Advanced Optical Materials
·
2022
·Vol. 11
·期 3
·2202323
·
IF 10.05
Chaojie Li,Jiyou Zhong
Near-infrared (NIR) spectroscopy based on phosphor-converted light-emitting-diode (pc-LED) has promising applications in food quality analysis, security monitoring, medical diagnosis, and bioimaging fields, stimulating the demand of developing NIR phosphors with high-performance. Herein, a highly efficient and thermally robust Ca 3 MgHfGe 3 O 12 :Cr 3+ NIR phosphor is discovered, which exhibits a broadband NIR emission (λ em = 800 nm) covering 700 to 1100 nm region with an internal quantum efficiency as high as 90.7% when excited by 460 nm blue light. Moreover, the emission intensity at 423 K retains 84.5% of that at room temperature. The highly efficient and thermally robust luminescence of this material is mainly ascribed to the ultrawide bandgap of host, extremely weak electron–photon coupling effect, defect-free, and highly structural rigidity. The NIR pc-LED device fabricated by using the optimized Ca 3 Mg 0.97 Hf 0.97 Ge 3 O 12 :0.06Cr 3+ phosphor combined with blue (λ em = 455 nm) LED chip produces an excellent NIR output power of 49.5 mW @ 11.5% under a driving current of 150 mA, which indicates a superiority to the device fabricated by using the well-known efficient ScBO 3 :Cr 3+ phosphor under the same condition. Therefore, this work not only provides a promising broadband NIR material, but also highlights the design rules for searching high-performance NIR materials toward spectroscopy applications.
研究领域:
材料科学
·
光电技术
·
光谱学
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DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2026
·
IF 5.2
Yurong Wei,Yuanyuan Zhang,Wanqing Yang,Lingling Qiu,JiaoJiao Ran,Fenju Qin,Guoliang Dai,Jie Wang
Core-shell spatial confinement breaks concentration quenching in ion doping. • A universal boosting strategy for NIR-to-NIR persistent luminescence. • Core-shell engineering achieves 6.5-fold enhancement of persistent luminescence. Near-infrared-to-near-infrared (NIR-to-NIR) persistent luminescence nanoparticles (PLNPs) hold great promise for biomedical applications, yet their practical use is severely limited by low persistent luminescence efficiency. In this study, we demonstrate that introducing traps via heavily doped ions, combined with spatial separation of luminescent centers (confined in the core) from heavily doped ions (confined in the shell), effectively enhances NIR-to-NIR persistent luminescence. Using ZnGa 2 O 4 :Cr (ZGO:Cr) as a model system exhibiting NIR-to-NIR upconversion persistent luminescence (UCPL), we synthesized co-doped ZnGa 2 O 4 :Cr,Eu (Cr Eu) and ZnGa 2 O 4 :Cr,Ca (Cr Ca) PLNPs. Both systems emitted persistent luminescence at 695 nm upon 700 nm excitation, with optimal enhancement observed at 0.7% Eu and 0.5% Ca, yielding 1.9- and 1.3-fold intensity increases relative to ZGO:Cr, respectively. To overcome the concentration quenching effect, we further designed core-shell structured ZnGa 2 O 4 :Cr@ZnGa 2 O 4 :Eu (Cr@Eu) and ZnGa 2 O 4 :Cr@ZnGa 2 O 4 :Ca (Cr@Ca) PLNPs, in which Cr 3+ luminescent centers are confined in the core while Eu 3+ or Ca 2+ ions are heavily doped in the shell. These core-shell PLNPs exhibited persistent luminescence at ∼695 nm after charging with 700 or 800 nm LED light, lasting over 