Local structure modification in solid solution is an essential part of photoluminescence tuning rare earth doped state phosphors. Herein we report a new phosphor Eu2+-doped xSr2Ca(PO4)2–(1 – x)Ca10Li(PO4)7 (0 ≤ x 1), which share the same β-Ca3(PO4)2 type full composition range. Depending on parameter variation x)Ca10Li(PO4)7:Eu2+, vacancies generated M(4) site enable nonlinear cell parameters and volume, this increases magnitude M(4)O6 polyhedra distortion. The local modulation around Eu2+...

Abstract Halide perovskites are an emerging scintillator material for X‐ray imaging. High‐quality imaging generally requires high spatial resolution and long operation lifetime, especially targeted objects with irregular shapes. Herein, a perovskite “polymer–ceramics ” scintillator, in which the halide nanocrystals grown inside pre‐solidified polymer structure viscosity (6 × 10 12 cP), is designed to construct flexible refreshable A nucleation inhibition strategy proposed prevent...

The carrier lifetime is one of the key parameters for perovskite solar cells (PSCs). However, it still a great challenge to achieve long lifetimes in films that are comparable with crystals owning large trap density resulting from unavoidable defects grain boundaries and surfaces. Here, by regulating electronic structure developed 2-thiopheneformamidinium bromide (ThFABr) combined unique film 2D layer caped 2D/3D polycrystalline film, an ultralong exceeding 20 µs diffusion lengths longer...

Constructing low-dimensional/three-dimensional (LD/3D) perovskite solar cells can improve efficiency and stability. However, the design selection of LD capping materials are incredibly scarce for inverted (PSCs) because layers often favor hole extraction impede electron extraction. Here, we develop a facile effective strategy to modify surface by passivating defects modulating electrical properties incorporating morpholine hydriodide (MORI) thiomorpholine (SMORI) on surface. Compared with PI...

In this study, the fundamental but previously overlooked factors of charge generation efficiency and light extraction (LEE) are explored collaboratively optimized in tandem quantum-dot light-emitting diodes (QLEDs). By spontaneously forming a microstructured interface, bulk-heterojunction-like charge-generation layer composed poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate)/ZnO bilayer is fabricated an ideal surpassing 115% obtained. The coupling strength waveguide mode for top unit...

Manganese/nickel-based layered transition metal oxides have caught the attention of studies as promising cathodes for sodium-ion batteries (SIBs). It is reported that utilizing both cationic and anionic redox reactions a method higher energy density cathodes. However, reaction comes at expense irreversible oxygen release. Hence, Li-Mg cosubstituted P2-Na

Purpose The paper aims to help companies develop a better understanding of customer needs through quantitative analysis Kano's model. Design/methodology/approach A novel approach is developed measure and quantify the relationships between satisfaction fulfillment requirements (S‐CR) as depicted in case study concerning notebook computer design conducted illustrate application proposed approach. Findings By implementing approach, S‐CR relationship functions have been identified from model...

Upconverting materials have achieved great progress in recent years, however, it remains challenging for the mechanistic research on new upconversion strategy of lanthanides. Here, a novel and efficient to realize photon from more lanthanides fine control lanthanide donor-acceptor interactions through using interfacial energy transfer (IET) is reported. Unlike conventional energy-transfer recently reported energy-migration upconversion, IET approach capable enabling upconversions Er3+, Tm3+,...

An in-depth mechanistic investigation on self-sensitized upconversion (SSU) is presented, which would contribute much to both fundamental research and practical applications of lanthanide-based luminescent materials.

Core–shell structure is an obvious concept to suppress surface-related deactivations in lanthanide-doped upconversion nanoparticles (UCNPs). However, no direct observation of atomic-scale surface restoration, which can improve the photoluminescence, has been reported. Here, we use aberration-corrected high-angle annular dark field scanning transmission electron microscopy study condition KLu2F7:Yb3+,Er3+ bare core UCNPs. Due very thin and uniform thickness UCNPs, observe unambiguously that...

Abstract Photon upconversion multiplexing has attracted increasing interest in recent years; however, realizing the red color–based multicolor‐tunable output nanoparticles (UCNPs) at a fixed composition remains huge challenge. Here, novel and versatile approach to fine‐control luminescence (UCL) colors from UCNPs through selectively confining specific excitation energy by photon blocking effect is reported. Four types of dual‐color switchable capable emitting red‐blue red‐green emissions are...

Abstract Scintillators, as the core materials for X‐ray imaging, have received great attention in radiation detection, security inspection, and biomedical applications. However, current single crystal thin film scintillators encountered several issues, such high cost, insufficient stability, uneven distribution, which undoubtedly limit development of high‐quality imaging. Herein, Y 3 Al 5 O 12 :Ce 3+ (YAG:Ce ) transparent ceramics (TCs), presented a transmittance 82% steady‐state light yield...

