Nonlinear optical materials are essential for the development of solid-state lasers. KBe2BO3F2 (KBBF) is a unique nonlinear material generation deep-ultraviolet coherent light; however, its industrial application limited. Here, we report new NH4B4O6F, which exhibits wide transparent range and suitable birefringence that enables frequency doubling below 200 nm. NH4B4O6F possesses large coefficients about 2.5 times KBBF. In addition, it easy to grow bulk crystals does not contain toxic elements.

Abstract The discovery of new nonlinear optical (NLO) materials for coherent light generation in the deep‐ultraviolet (DUV, wavelength below 200 nm) region is essential development laser technologies. Herein, we report a material CsB 4 O 6 F (CBF), which combines superior structural properties two well‐known NLO materials, β‐BaB 2 (BBO) and KBe BO 3 (KBBF). CBF exhibits excellent DUV including short cutoff edge (155 nm), large SHG response (≈1.9×KDP), suitable birefringence that enables...

Aerosol samples of PM2.5 and PM10 in a period intensive haze−fog (HF) events were collected to investigate the chemical characteristics air pollution Beijing. The quality HF episodes was much worse than that nonhaze−fog (NHF) days. concentrations elements water-soluble (WS) ions (K+, SO42-, NO3-) more 10 times higher those NHF Most species secondary (NH4+, showed significant difference between from westerly direction (HFW) southerly (HFS). HFS HFW, other lower HFW. sources areas on regional...

Abstract The development of new nonlinear optical (NLO) materials for deep‐ultraviolet (DUV) applications is in great demand. However, the synthesis an ideal DUV NLO crystal a serious challenge. Herein, three alkali‐metal fluorooxoborates, AB 4 O 6 F (A=K, Rb, and Cs, mixed cation between two them), were successfully synthesized by regulation. It found that all reported compounds exhibit short UV absorption edges (<190 nm), show second harmonic generation (SHG) responses ranging from 0.8...

Owing to their vital role in creating and controlling polarized light, birefringent materials are used extensively various advanced optical systems which turn impact a large, rapidly increasing range of applications science technology. Currently, the fairly small birefringence MgF2 low transmittance α-BaB2O4 (α-BBO) hinder efficient application for wavelength below 200 nm. For example, deep-ultraviolet (DUV) light polarization urgently needed DUV lithography. Here we demonstrate based on...

The search of new borates with improved functional properties has attracted considerable attention. Herein, a polar fluorooxoborate, NaB4 O6 F (NBF) was prepared by high-temperature solid-state reaction. NBF belongs to the AB4 family (A=alkali metal or ammonium), series compounds that undergoes significant cation-dependent structural changes. is particular interest owing special cation position. Temperature-dependent ionic conductivity measurements show solid conductor, and it lowest active...

LiCs2PO4, a new deep-ultraviolet (UV) transparent material, was synthesized by the flux method. The material contains unusual edge-sharing LiO4-PO4 tetrahedra. It exhibits very short absorption edge of λ = 174 nm and generates largest powder second harmonic generation (SHG) response for deep-UV phosphates that do not contain additional anionic groups, i.e., 2.6 times KH2PO4 (KDP). First-principles electronic structure analyses confirm experimental results suggest strong SHG may originate...

Abstract Recently, the discovery of organometallic halide perovskites provides promising routes for fabricating optoelectronic devices with low cost and high performance. Previous experimental studies MAPbI 3 devices, such as photodetectors solar cells, are normally based on polycrystalline films. In this work, a high-performance planar-type photodetector fabricated (100) facet single crystal is proposed. We demonstrate that can perform much better than polycrystalline-film counterpart. The...

The quest for high-efficiency heat-to-electricity conversion has been one of the major driving forces toward renewable energy production future. Efficient thermoelectric devices require high voltage generation from a temperature gradient and large electrical conductivity while maintaining low thermal conductivity. For given temperature, power factor is determined by electronic structure material. Low dimensionality (1D 2D) opens new routes to due unique density states (DOS) confined...

A chemical cosubstitution strategy was implemented to design potential ultraviolet (UV) and deep-UV nonlinear optical (NLO) materials. Taking the classic β-BaB2O4 as a maternal structure, by simultaneously replacing Ba2+ [B3O6]3– units with monovalant (K+), divalent (alkaline earth metal), trivalent (rare-earth metal, Bi3+) ions, [B5O10]5– clusters through two different practical routes, 12 new mixed-metal noncentrosymmetric borates K7MIIRE2(B5O10)3 (MII = Ca, Sr, Ba, K/RE0.5; RE Y, Lu, Gd)...

