Advanced Optical Materials
·
2023
·Vol. 11
·期 7
·2202466
·
IF 9
Zhihao Zhou,Fanquan He,Enhai Song,Shuai Zhang,Xiaodong Yi,Hao Zhang,Yakun Le,Shi Ye,Shanhui Xu,Jianrong Qiu,Guoping Dong
Broadband near-infrared (NIR) phosphors have recently received considerable attention in spectroscopy technology fields, but designing inexpensive, emission peaks centered above 800 nm, and multimodal broadband NIR luminescence material still remains a great challenge. Here, by selecting stannate compound Mg 2 SnO 4 (MSO) as the host, a kind of broadband NIR phosphor MSO:Cr 3+ with multimode luminescence properties is reported. The designed material exhibits an emission peaking at 800 nm and a full-width at half maximum of 180 nm (≈2730 cm −1 ). The site occupation of Cr 3+ in MSO is unraveled by density functional theory calculation. The constructed NIR light-emitting device based on MSO:Cr 3+ displays a high NIR output power of 187.19 mW@100 mA and remarkable photoelectric efficiency of 13.67%, and its multifunctional applications in information encryption, non-destructive detection, and so on are also demonstrated. Additionally, through defect site reconstruction, MSO:Cr 3+ presents superior broadband NIR persistent luminescence (PersL) properties with PersL duration time longer than 50 h. This work provides a feasible strategy to develop intelligent optical material integrated with multimodal luminescence through low-cost stannate compounds as the host toward versatile applications such as non-destructive detection and bioimaging.
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Zhongxiang Shao,Xianju Zhou,Li Li,Yongjie Wang,Faling Ling,Chuan Jing,Xiao Tang,Zhongmin Cao
The broadband near-infrared (NIR) phosphor converted light emitting diode (NIR pc-LED) has garnered unprecedented attention due to its crucial role in NIR applications. However, there remains a scarcity of efficient broadband NIR luminescence materials capable of emitting NIR light with wavelengths greater than 800 nm. This study reports the synthesis, crystal structure and photoluminescence (PL) properties for double perovskite Sr 2 ScTaO 6 :Cr 3+ phosphors which exhibit a broadband NIR emission in the 650–1250 nm range, peaking at∼815 nm with the full width at half maximum (FWHM) of 161 nm. The observed broadband emission arises from two distinct Cr 3+ centers, namely Sc 3+ and Ta 5+ octahedral sites within the Sr 2 ScTaO 6 structure, as demonstrated by luminescence and decay kinetic analysis. A significant enhancement of the thermal stability and a remarkable broadening of the FWHM (from 161 to 275 nm) are achieved by employing Yb 3+ co-doping strategy. The efficient energy transfer from Cr 3+ to Yb 3+ was confirmed through emission and excitation spectra, as well as luminescence decay measurements. Finally, Sr 2 ScTaO 6 :Cr 3+ -Yb 3+ phosphor was integrated with a 470 nm blue LED chip to fabricate a NIR pc-LED device, and its potential application in night vision was evaluated.
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Zuizhi Lu,Hua Fan,Yingjun Ou,Mianhong Chen,Ye Yang,Linawa Shen,Liya Zhou,Xiaotong He,Jiansheng Zhao,Peican Chen
Recently, near-infrared (NIR) light-emitting diodes (LED) have attracted much research attention globally. To advance this technology, NIR phosphors with high efficiency, thermal stability, and broad bands are required. In this work, we modified ZnGa 2 O4:Cr 3+ phosphor with Mg 2+ ions. Results show that this method improves the luminescence intensity of ZnGa 2 O4:Cr 3+ phosphor, and the emission wavelength of the sample can be changed by doping different Mg 2+ concentrations. This method also improved the thermal stability of the samples. The quantum yield of Mg-modified ZnGa 2 O 4 :Cr 3+ phosphors reached 87.12%, and the white LED fabricated with Zn 0.4 Mg 0.6 Ga 2 O 4 :0.01Cr 3+ phosphor and commercial Y 3 Al 5 O 12 :Ce 3+ phosphor demonstrated good performance. The NIR-LED fabricated with Zn 0.4 Mg 0.6 Ga 2 O 4 :0.01Cr 3+ phosphor achieved a photoelectric conversion efficiency of 7.17%. The lines on the surface of an orange taken by a NIR camera reveal that phosphor can be used in night vision lighting. Meanwhile, the distribution of blood vessels in the human palm highlights the promising biological applications of the Zn 0.4 Mg 0.6 Ga 2 O 4 :0.01Cr 3+ phosphor.
