The Effect of Multi-Fields Synergy from Electric/Light/Thermal/Force Technologies on Photovoltaic Performance of BaBiNaTiO Ferroelectric Ceramics via the Mg/Co Substitution at A/B Sites.

Currently, it is widely reported that the photovoltaic effect in ferroelectric materials can be promoted by the application of a piezoelectric force, an external electric field, and intense light illumination. Here, a semiconducting ferroelectric composition is introduced, (1-x) BaBiNaTiO-xMgCoO (abbreviated as xMgCo, where x = 0.02-0.

Realizing an Ultrahigh Depolarization Temperature near the Curie Point and Large with Superior Temperature Stability in Lead-Free Ceramics via a Sandwich Structure Design.

An imminent challenge of lead-free BiNaTiO-based (BNT) piezoceramics is that the giant piezoelectric constant () caused by the morphotropic phase boundary is incompatible with a high depolarization temperature () and ultralow temperature coefficient () of the real-time , which severely hinders their industrial application in the field of elevated temperatures. Herein, a sandwich-structured 0.94BiNaTiO-0.

Enhanced Visible Photocatalytic Hydrogen Evolution of KN-Based Semiconducting Ferroelectrics Band-Gap Engineering and High-Field Poling.

In various ferroelectric-based photovoltaic materials after low-band-gap engineering, the process by which high-field polarization induces the depolarizing electric field () to accelerate the electron-hole pair separation in the visible light photocatalytic process is still a great challenge. Herein, a series of semiconducting KN-based ferroelectric catalytic materials with narrow multi-band gaps and high-field polarization capabilities are obtained through the Ba, Ni, and Bi co-doping strategy. Stable caused by high-field poling enhanced the visible photocatalytic hydrogen evolution in a 0.

Ultrahigh Energy Storage Density and Efficiency in BiNaTiO-Based Ceramics via the Domain and Bandgap Engineering.

Environmentally friendly lead-free dielectric ceramics have attracted wide attention because of their outstanding power density, rapid charge/dischargerate, and superior stability. Nevertheless, as a hot material in dielectric ceramic capacitors, the energy storage performance of NaBiTiO-based ceramics has been not satisfactory because of their higher remnant polarization value and low dielectric breakdown strength, which is a problem that must be urgently overcome. In this work, the (1 - ) (0.

Aqueous synthesis of composition-tuned defects in CuInSe nanocrystals for enhanced visible-light photocatalytic H evolution.

The composition and defect tolerance of CuInSe (CISe) quantum dots (QDs) provide a scaffold to design defects tailoring the elemental ratio or distributions for boosting photocatalytic H evolution (PHE). Herein, a ligand-assisted two-step aqueous method was developed to prepare defect CISe quantum dots for the first time. UV-vis, XPS, HRTEM, and HADDF investigations confirmed the typical double-absorption edges of copper vacancy defects and indium substituted at copper site defects in the structure constructed through initial synthesis tuned by Cu/In ratio and the ensued coarsening.

Crystal Structure and Ferroelectric Evidence of BaZnSi O , a Low-Permittivity Microwave Dielectric Ceramic.

BaZnSi O ceramic was prepared by the conventional solid-state method and sintered at 1100 °C. XRD and synchrotron Rietveld refinement analyses revealed the BaZnSi O ceramic presented a monoclinic structure with a space group of P2 /a (No.14), which is reported for the first time.

Dielectric and energy storage properties of BiO-BO-SiO doped BaCaZrTiO lead-free glass-ceramics.

A sol-gel method is employed for preparing high quality lead-free glass-ceramic samples (1 - )BCZT-BBS-incorporating BaCaZrTiO (BCZT) powder and BiO-BO-SiO (BBS) glass-doped additives with different values of ( = 0, 0.05, 0.1, 0.

Different Additives Doped Ca-Nd-Ti Microwave Dielectric Ceramics with Distorted Oxygen Octahedrons and High × Value.

We investigated the structure and antireduction of Ti in orthorhombic perovskite CaNdTiO (CNT) ceramic by doping with three different additives (CrO, MnO, and SnO). The X-ray diffraction patterns showed that the main phase of orthorhombic perovskite was formed in all the samples. In addition, the substitution of M (M = Cr, Mn, Sn) for Ti resulted in the oxygen octahedral distortion and changes of order degree of B-site, which was confirmed by Raman spectra.