Red phosphor materials play a key role in improving the lighting and backlit display quality of phosphor-converted white light-emitting diodes (pc-WLEDs). However, development red with simultaneous high efficiency, excellent thermal stability colour purity is still challenge. In this work, unique non-concentration quenching solid-solution Cs3Gd1 - xGe3O9:xEu3+ (CGGO:xEu3+) (x = 0.1-1.0) phosphors successfully developed to achieve highly efficient red-emitting Cs3EuGe3O9 (CEGO) phosphor....

Abstract Bismuth ion is an excellent activator and sensitizer for luminescent materials, which has been extensively studied during the recent decades. Bi 3+ ‐doped phosphors have received considerable attention their abundant emission colors covering whole visible light region under ultraviolet (UV) near (n‐UV) excitation, in flexible crystal structures. These phosphor materials demonstrated potential applications solid‐state lighting, display, biomedical, optical sensing. Herein, advances...

Near-infrared (NIR) fluorescence imaging technique is garnering increasing research attention due to various advantages. However, most NIR fluorescent probes still suffer from a false signals problem owing their instability in real application. Especially pathological environment, many can be easily destroyed the excessive generation of highly reactive species and causing distorted signal. Herein, we proposed an approach for developing new stable dye platform with optically tunable group...

Abstract Near‐infrared (NIR)‐emitting phosphor materials have been extensively developed for optoelectronic and biomedical applications. Although Cr 3+ ‐activated phosphors widely reported, it is challenging to achieve ultra‐broad tunable NIR emission. Here, a new ultra‐broadband NIR‐emitting LiIn 2 SbO 6 :Cr with emission peak at 965 nm full‐width half maximum of 217 reported. Controllable tuning from 892 achieved by chemical unit cosubstitution [Zn 2+ –Zn ] [Li + –In ], which can be...

Recently, there has been growing interest in developing Bi3+-activated luminescence materials for optoelectronic applications. Herein, new yellow/orange-emitting ABZn2Ga2O7:Bi3+ (ABZGO, A = Ca, Sr; B Ba, Sr) phosphors with tunable optical properties are synthesized by an alkaline earth cation substitution. When Sr2+ substitutes Ca2+ and Ba2+, the excitation wavelength a red shift from 325 to 363 nm, matching well n-UV chip based white light-emitting diodes (WLEDs). CaBaZn2Ga2O7:0.01Bi3+...

Near-infrared (NIR)-emitting phosphor-converted light-emitting diodes have attracted widespread attention in various applications based on NIR spectroscopy. Except for typical Cr3+-activated NIR-emitting phosphors, next-generation Cr3+-free phosphors with high efficiency and tunable optical properties are highly desired to enrich the types of luminescent materials different application fields. Here, we report Fe3+-activated Sr2-yCay(InSb)1-zSn2zO6 that exhibit unprecedented long-wavelength...

Abstract Development of chromium‐doped luminescent materials is pertinent to many emerging applications, ranging from agriculture, food industry noninvasive health monitoring. The fundamental importance chromium‐activated in the field optics and biomedicine makes rapid development novel relevant applications. Herein, recent advances on luminescence principle photoluminescence (PL) optimization for Cr 3+ ‐activated together with their potential applications are reviewed. different types most...

Achievement of high photoluminescence quantum efficiency and thermal stability is challenging for near-infrared (NIR)-emitting phosphors. Here, we designed a "kill two birds with one stone" strategy to simultaneously improve the NIR-emitting Ca3Y2-2x(ZnZr)xGe3O12:Cr garnet system by chemical unit cosubstitution, revealed universal structure-property relationship luminescence optimization mechanism. The cosubstitution [Zn2+-Zr4+] [Y3+-Y3+] played critical role as reductant promote valence...

Abstract Highly efficient luminescence material covering near‐infrared (NIR) I (700–1000 nm) and II (1000–1700 is of great importance for phosphor‐converted NIR light‐emitting diodes (pc‐LEDs) light sources. The lack ultra‐wide emission luminescent materials that can be excited by cheap blue‐LEDs, suspends the applications pc‐LEDs. Ni 2+ ‐activated phosphor usually gives an NIR‐II region emission, however, it presents low quantum efficiency due to poor absorption in blue region. Here, a...