✓ 已验证
产品关联
DOI
高影响因子
Photonics Research
·
2023
·Vol. 11
·期 10
·1781-1790
·
IF 7.6
You-Long Chen,You-Long Chen,You-Long Chen,Yi-Hua Hu,Yi-Hua Hu,Yi-Hua Hu,Yi-Hua Hu,Xing Yang,Xing Yang,Xing Yang,You-Lin Gu,You-Lin Gu,You-Lin Gu,Xin-Yu Wang,Xin-Yu Wang,Xin-Yu Wang,Yu-Hao Xia,Yu-Hao Xia,Yu-Hao Xia,Xin-Yuan Zhang,Xin-Yuan Zhang,Xin-Yuan Zhang,Yu-Shuang Zhang,Yu-Shuang Zhang,Yu-Shuang Zhang,Yu-Shuang Zhang
Graphene quantum dots (GQDs), fascinating semiconductors with stable photoluminescence (PL), have important potential applications in the fields of biology, medicine, and new semiconductor devices. However, it is still challenging to overcome the weak PL intensity. Here, we report a strategy for selective resonance enhancement of GQD fluorescence using gold nanoparticles (AuNPs) as plasmas. Interestingly, the addition of low concentration AuNP makes AuNP/GQDs exhibit significant fluorescence enhancement of 2.67 times in the visible range. The addition of high concentration AuNP leads to the formation of an excitation peak at 421 nm and selectively enhances certain radiation modes. We concluded that the main reason for the selective enhancement of PL intensity in high concentration AuNP is the transfer of generous hot electrons at high energy states from AuNP to GQD and relaxation to the ground state. The electron resonance of low concentration AuNP transfers to GQD and relaxes to lower energy levels, exhibiting an overall enhancement of PL intensity. We apply it for detection of the heavy metal ion Cr3+, and verify that it has a correlation coefficient of 97.36%. We believe AuNP/GQDs can be considered excellent candidates for heavy metal detection and high fluorescence bio-imaging.
✓ 已验证
产品关联
DOI
高影响因子
Materials Advances
·
2023
·Vol. 4
·期 19
·4583-4589
·
IF 5
Lingxiang Chu,Yi Qin,Tao Yang,Jing Wan,Qiang Zhou,Huaijun Tang,Yanqing Ye,Zhengliang Wang
The search for chromium-doped near-infrared phosphor for spectroscopy application has attracted widespread concern. Herein, we prepared a double-perovskite fluoride phosphor, Rb2NaScF6:Cr3+ (abbreviated as RNSF:Cr), with wide blue excitation and near-infrared emission bands using a co-precipitation method. The crystal and electronic structures, as well as the luminescent properties were systematically investigated. Evidences show that RNSF offers a weak coordination environment and a wide bandgap for Cr3+ doping. By virtue of the weak electron–phonon coupling effect and the large activation energy, a high photoluminescence thermal stability was observed at 150 °C, with a ratio of 92% of that at 25 °C. In view of the high thermal stability, RNSF:Cr phosphor was incorporated into phosphor-converted light-emitting diodes to evaluate its potential use for near-infrared spectroscopy applications.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry B
·
2020
·Vol. 9
·期 4
·1131-1137
·
IF 5.344
Yaling Lin,Jie Hu,Luyan Wu,Qilin Zou,Dejian Chen,Decai Huang,Hongyu Lu,Shi-Bin Wang,Haomiao Zhu
Persistent luminescence nanoparticles (PLNPs) emitting in the NIR window (700–1700 nm) have shown great promise in the field of fluorescence imaging due to their unique properties, including the absence of in situ excitation and low optical scattering in tissues. However, they are still facing some challenges, such as irregular shape, wide size distribution and poor persistent luminescence performance. Here, we report a facile mesoporous template method for synthesizing mSiO2@Zn0.6Ca0.4Ga2O4:Cr3+,Yb3+ (mSiO2@ZCGO) persistent luminescent nanoparticles, which show a regular morphology and a size of about 69 nm. In addition, these nanocrystals exhibit persistent luminescence in multi-NIR windows, the first infrared window (∼696 nm of Cr3+ emission) and second infrared window (∼1000 nm of Yb3+ emission). Under illumination of a 254 nm UV lamp for 10 min, the persistent time of Cr3+ ions and Yb3+ ions lasted more than 120 min and 10 min, respectively. In particular, the NIR persistent emission of mSiO2@ZCGO could be stimulated by soft X-ray, which is beneficial to long-term imaging in deep tissues. The optical penetration length of Yb3+ ions persistent luminescence was evaluated to be 2.8 mm. These results demonstrate the great promise of mSiO2@ZCGO for deep-tissue bio-imaging.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF LUMINESCENCE