30 min. Remarkably, the NIR-to-NIR persistent luminescence intensities of Cr@Eu and Cr@Ca reached 5.6 and 6.5 times that of ZGO:Cr, respectively, with optimal doping concentrations elevated to 3% and 5%. In in vivo bioimaging tests, Cr@Eu exhibited signal-to-background ratios over 3 times greater than that of ZGO:Cr. This work establishes a universal paradigm for enhancing NIR-to-NIR persistent luminescence in PLNPs, paving the way for their biomedical applications. Download: Download high-res image (113KB) Download: Download full-size image
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CARBOHYDRATE POLYMERS
·
2022
·
IF 10.723
Chongchong Liu,Panping Yang,Jingguo Li,Shaokui Cao,Jun Shi
Remotely multi-responsive chitosan (CS) hydrogels holds great promise in the design of anticancer drug carriers. In this paper, near-infrared (NIR)-/pH-dual responsive CS/β-GP/Ti 3 C 2 @AuNRs hybrid hydrogel was prepared based on CS/β-glycerol phosphate disodium salt (β-GP) crosslinking system embedded with NIR-responsive Ti 3 C 2 @gold nanorods (AuNRs) nanosheets . Excess β-GP promoted the formation of massive electronegative cavities, which endowed hybrid hydrogels with high drug loading efficiency for electropositive DOX (around 88.5 %). The collapse of chitosan network in acidic medium gave the hybrid hydrogel with distinct pH response. In addition, the distinct temperature increase owing to the strong NIR responsiveness of Ti 3 C 2 @AuNRs nanosheets would accelerate the DOX release dramatically. Therefore, NIR-, pH- and thermal-multi-responsiveness would synergistically endow CS/β-GP/Ti 3 C 2 @AuNRs hybrid hydrogel with notable NIR-triggered photothermal effect and remotely controllable drug delivery properties.
研究领域:
生物医学工程
·
纳米技术
·
药学
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DOI
PubMed
高影响因子
Laser & Photonics Reviews
·
2025
·
IF 10
Ziyi Niu,Pengfei Zhang,Wenbo Chen,Junyang Xia,Zhili Zhang,Jinwei Liu,Yanyan Li,Bitao Liu,Lei Zhao
Near-infrared (NIR) mechanoluminescence (ML) holds significant promise for in vivo biomechanical detection and imaging due to its self-powered excitation and self-recovery capabilities. However, its broader application remains constrained by the limited availability of suitable ML materials and the narrow spectral range of NIR emission. In this study, we report the Y 3 Ga 5 O 12 (YGO): Cr 3+ , Nd 3+ , Yb 3+ /polydimethylsiloxane (PDMS) NIR-ML composite with broadband NIR emission tunable from 600 to 1100 nm, covering both the NIR-I and NIR-II windows. The ML of composite device is driven by an interfacial triboelectric effect arising from the mechanical interaction between the inorganic particles and the polymer matrix. Comparative studies on photon penetration through biological tissues reveal that co-doping with Nd 3+ and Yb 3+ markedly enhances tissue penetration depth. Specifically, the luminescence decay rate in biological tissues is reduced by 20.8% relative to Cr 3+ single doping, indicating improved optical persistence and signal transmission. These findings demonstrate the potential of full-spectrum NIR-ML devices for high-resolution, deep-tissue biomechanical sensing and imaging. This work provides a generalizable design strategy for the development of broadband NIR-ML materials tailored for in vivo mechanical diagnostics.
