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.
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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.
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DOI
高影响因子
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2025
·
IF 4.6
Yingfang Li,Hai Wu,Bin Cao,Tingting Zhang,Yixi Lu,Chaoyong Deng,Weichao Huang
Developing far-red phosphors with high thermal stability and spectral matching is of great significance for plant growth light-emitting diodes (LEDs). In this paper, NaAl 5 O 8 : Cr 3+ far-red emitting phosphors were synthesized by the high-temperature solid-phase reaction method. The crystal field parameters, luminescence properties, and thermal quenching behavior were investigated in detail. The NaAl 5 O 8 : Cr 3+ phosphor showed a far-red emission band centered at 707 nm, which is attributed to the 2 E→ 4 A 2 transition of Cr 3+ ions. Notably, NaAl 5 O 8 : Cr 3+ phosphor exhibited outstanding thermal stability, with an integrated emission intensity reaching 109 % at 423 K compared to that at room temperature (298 K), corresponding to a 9 % increase in emission intensity at high temperature. The full width at half maximum in the temperature-dependent emission spectra increased with increasing temperature. Eventually, a prototype LED device was fabricated by integrating the NaAl 5 O 8 : Cr 3+ phosphors and a commercial 410 nm LED chip. The obtained electroluminescence spectrum of the LED was well matched with the absorption band of the photosensitive pigment P FR , and the fabricated LED performed well in plant cultivation applications. In the sunflower plant growth experiment, the average growth rate under pc-LED irradiation was 1.8 times that under sunlight. These results indicate that NaAl 5 O 8 : Cr 3+ phosphor has great potential for application in plant growth LEDs.
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DOI
高影响因子
CRYSTENGCOMM
·
2025
·Vol. 27
·期 19
·3134-3142
·
IF 2.6
Yikun Zhang,Pan Hu,Yongfu Liu,Jianfeng Sun,Jun Jiang
Al2O3:Cr3+ ruby is one of the most popular materials for lasers because it has unique optical and physical properties. How to obtain Al2O3:Cr3+ efficiently and economically remains a challenge. In this study, Al2O3:Cr3+ transparent ceramics were prepared through a traditional solid-state process in a vacuum environment. A high transmittance of 76.8% at 1200 nm, approaching that of single crystals, can be reached in the pure Al2O3 transparent ceramic. The photoluminescence, micromorphology, thermal conductivity, and mechanical characteristics of Al2O3:Cr3+ transparent ceramics were studied. A ruby with a thermal conductivity of about 38 W m−1 K−1 and a high hardness of 1859 HV was prepared. These results indicate that Al2O3:Cr3+ transparent ceramics have broad prospects to serve as a substitute for Al2O3:Cr3+ single crystals in certain fields.
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yu Zhang,Kai Li,Ze Wang,Sur Lig,Hala Muji,Qixu Tian,Yuansong Gao,Nari Mai,Xinyu Gu,Fengqi Zhao,Kefu Chao,Dengfeng Peng
Near-infrared (NIR) mechanoluminescent materials are attracting significant attention due to their potential applications in biomedical imaging, food analysis, and night vision. In this study, Tb 3 Al 5 O 12 :Cr 3+ (TAG:Cr 3+ ) phosphors were successfully synthesized using a conventional high-temperature solid-state method. These materials demonstrated enhanced NIR luminescence through energy transfer (ET) between Tb 3+ and Cr 3+ . The structural and luminescent properties of the TAG:Cr 3+ phosphors were systematically investigated, revealing a strong spectral overlap between the emission of Tb 3+ and the excitation of Cr 3+ , which facilitates efficient ET. When embedded in polydimethylsiloxane (PDMS) composites, the phosphors exhibited notable mechanoluminescence (ML) properties, showing robust response and recoverability under repeated mechanical stimulation. Density functional theory (DFT) calculations further elucidated the luminescence mechanism at the atomic scale, highlighting charge transfer interactions between the TAG:Cr 3+ phosphors and the PDMS matrix. The analysis of ML intensity versus applied force using grayscale values enabled more accurate determination of their linear relationship. Furthermore, the prepared NIR pc-LEDs demonstrated strong performance in applications such as tissue imaging, food damage detection, and night vision. Meanwhile, the NIR-ML films showed promising potential for in vivo bio-stress imaging. These findings pave the way for the development of high-performance, multimodal NIR-emitting materials for diverse applications.