·
2019
·
IF 2.961
Wei Xu,Yuwei Hu,Longjiang Zheng,Zhiguo Zhang,Wenwu Cao
Optical temperature sensors based on rare earth ions activated luminescent materials have presented their capabilities in thermal reading with good stability and high spatial resolution. The ongoing challenge is to improve the luminescence for further enhancing temperature measurement sensitivity and accuracy. Here, several Er 3+ -Yb 3+ codoped CaWO 4 phosphors are prepared and Cr 3+ ions are introduced, trying to modify the upconverion (UC) emissions from Er 3+ ions. Under the excitation of 980 nm laser, green UC luminescence from 2 H 11/2 and 4 S 3/2 states of Er 3+ is successfully strengthened with Cr 3+ codoping. Through the analysis of characterization by scanning electron microscopy, X-ray diffraction, Raman spectroscopy , and time-resolved spectroscopy, it is found that the dopant of Cr 3+ ions could affect the crystallinity and distort the crystal structure of the as-prepared samples. The thermometry behavior based on green emissions of Er 3+ is studied via fluorescence intensity ratio method. It is interesting to observe that the temperature sensing performance has also been influenced by the incorporation of Cr 3+ . When introducing 9 mol% Cr 3+ ions into Er 3+ -Yb 3+ codoped CaWO 4 phosphors, a maximum sensitivity of about 1.91% K −1 has been achieved. Combined with the intense green luminescence, CaWO 4 : Er 3+ -Yb 3+ -Cr 3+ would be a promising candidate for optical thermometry with excellent measurement sensitivity and accuracy.
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 27
·21290-21296
·
IF 3.84
Fanpeng Cai,Yubin Tang,Fangyan Chen,Yan Yan,Weidong Shi
The removal of tetracyclines (TC), the extensively used antibiotics, from the environment has become an important issue. Recently, photocatalytic oxidation on the surface of semiconductors has been found to provide a good tool for the degradation of TC; however, most of these reactions are UV-light driven rather than visible-light driven. Here, Cr doping of SrTiO3 results in a large decrease in the band gap energy, making Cr3+ doped SrTiO3 (Cr-STO) an attractive material for use as a visible-light-driven photocatalyst for tetracycline (TC) degradation. The photoactivity is improved when the Cr/Sr weight ratio changes from 0.5% to 2%, and decreases when the Cr/Sr weight ratio changes from 3% to 10%. In this paper, we also explain the relationship between the doping and the photocatalytic activity. The existence of ˙OH radicals and holes was studied by the electron spin resonance (ESR) spin-trap technique and trapping experiments.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2025
·
IF 5.1
Yi Lin,Gaoming Dong,Hang Lin,Bo Wang,Pengfei Wang,Ju Xu,Yao Cheng,Yan Xiong,Yuansheng Wang
The rise of laser diode (LD)-driven phosphor-converted near-infrared (NIR) lighting sources, offering unparalleled advantages in terms of brightness and imaging resolution, is hindered by a scarcity of color converters possessing desired properties. Herein, we synthesized a new Ca2YScAl2Si2O12:Cr3+ (CYSAS:Cr3+) broadband NIR-emissive garnet phosphor with a full width at half maximum (FWHM) of 165 nm, attributed to the presence of Cr3+ ions at two distinct crystallographic sites in CYSAS as verified through spectroscopic analyses. With the aid of a rapid infrared firing technique pioneered in our lab, a phosphor-in-glass film (PiGF) composite was then successfully sintered onto a sapphire plate (SP), showing minimal interfacial reactions during co-sintering and thus retention of luminescent properties. The saturation behavior of luminescence under intense blue laser irradiation was meticulously examined across different excitation modes. By incorporating a “phosphor wheel”, we achieved a peak NIR output power of 2626 mW (@17 W or 21.7 W mm−2), surpassing the majority of previously reported phosphor-converted lighting sources. The demonstration experiments highlighted the potential applications of the engineered laser-driven NIR light source in non-destructive detection, quantitative analysis of organic components, night vision and biological imaging.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2025