研究领域:
材料科学
·
生物医学工程
·
光学成像
·
机械发光
·
体内传感
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产品关联
DOI
高影响因子
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
·
2023
·Vol. 26
·期 35
·e202300556
·
IF 2.3
Quwei Ni,Jiansheng Huo,Qijian Zhu,Jianbang Zhou,Wenjie Sun,Yutong Huang,Chenggang Long,Qianming Wang
Graphical The Ca3Sc2Ge3O12:Cr3+ NIR emission garnet phosphor exhibits broadband emission peaking at 817 nm with a FWHM value of 128 nm. The developed phosphor presents balanced comprehensive performance and is suitable for NIR-LED application. The rapid growth in phosphor-converted near-infrared light-emission diodes (NIR-LEDs) has led to the development of NIR emitter with high efficiency, broadband emission and high thermal stability. In this work, an efficient broad NIR emission of Cr 3+ in novel Ca 3 Sc 2 Ge 3 O 12 (CSGO) garnet-based host was developed for the first time, which located at 700 to 1000 nm peaking at 817 nm with a broad bandwidth of ~128 nm. Such a broadband NIR emission originated from the preferential occupancy of Cr 3+ in Sc 3+ sites with weak octahedral field, which was manifested by the luminescence spectrum and decay behaviors. The Cr 3+ -doping concentration was regulated to achieve a good internal quantum efficiency (IQE) of 72.1 % and a fantastic thermal stability (at 423 K, sustained approximately 85 % of the initial intensity). The mechanism for concentration and thermal quenching was further investigated. Benefiting from the excellent luminescence features, a prototype NIR-LEDs was assembled via integrating the optimized samples with commercial blue InGaN LED chips, which exhibited a satisfactory photoelectric property and a brilliant performance in night vision. These results demonstrated the as-obtained sample to be a great potential candidate for NIR-LEDs.
研究领域:
材料科学
·
光学工程
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产品关联
DOI
高影响因子
POWDER TECHNOLOGY
·
2020
·
IF 4.142
Yuchan Cao,Jun Shi,Zheng Wu,Jingguo Li,Shaokui Cao
In the present paper, hollow hydroxyapatite/polydopamine/gold nanorods (H-HAP/PDA/AuNRs) hybrid microcapsules was prepared for multi-responsive drug delivery via self-assembly method. PDA/AuNRs hybrid shell was employed to obstruct the initial burst drug release and endow the hybrid vehicle with superior photothermal conversion capacity, robust photothermal stability and brilliant near-infrared (NIR)-responsive delivery property. Moreover, due to the mesoporous structure of H-HAP as well as the strong mutual adsorption between PDA and drug, H-HAP/PDA/AuNRs exhibited excellent drug loading efficiency (95.6%). The drug release results demonstrated that the hybrid vehicle possessed distinct pH-/NIR- dual responsiveness, which due to the disintegration of HAP/PDA matrix in acid condition and the synergistically enhanced NIR responsiveness of PDA/AuNRs. Furthermore, cell viability results demonstrated that H-HAP/PDA/AuNRs exhibited outstanding biocompatibility and low bio-toxicity. Thus, the as-prepared H-HAP/PDA/AuNRs hybrid microcapsules hold great promise as novel smart drug carriers for remotely controllable drug delivery.
研究领域:
纳米技术
·
药学
·
生物医学工程
·
材料科学
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DOI
高影响因子
Laser & Photonics Reviews
·
2026
·
IF 9.7
Yuanheng Mu,Yun Ling,Tangkun Wang,Bin Sun,Nan Yang,Meng Zhang,Pengpeng Dai
Near-infrared (NIR) luminescence capable of covering NIR-I and NIR-II is highly promising for biomedical imaging and non-invasive inspection. However, achieving both broadband and long-wavelength emission remains challenging due to the activator ion site-occupation constraints. In this work, we report La 3 TiGa 5 O 14 :Cr 3+ (LTG:Cr 3+ ) phosphor that exhibits an ultrawideband NIR emission spanning the spectral range of 650–1400 nm. The underlying mechanism involves Ti and Ga site exchange, which triggers local polyhedral reorganization. This structural transformation creates a weak crystal field, large Stokes shift, lower energy barrier of activator ion site occupancy, and more sites favorable for Cr 3+ incorporation ─ collectively relaxing Cr 3+ site-occupation constraints. The optimized LTG:0.03Cr 3+ phosphor exhibits NIR emission at 1017 nm with an exceptionally broad full width at half maximum (FWHM) of 476 nm. Moreover, introducing Ta 5+ as a charge-compensating dopant boosts NIR emission intensity by nearly 3.9-fold. A prototype NIR LED device fabricated with this phosphor demonstrates effective multi-channel signal detection. This work advances site-occupancy engineering from extrinsic doping to intrinsic polyhedral reorganization, providing a molecular design framework for high-performance NIR phosphor.
