Abstract Broadband near‐infrared (NIR) phosphor‐converted light emitting diode (pc‐LED) is demanded for wearable biosensing devices, but it suffers from low efficiency and radiance. This study reports a broadband NIR Ca 3‐ x Lu Hf 2 Al 2+ Si 1− O 12 :Cr 3+ garnet phosphor with emission intensity enhanced by 81.5 times. Chemical unit co‐substitution of [Lu −Al ] [Ca −Si 4+ responsible the luminescence enhancement further alters crystal structure electronic properties garnet. Using optimized...

The garnet Ca₂LuZr₂Al₃O₁₂ (CLZA) is a promising broad-band NIR phosphor for blue LED chips when it doped with Cr³⁺.

Abstract Super broadband near‐infrared (NIR) phosphor converted light‐emitting diodes (pc‐LEDs) are future light sources in NIR spectroscopy applications such as food testing. At present, a few blue LED excitable super phosphors (bandwidth > 300 nm) have been developed producing the output powers below 26 mW at 100 mA input current after packaging. Here, an efficient achieved by doping Yb 3+ is reported Ca 2 LuZr Al 3 O 12 :Cr (CLZA:Cr ) garnet previously. Benefited from superposition of...

The requirement of energy-storage equipment needs to develop the lithium ion battery (LIB) with high electrochemical performance. surface modification commercial LiFePO4 (LFP) by utilizing zeolitic imidazolate frameworks-8 (ZIF-8) offers new possibilities for LFP performances. In this work, carbonized ZIF-8 (CZIF-8) was coated on particles in situ growth and carbonization ZIF-8. Transmission electron microscopy indicates that there is an approximate 10 nm coating layer metal zinc...

Abstract The rare earth Er 3+ and Yb codoped system is the most attractive for showcasing energy transfer upconversion. This can generate green red emissions from under infrared excitation of sensitizer . It well known that red-emitting state be populated upper green-emitting state. contribution multiphonon relaxation to this population generally considered important at low densities. Here, we demonstrate first time importance a previously proposed but neglected mechanism described as cross...

A new type of environmentally friendly phosphor based on carbon nanodots (CDs) has been developed through the dispersion CDs by integrating with starch particles. The particles contain large numbers hydroxyl groups around surfaces, which can effectively absorb CDs, whose surfaces are functionalized lots carboxyl and amide groups, hydrogen bonding. Effective suppress non-radiative decay processes photoluminescence (PL) quenching induced aggregation CDs. matrix neither competes for absorbing...

Abstract Developing high energy density lithium secondary batteries is pivotal for satisfying the increasing demand in advanced storage systems. Lithium metal (LMBs) have attracted growing attention due to their theoretical capacity, but dendrites issue severely fetter real‐world applications. It found that reducing anion migration near prolongs nucleation time of dendrites, meanwhile, promoting homogeneous deposition suppresses dendritic growth. Thus, regulating ion transport LMBs a...

Abstract Achieving a high Li + transference number is an effective strategy to inhibit the nucleation of lithium dendrites on metal anode according classical Sand's time principle. However, improving usually causes aloss ionic conductivity batteries. Here, inspired by biological ion channels tuning transport, electronegative nanochannels separator developed accelerate transport for enabling dendrite‐free and high‐rate anodes. Benefiting from selective fast can simultaneously achieve (0.77)...

A series of single-phase full-color emitting BaMg(2)Al(6)Si(9)O(30):Eu(2+), Tb(3+), Mn(2+) phosphors has been synthesized by solid-state reaction. Energy transfer from Eu(2+) to Tb(3+) and in BaMg(2)Al(6)Si(9)O(30) host matrix is studied luminescence spectra energy-transfer efficiency lifetimes. The wavelength-tunable white light can be realized coupling the emission bands centered at 450, 542, 610 nm ascribed contribution Mn(2+), respectively. By properly tuning relative composition...

The α-Ca2P2O7:Eu2+, Mn2+ phosphors show two emission bands peaking at around 416 (blue) and 600nm (orange), originating from the allowed f-d transition of Eu2+ forbidden T14-A16 Mn2+, respectively, under near ultraviolet (UV) excitation 400nm. Spectroscopy fluorescence lifetime measurements demonstrate that energy transfer to performs with efficiency as high 65% for concentration 12mol%. authors have fabricated a white light emitting diode (LED) through integration GaN near-UV chip phosphor...

Novel blue-emitting K2Al2B2O7:Eu2+ (KAB:Eu2+) phosphor was synthesized by solid state reaction. The crystal structural and photoluminescence (PL) properties of KAB:Eu2+ phosphor, as well its thermal the photoluminescence, were investigated. exhibits broad excitation spectra ranging from 230 to 420 nm, an intense asymmetric blue emission band centered at 450 nm under λex = 325 nm. Two different Eu2+ centers in confirmed via their fluorescence decay lifetimes. optimal concentration ions...