The nonlinear optical (NLO) properties of two-dimensional (2D) materials are fascinating for fundamental physics and optoelectronic device development. However, relatively few investigations have been conducted to establish the combined NLO activities a 2D material. Herein, study numerous gallium sulfide (GaS), including second-harmonic generation (SHG), two-photon excited fluorescence (TPEF), absorption presented. layer-dependent SHG response GaS identifies noncentrosymmetric nature odd...

Direct laser patterning enables precise tailoring of perovskites at the microscale, which is vital importance to a variety advanced optoelectronic devices. However, thermal ablation triggered by nonlinear absorption could cause imprecise crystallization, significantly limits resolution technique. Here, perovskite nanoparticles (NPs) are crystallized inside polyvinylidene difluoride (PVDF) matrix continuous wave (CW) illumination. The underlying crystallization NPs fundamentally photon effect...

Pervasive mechanical force in nature and human activities is closely related to intriguing physics widespread applications. However, describing stress distribution timely precisely three dimensions avoid "groping the dark" still a formidable challenge, especially for nonplanar structures. Herein, we realize three-dimensional (3D) imaging sharp arbitrary targets via advanced 3D printing, owing use of fluoride nanocrystal(NC)-based ink. Notably, fascinating mechano-luminescence (ML) observed...

X-ray radiation information storage, characterized by its ability to detect with delayed readings, shows great promise in enabling reliable and readily accessible imaging dosimetry situations where conventional detectors may not be feasible. However, the lack of specific strategies enhance memory capability dramatically hampers further development. Here, we present an effective anion substitution strategy storage NaLuF4:Tb3+ nanocrystals attributed increased concentration trapping centers...

The precise patterning of elastic semiconductors holds encouraging prospects for unlocking functionalities and broadening the scope optoelectronic applications. Here, perovskite films with notable elasticity capable stretching over 250% are successfully fabricated by using a continuous-wave (CW) laser-patterning technique. Under CW laser irradiation, nanoparticles (NPs) undergo meticulous crystallization within thermoplastic polyurethane (TPU) matrix, which yields capability an unparalleled...

We report the synthesis and separation of colloidal indium tin oxide (ITO) nanocrystals in stable cubic bixbyite (bcc-ITO) metastable corundum (rh-ITO) phase under identical conditions, based on size−structure correlation. Both phases are obtained same reactions, with below ca. 5 nm size having crystal structure. This bimodal distribution allows for nanocrystal by selective precipitation. A comparative study bcc-ITO rh-ITO reveals a dramatic difference their optical electrical properties....

In this paper, we propose, analyze, and experimentally verify polarization-multiplexed optical wireless transmission with coherent detection as a means of improving performance increasing the per-wavelength data rate in presence atmospheric turbulence. It is first shown that terrestrial last-mile applications, polarization state changes signal are governed by source properties both absence mild to moderately severe Under these conditions, it evolution reduced rotation wherein...

We demonstrate simultaneous red, green, and blue emission from a Yb3+–Er3+–Tm3+ tridoped hexagonal β-NaYF4 microrod, which supports whispering-gallery-mode (WGM) resonance, to realize white-light lasing under near-infrared excitation at room temperature. This can be done by optimizing the upconversion efficiency intensity balance of blue, red peaks through proper tuning sensitizer (Yb3+) activator (Er3+, Tm3+) concentration in host matrix. In addition, we minimize difference threshold...

Abstract White lasers are promising illuminants for emerging visible light communication, which can overcome bottlenecks of lower energy conversion efficiencies and output powers in traditional white light‐emitting (WLE) diodes. However, optical gain materials suffering from great challenges material growth growth‐compatible cavity structure where lasing all three elementary colors be supported simultaneously. Here, an exquisite physical strategy is demonstrated to realize simultaneous red,...

Ni-rich layered LiNixMnyCozO2 (NMC) cathodes for lithium-ion batteries are receiving a lot of attention owing to their promising large capacity, whereas the high content Ni results in several issues including poor thermal stability and serious Li/Ni disorder. Although little degree disorder may be beneficial structural NMC even migration Li ions, certainly deteriorates electrochemical performances. Therefore, tuning is great interest development safer with larger accessible capacity....

Red-emitting nitride phosphors excited with blue light have great potential for the fabrication of warm white light-emitting diodes (WLEDs). Chemical composition and structural modification are generally adopted to optimize photoluminescence behaviors targeted phosphors. Herein, on basis famous CaAlSiN3 phosphors, Eu2+-doped (Ca1–xLix)(Al1–xSi1+x)N3 solid solutions via cations' cosubstitution (CaAl)5+ pair by (LiSi)5+ successfully synthesized a state reaction, lattice parameters show linear...