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高影响因子
Inorganic Chemistry Frontiers
·
2022
·Vol. 9
·期 18
·4602-4607
·
IF 7.779
Meng Zhao,Shengqiang Liu,Hao Cai,Fangyi Zhao,Zhen Song,Quanlin Liu
Near-infrared (NIR) light devices have great potential in non-destructive testing and biomedicine fields. However, the lack of stable and efficient long wavelength NIR phosphors hinders their development. In this work, utilizing the compositional flexibility of antimonate double perovskites, we realized efficient and tunable broadband NIR emissions based on A2MSbO6:Cr3+ materials (A = Ca, Sr, and Ba; M = Ga, In, Sc, and Y). The NIR emission peaks ranged from 825 to 1010 nm by a composition modulation. In particular, Ca2ScSbO6:Cr3+ exhibits an 850 nm-centering broadband NIR emission with an internal quantum efficiency of 84.5% and a high thermal quenching temperature, retaining ∼71% at 410 K of the initial intensity at 80 K. Comparatively, Sr2InSbO6:Cr3+ with a 920 nm-centering broadband emission has 63.2% internal quantum efficiency. This work could help in discovering novel NIR phosphors with long-wavelength emissions and high efficiency.
研究领域:
生物医学工程
·
材料科学
·
光学成像
·
无损检测
·
分子探针开发
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Wenbo Ji,Fengmei Zhu,Yuan Gao,Jianbei Qiu
Near-infrared phosphor-converted light-emitting diodes (NIR pc-LEDs), a widely used NIR light source, are typically prepared by sealing the NIR phosphor powder and an LED chip with epoxy resin. One issue that NIR pc-LEDs frequently encounter is the aging and deterioration of epoxy resin over time, which leads to self-absorption and a sharp decline in emission efficiency. Here, we report the synthesis of a chemically stable NIR luminescent material composed of Cr3+-doped Ba2NaNb5O15 nanocrystals measuring 10–15 nm, with Cr3+ ions located in the octahedral centers of the nanocrystals. Under 460 nm light excitation, the transparent glass-ceramic exhibited a broadband NIR emission in the range of 600–1400 nm, which originated from the electronic transition of Cr3+ from the excited state of 4T2 to the ground state of 4A2. The emission peak was located at ∼810 nm, the FWHM was ∼230 nm, and the internal quantum efficiency reached ∼0.81%. We constructed a stable NIR pc-LED device using optimized transparent NIR-emitting glass-ceramics and a commercially available blue LED chip, demonstrating its promising application in night-vision lighting. Our study provides a basis for the preparation of transparent glass-ceramic-based NIR pc-LED devices as an improved alternative for solid-state illumination.