·
IF 3.6
Zhiwei Xia,Lan Yao,Xin Pan,Ke Su,Rujun Yang,Yuanhao Jian,Rong-Jun Xie,Lefu Mei
The development of efficient dual-emissive and temperature-sensitive luminescent materials is critical for advancing non-contact optical thermometry. Herein, we employed a co-doping strategy to enhance energy transfer pathways in Ca 9 Ga(PO 4 ) 7 phosphors. Under 331 nm excitation, dual emissions from Eu 2+ (415 nm) and Cr 3+ (696 nm) were achieved, with Zn 2+ enhancing the near-infrared (NIR) of Cr 3+ . The optimal Cr 3+ concentration led to an approximately six-fold increase in NIR emission intensity, attributed to Eu 2+ -induced crystal field modulation and efficient dipole-dipole energy transfer, which are evidenced by comparing the emission spectra and decay curve lifetimes. Temperature-dependent emission spectra revealed that Eu 2+ emission remained stable, while Cr 3+ emission exhibited significant temperature sensitivity in Ca 9 Ga(PO 4 ) 7 :Zn 2+ ,Eu 2+ ,Cr 3+ , enabling precise temperature sensing with a peak sensitivity of 1.256 % K −1 at 298 K. This work offers a novel approach to improving energy transfer efficiency and dual-emission properties, contributing to the development of high-performance, real-time optical thermometry and photonic technologies.
✓ 已验证
产品关联
DOI
高影响因子
Materials Horizons
·
2025
·
IF 10.7
xuesong wang,Yao Xiao,Puxian Xiong,pan zheng,Sheng Wu,Zhiyao Zhou,Binli Xiao,Peishan Shao,meihui zhang,jianhui liu,Jiulin Gan,yan qang,Qi Qian
Near infrared mechanoluminescence (NIR-ML) materials have attracted the attention of researchers due to their unique advantages, such as high resistance to bright-field interference and higher penetration depth into biological tissues. However, the reported NIR-ML materials are mainly focused on rare ion activated narrow-band emission ones. In this work, we report a NIR-ML material of BaGa12O19:Cr3+ by solid state rection method. The bright broad NIR ML (650-1000 nm) is observed at lower force loads (12N), which is based on the Cr3+ ion’s multi-lattice site occupation. After heat treatment at 573 K for 20 min, BaGa12O19:Cr3+ still maintains 84.4% of its ML intensity. Furthermore, the ML intensity of BaGa12O19:Cr3+ is also significantly improved after UV pre-irradiation. Due to the defective piezoelectric photonic effect, BaGa12O19:Cr3+ has great self-recoverable properties even in the absence of UV and sunlight irradiation. Finally, the ML penetration rate of BaGa12O19:Cr3+ has reached as high as 66.97% in biological tissues, which suggests a potential prospect for biostress detection towards bio-imaging applications.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Hangzhang Kou,Fanlei Qin,Jianfeng Wang,Esmaeil Heydari,Gongxun Bai
Near-infrared (NIR) wireless communication has been widely investigated because of its fast transmission speed and good penetration barrier performance. Despite their promising characteristics, the implementation of these materials is substantially limited by thermal degradation effects. To address this challenge, we developed Cr3+-activated gadolinium gallate phosphors that exhibit an emission bandwidth of 92.8 nm at half-maximum intensity while maintaining 86.3% of the initial luminous intensity at 150 °C. Furthermore, phosphor-converted light-emitting diodes (pc-LEDs) were manufactured, attaining a 1060 mW NIR output power and 360 mA current. The device was used to test the signal transmission effect using the prepared NIR pc-LEDs as the light source. In the case of input sine wave, inverse sine wave, and triangle wave, the transmission of the waveform was realized, and its penetration performance was tested. The experimental findings demonstrate that the proposed material exhibits promising applications in NIR optical communication systems.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）