Abstract Near‐infrared (NIR) luminescent metal halide (LMH) materials have attracted great attention in various optoelectronic applications due to their low‐temperature solution‐processable synthesis, abundant crystallographic/electronic structures, and unique properties. However, some challenges still remain luminescence design, performance improvement, application assignments. This review systematically summarizes the development of NIR LMHs through classifying origins into four major...

Abstract Highly efficient cyan‐emitting phosphor materials are indispensable for closing the cyan gap in spectra of traditional phosphor‐converted white light‐emitting diodes (WLEDs) to achieve high‐quality full‐spectrum lighting. In this work, bright Ca 3 Ga 4 O 9 (CGO):0.02Bi 3+ ,0.07Zn 2+ is developed bridge gap. Such a Bi ,Zn codoping enhances emission CGO:0.02Bi by 4.1 times due influence morphology and size particles, charge compensation lattice distortion. Interestingly, La ions into...

NIR emission from 650 nm to 1100 in a novel Ca₂YHf₂Al₃O₁₂:Cr³⁺,Yb³⁺ garnet phosphor with good thermal stability and high internal quantum efficiency is designed for pc-LEDs.

Abstract Achieving ultra‐broadband and tunable photoluminescence of near‐infrared (NIR) emitting phosphors is a key challenge for realizing its multi‐applications. Here, series new ABO 4 :Cr 3+` (A 3+ = Ga, Sc, In; B 5+ Ta, Nb) NIR‐emitting with unprecedented based on crystallographic site engineering crystal field regulation reported. Large spectral tuning from NIR‐I to NIR‐II realized the peak position varying 825 1025 nm, by cation substitution decreasing strength. Broadened full‐width at...

Controllable emission tuning from bluish-green to red was achieved by Ba²⁺/Sr²⁺substitution and Bi³⁺→ Eu³⁺energy transfer.

Controllable cyan-to-orange tuning and optical thermometry in Ba_1+xSr_1−xGa₄O₈:Bi³⁺ phosphors with ultra-broadband emission were realized based on crystal filed control at multiple centers.

Abstract Lead‐free halide double perovskites are currently gaining significant attention owing to their exceptional environmental friendliness, structural adjustability as well self‐trapped exciton emission. However, stable and efficient perovskite with multimode luminescence tunable spectra still urgently needed for multifunctional photoelectric application. Herein, holmium based cryolite materials (Cs 2 NaHoCl 6 ) anti‐thermal quenching photoluminescence were successfully synthesized. By...

Abstract Visible‐to‐near‐infrared (VIS‐NIR) luminescent materials are in great demand the field of non‐destructive testing such as component determination and hyperspectral imaging. Although Cr 3+ ‐activated phosphors widely reported, controllable tailoring ultra‐wide VIS‐NIR luminescence excited by blue light is still a challenge. The strategies cationic substitution energy transfers effective for adjusting phosphors. In this work, series ‐doped Sc‐based solid solution (Ba 3‐m Sr m Sc 4 O 9...

Phosphor-converted white-light-emitting diodes (pc-WLEDs) rely on combining a near-ultraviolet (n-UV) or blue chip with trichromatic and yellow-emitting phosphors. It is challenging to discover cyan-green-emitting (480-520 nm) phosphors for compensating the spectral gap producing full-spectrum white light. In this work, we successfully discovered two unprecedented bright cyan-green emitting Rb3RV2O8 (R = Y, Lu) that gives emission bands centered at 500 nm upon 362 n-UV light excitation....

Abstract Recently, an optical thermometer based on the dual‐emitting fluorescent intensity ratio (FIR) in visible light (VIS) region has achieved great development. However, there is very little progress thermometers from NIR light. In this work, a novel highly efficient dual‐emission of Cr 3+ and Ni 2+ LaZnGa 11 O 19 (LZG) with magnetoplumbite structure designed. Utilizing energy transfer to , shows wide coverage 650–1600 nm region, covering I II windows, respectively. The as‐reported...