研究领域:
材料科学
·
光学工程
·
固体照明
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产品关联
DOI
PubMed
高影响因子
Laser & Photonics Reviews
·
2022
·Vol. 16
·期 11
·2200318
·
IF 10.947
Xin Xu,Peigeng Han,Daoyuan Zheng,Kaimin Du,Chunxia Li,Feng Liu,Ruiling Zhang,Keli Han
Recently, lanthanide-doped halide perovskites have attracted increasing attention due to their unique optical properties, such as upconversion (UC) and near-infrared (NIR) emission. However, these emitters suffer from low efficiency, limiting further practical applications. Herein, a Bi 3+ -alloyed double perovskite, Cs 2 NaEr 0.5 Bi 0.5 Cl 6 , with strong NIR-triggered UC and NIR-II (1000–1700 nm) emission is reported. Cs 2 NaEr 0.5 Bi 0.5 Cl 6 exhibits efficient green UC emission with a high quantum yield up to 2.1% and NIR-II emission peaking at 1541 nm with a quantum yield of 37.9% under 980 nm excitation. The strong UC emission is related with the efficient energy transfer between Er 3+ and self-trapped exciton states induced by corporation of Bi 3+ ions. In addition, Bi 3+ ions can act as diluters, suppressing the energy loss caused by undesirable successive energy transfer among Er 3+ ions, enhancing the UC and NIR-II emission. Furthermore, a water-resistant Cs 2 NaEr 0.5 Bi 0.5 Cl 6 /polydimethylsiloxane film is prepared. Excitingly, Cs 2 NaEr 0.5 Bi 0.5 Cl 6 not only shows the potential as a UC thermometry with high sensitivity but also exhibits a high signal to noise ratio in NIR imaging.
研究领域:
材料科学
·
光学
·
纳米技术
·
光子学
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DOI
高影响因子
Advanced Healthcare Materials
·
2023
·Vol. 12
·期 11
·2202817
·
IF 10
Tianguang Liu,Yanli Chen,Huizhe Wang,Mengyuan Cui,Jiaqi Zhang,Wancun Zhang,Peng Wang
Asymmetrical heptamethine cyanine with near-infrared (NIR) absorption is used for photothermal therapy (PTT) of cancer. Aiming to overcome the drawbacks caused by the high temperature of PTT, the development of asymmetrical heptamethine cyanine with photothermal and photodynamic properties is still an attractive strategy. Different from the traditional method of the heavy atom effect, in this work, the carboxyl or sulfonic groups are introduced into the indole ring or branch chain of asymmetrical heptamethine cyanine to afford a series of new phototherapy agents. After being encapsulated by DSPE-PEG 2000 , BSS-Et NPs exhibit robust photostability, efficient reactive oxygen species generation (49%), and excellent photothermal conversion efficiency of about 37.6% under 808 nm laser irradiation. BSS-Et NPs possess passive tumor-targeting properties in vivo to not only visualize the tumor by NIR fluorescence imaging but also eliminate the tumor without any recurrence by photodynamic therapy and PTT synergistic therapy under laser irradiation. In addition, benefitting from the characteristics of organic small molecules, they can be metabolized quickly through the liver without inducing toxicity in the whole body. In general, this study provides a new direction for the development of multifunctional phototherapy agents for cancer treatment.
研究领域:
癌症治疗
·
药物化学
·
生物医学工程
·
材料科学
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产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2021
·Vol. 9
·期 16
·5469-5477
·
IF 7.393
Hao Cai,Shengqiang Liu,Zhen Song,Quanlin Liu
The practical application of near-infrared (NIR) phosphors is hindered due to their limited light emitting region and narrow bandwidth. Here, we report a series of Cr3+-doped olivine phosphors, (Mg1−xLix)(Mg1−xScx)GeO4:Cr3+, with tunable luminescence from NIR-I to NIR II based on crystallographic site engineering. By using a [Li+–Sc3+] unit substituting for a [Mg2+–Mg2+] unit, the NIR luminescence can be largely tuned from 940 nm to 1110 nm, and the corresponding FWHM can be modified from 236 to ∼300 nm. The internal quantum efficiency (IQE) and external quantum efficiency (EQE) of Mg2GeO4:1% Cr3+ were measured to be 48.19% and 16.38%, respectively. The photoluminescence of the phosphors matches well with the absorption of several functional groups. By measuring the NIR absorption of different liquids illuminated by NIR light from our phosphors, qualitative and quantitative analysis can be realized. These results suggest that the super-broad NIR luminescence of (Mg1−xLix)(Mg1−xScx)GeO4:Cr3+ has potential applications as light sources for nondestructive food analysis.
研究领域:
材料科学
·
光学
·
分析化学
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DOI
高影响因子
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