spinel structure coated and (BO3)3−‐doped LLMO are realized through surface reaction induced by Lewis acidity material bis(catecholato)diboron. Consequently, the diffusion...

5h

Type‐II C2N/ZnTe Van Der Waals Heterostructure: A Promising Photocatalyst for Water Splitting

From the perspective of band structure, C2N/ZnTe heterostructure meets the requirements of photocatalytic water splitting. With light irradiation, the effective separation of excited electrons and holes is realized, and the reduction and oxidation reactions of water splitting can be carried out on the C2N layer and ZnTe layer, respectively. Therefore...

3d