Advancements in Solid-Liquid Nanogenerators: A Comprehensive Review and Future Prospects.

In recent years, the advent of the smart era has confronted a novel "energy crisis"-the challenge of distributed energy provision, necessitating an imperative for clean energy development. Encompassing 71% of the Earth's surface, water stands as the predominant conduit for energy transfer on our planet, effectively harnessing a fraction thereof to fulfill global energy demands. Modern hydropower technology primarily harnesses concentrated low-entropy water energy.

Improving the Surface Oxygen Vacancy Concentration of BiO through the Pretreatment of the NaBiO·2HO Precursor as a High-Performance Visible Light Photocatalyst.

The oxygen-deficient bismuth oxide, BiO, synthesized by a typical hydrothermal method using commercial NaBiO·2HO as a raw material only has a relatively low concentration of surface oxygen vacancies (OVs). How to improve the visible light photocatalytic performance of BiO via tuning its surface OV concentration is still a huge challenge. In this study, improving the surface OVs of BiO was successfully realized through the pretreatment of commercial NaBiO·2HO, including thermal treatment in air and hydrothermal treatment in 10 M NaOH solution, forming NaBiO·HO intermediate products first, and then hydrothermal preparation of BiO target products using NaBiO·HO instead of commercial NaBiO·2HO as the precursor.

An Energy Harvester Coupled with a Triboelectric Mechanism and Electrostatic Mechanism for Biomechanical Energy Harvesting.

Energy-harvesting devices based on a single energy conversion mechanism generally have a low output and low conversion efficiency. To solve this problem, an energy harvester coupled with a triboelectric mechanism and electrostatic mechanism for biomechanical energy harvesting is presented. The output performances of the device coupled with a triboelectric mechanism and electrostatic mechanism were systematically studied through principle analysis, simulation, and experimental demonstration.

Design on a Novel Titanium Dioxide Irregularly Distributed Bragg Reflector for Thin Film Silicon Solar Cells.

Titanium dioxide, which leads an excellent optical performance, is proposed to design irregularly distributed Bragg reflector (IDBR) through theoretical simulation as well as experimental verification. Firstly, a primary distributed Bragg reflector (DBR) model with the titanium dioxide serving as low reflection layer in, and amorphous silicon as high reflection layer is analyzed. The titanium dioxide DBR shows much enhanced reflection bandwidth relative to the DBR with silicon dioxide.

Inverted Planar Perovskite Solar Cells Based on NiO Nano Film with Enhanced Efficiency and Stability.

The organometal halide perovskite (OHP) materials have attracted much attention throughout the world due to their superb optoelectronic properties. Tremendous progress has been made in the OHP based solar cells with increased efficiency from 3.8% to 24.

An Accurate and Efficient Time Delay Estimation Method of Ultra-High Frequency Signals for Partial Discharge Localization in Substations.

Partial discharge (PD) localization in substations based on the ultra-high frequency (UHF) method can be used to efficiently assess insulation conditions. Localization accuracy is affected by the accuracy of the time delay (TD) estimation, which is critical for PD localization in substations. A review of existing TD estimation methods indicates that there is a need to develop methods that are both accurate and computationally efficient.