Bright red upconversion phosphor Ba₃Y₄O₉:Er³⁺/Yb³⁺ and dual-color complementary optical thermometry to maintain relatively high sensitivities over a wide temperature scope.

This paper demonstrates a highly thermally stable and efficient green-emitting Ba2Y5B5O17:Ce3+, Tb3+ phosphor prepared by high-temperature solid-state reaction. The exhibits blue emission band of Ce3+ green lines upon excitation in the near-UV spectral region. effect to energy transfer on color tuning luminescence thermal stability is studied samples codoped with 1% various concentrations (0-40%) Tb3+. at 150 °C can keep, average, 92% its intensity room temperature, best one showing no...

Broadband near-infrared (NIR) phosphor-converted light-emitting diodes (pc-LEDs) are essential to integrate spectrometers into mobile devices for the rapid and noninvasive detection of biological components. However, efficient broadband NIR phosphors with a peak emission wavelength longer than 800 nm deficient. In this study, CaMgGe2O6:Cr3+ phosphor was prepared by high-temperature solid-state reaction. The doped 0.02Cr3+ showed an band at 845 broad bandwidth 160 high quantum yield 84% under...

Abstract Broadband near‐infrared (NIR) phosphor converted light emitting diodes (pc‐LEDs) are novel compact sources that enable portable devices for substance detection. However, to achieve such efficient pc‐LEDs is still a challenge due lack of phosphors. In this paper, Stokes shift as an efficiency predictor emphasized. Cr 3+ activated Ca 2 LuZr Al 3 O 12 (CLZA) garnet phosphor, decreases from 2990 2854 cm −1 upon substituting Ca‐Zr with Lu‐Al. As result, electron–phonon coupling related...

Abstract In conventional electron trapping optical storage phosphor, both short‐ and long‐wavelength light are needed for information write‐in read‐out, respectively, complicating the system. Here, a Y 3 Al 2 Ga O 12 :Pr 3+ ,Eu phosphor with Pr as an donor Eu trap is designed, single wavelength write‐read scheme demonstrated, which employs same blue laser diode (LD) source through two‐photon up‐conversion charging read‐out based on photostimulated luminescence (PSL), originated from 4 f 1 5...

Abstract Broadband near‐infrared (NIR) phosphor‐converted light‐emitting diodes are next‐generation smart NIR light sources. However, the phosphor suffers from serious thermal quenching (TQ), resulting in efficiency reduction and spectral shift. Here, a novel strategy is realized to suppress TQ by minimizing bond angle distortion, completely different conventional suppression approach through length variation. Li(Sr 1− x Ca )AlF 6 :Cr 3+ taken as an example which rotation between two...

Transparent phosphor ceramics have been received increasing attention for high-brightness laser lighting, but the commercially available are currently mainly limited to yellow YAG:Ce and green LuAG:Ce garnets, leaving a "cyan cavity" which is an obstacle realizing full-color lighting. Achieving new capable of filling cavity challenge. Herein, first time, cyan-green-emitting Ca₃Sc₂Si₃O₁₂:Ce³⁺ (CSS:Ce) transparent successfully developed by...

Abstract As novel stress‐sensing materials, the reported mechanoluminescence (ML) phosphors work only at or above room temperature. Herein, ML response to low temperatures (77 K) is extended by employing ultra‐shallow traps. Strong stimulated handwriting force followed persistent luminescence observed in BaSi 2 O N :Eu 2+ (BSON) 77 K. The UV pre‐irradiated BSON can still keep characteristics of with 45% intensity after 300 min. Abundant traps depth ≈0.19 eV are found and revealed be...

Abstract Deep traps are needed for electron‐trapping‐based long‐term optical storage due to its resistance thermal erasure. Current electron trapping materials have the erasing temperatures hardly beyond 600 K, limiting time. Herein, an material containing deep is achieved by co‐doping Tb and Eu in Y 3 Al 5 O 12 via solid‐state reaction reducing atmosphere. After 254 nm UV charging, strong thermoluminescence of 3+ with glow curve peaking at 600, 693, 765 K observed. The comparative studies...

Abstract Anode‐free rechargeable batteries (AFRBs), equipped with bare collectors at the anode, are potential electrochemical energy storage technology attributed to their simplified cell configuration, high density, and cost reduction. Nevertheless, issues including insufficient Coulombic efficiency as well formation of dendrites restrict practical implementation. In recent years, various strategies have been proposed overcome critical AFRBs. Among which, interfacial properties play key...

The extensive production of waste wool in the textile industry poses significant environmental challenges. To address this issue, we present a novel recycling approach that transforms into carbonized, porous, and C/N/O co-doped TiO 2 composite material. This was achieved through simple one-step hydrothermal synthesis followed by calcination either nitrogen or an air atmosphere. innovative method not only repurposes but also creates material with impressive adsorption photocatalytic...