If a bucket is to hold more water, its shortest plank must be made longer. This guideline also applies the exploration of ultraviolet (UV) and deep-UV (DUV) nonlinear optical (NLO) materials that are limited by multiple criteria. Phosphates one kind promising candidate for new NLO materials. Unfortunately, small birefringence, as plank, severely restricts phase-matching second harmonic generation (SHG) in UV/DUV region. In this work, fluorophosphates rationally proposed substitutes...

Binary Sb2 Se3 semiconductors are promising as the absorber materials in inorganic chalcogenide compound photovoltaics due to their attractive anisotropic optoelectronic properties. However, solar cells suffer from complex and unconventional intrinsic defects low symmetry of quasi-1D crystal structure resulting a considerable voltage deficit, which limits ultimate power conversion efficiency (PCE). In this work, creation compact films with strong [00l] orientation, high crystallinity,...

Abstract The development of new nonlinear optical (NLO) materials for deep‐ultraviolet (DUV) applications is in great demand. However, the synthesis an ideal DUV NLO crystal a serious challenge. Herein, three alkali‐metal fluorooxoborates, AB 4 O 6 F (A=K, Rb, and Cs, mixed cation between two them), were successfully synthesized by regulation. It found that all reported compounds exhibit short UV absorption edges (<190 nm), show second harmonic generation (SHG) responses ranging from 0.8...

Abstract The discovery of new nonlinear optical (NLO) materials for coherent light generation in the deep‐ultraviolet (DUV, wavelength below 200 nm) region is essential development laser technologies. Herein, we report a material CsB 4 O 6 F (CBF), which combines superior structural properties two well‐known NLO materials, β‐BaB 2 (BBO) and KBe BO 3 (KBBF). CBF exhibits excellent DUV including short cutoff edge (155 nm), large SHG response (≈1.9×KDP), suitable birefringence that enables...

Abstract Wide‐bandgap (WBG) perovskite solar cells (PSCs) with high performance and stability are in considerable demand to boost tandem cell efficiencies. Perovskite bandgap broadening results a barrier for enhancing the efficiency of PSCs phase segregation perovskite. In this study, it is shown that residual strain key factor affecting WBG device stability. The dimethyl sulfoxide addition helps lead halide opening layer spacing form intermediate phases provide more nucleation sites...

Abstract The main obstacles to promoting the commercialization of perovskite solar cells (PSCs) include their record power conversion efficiency (PCE), which still remains below Shockley–Queisser limit, and poor long‐term stability, attributable crystallographic defects in films open‐circuit voltage ( V oc ) loss devices. In this study, potassium (4‐tert‐butoxycarbonylpiperazin‐1‐yl) methyl trifluoroborate (PTFBK) was employed as a multifunctional additive target modulate bulk carrier...

Abstract Combining π‐conjugated and non‐π‐conjugated groups is an important strategy for synthesizing new nonlinear optical (NLO) crystals. However, the second harmonic generation (SHG) response anisotropy can be limited by improper spatial alignment of these functional in crystal structure. In this work, it revealed that [NH 2 SO 3 ] group acts as both hydrogen bond donor acceptor, effectively regulating 2D planar structure formed [C 4 N H 6 groups. The resulting organic–inorganic hybrid C...

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotoluminescence and relaxation dynamics of cadmium sulfide superclusters in zeolitesYing Wang Norman HerronCite this: J. Phys. Chem. 1988, 92, 17, 4988–4994Publication Date (Print):August 1, 1988Publication History Published online1 May 2002Published inissue 1 August 1988https://pubs.acs.org/doi/10.1021/j100328a033https://doi.org/10.1021/j100328a033research-articleACS PublicationsRequest reuse permissionsArticle...

1.8 -μm-(Pb0.97La0.02)(Zr0.95−xSnxTi0.05)O3 antiferroelectric thick films with orthorhombic (x = 0.05 and 0.25) tetragonal 0.40) structure were deposited on platinum-buffered silicon substrates by using a chemical solution way. All the had uniform microstructure pure perovskite phase. With increasing x value, dielectric constant critical electric breakdown field of gradually increased, while their saturated polarizations decreased. As result, maximum recoverable energy-storage density was...

Elevated ground-level ozone (O3), which is an important aspect of air quality related to public health, has been causing increasing concern. This study investigated the spatiotemporal distribution O3 concentrations in China using a dataset from Chinese national monitoring network during 2013-2015. research analyzed diurnal, monthly and yearly variation both sparsely densely populated regions. In particular, 6 major cities were selected allow discussion variations levels detail, Beijing,...