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DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2022
·
IF 4.171
Liwei Zeng,Jiyou Zhong,Chaojie Li,Zeqiang Zhuang,Lei Chen,Weiren Zhao
Near-infrared phosphor-converted light-emitting diodes (NIR pc-LEDs) have attracted more and more attention for the applications in spectroscopic technology, promoting the demand of searching broad-band near-infrared phosphors. In this work, Cr 3+ -doped NaInP 2 O 7 phosphors with broadband NIR emission were synthesized via conventional high-temperature solid-state reaction method. The crystal, photoluminescence , and the performance of fabricated device were investigated in detail. The photoluminescence demonstrates this material exhibits an intense absorption in blue light region, matching well with the blue LED chip; while the emission spectra peaking at 870 nm covers 650–1150 nm region with a full width at half maximum (FWHM) of about 150 nm. The quantum yield (QY) and absorption efficiency was determined to be 28.2% and 49.82%, respectively, under 460 nm blue light excitation. Finally, a NIR pc-LED device was fabricated by using a commercial 455 nm blue LED combined with as-prepared NaInP 2 O 7 :Cr 3+ phosphor, which has an output power of 9.08 mW and photoelectronic conversion efficiency of 2.98% under a driving current of 100 mA, indicating that the as-prepared phosphors might have a good potential for application in NIR pc-LEDs.
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高影响因子
Arabian Journal of Chemistry
·
2024
·Vol. 17
·期 9
·105921
·
IF 5.3
Lingxiang Chu,Enbei Yang,Han Ma,Jing Wan,Tao Yang,Yi Qin,Yanqing Ye,Qiang Zhou,Zhengliang Wang
The recent years have witnessed a great leap for near-infrared (NIR) spectroscopy technology in multifunctional application fields. In this study, a double-perovskite structured Cr 3+ -doped Cs 2 KScF 6 fluoride NIR phosphor with peak location at 778 nm and full-width at half maximum (FWHM) of 95 nm was synthesized by a co-precipitation method. The integral emission intensity at 423 K retains 70 % of that at room temperature (RT), showing good luminescent thermal stability. Combining the obtained phosphor in an NIR phosphor converted light-emitting diode (NIR pc-LED) device, the output power and photoelectric conversion efficiency can reach 72.28 mW and 6.83 % at 320 mA. By virtue of the good optical performance, clear structural images of different fruits were visualized by using the NIR pc-LED as light source, suggesting the potential of Cs 2 KScF 6 :Cr 3+ phosphor to be used in high-power LED devices.
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高影响因子
Crystals
·
2023
·Vol. 13
·期 7
·1000
·
IF 2.7
Zhuanzhuan Zhang,Yanjie Liang
Cr3+-doped broadband infrared luminescent materials have attracted growing attention in consideration of their potential applications in phosphor-converted infrared light sources. However, discovering infrared-emitting luminescent materials with ultrabroadband emission and excellent thermal stability still remains a challenge. In this work, we report the significant improvement of infrared photoluminescence properties in Na3ScSi3O9:Cr3+phosphor via Li+substitution and Yb3+codoping. The prepared Na3ScSi3O9:Cr3+phosphor can produce broad infrared emission over 650–1350 nm with a peak maximum at 898 nm under the excitation of blue light. Through the substitution of Li+for Na+, the maximum infrared emission peak can be tuned from 898 nm to 850 nm. When the Li+content is 0.5, the integrated infrared luminescence intensity of the obtained Na2.5Li0.5ScSi3O9:Cr3+phosphor increases by 4.2 times compared with that of the Na3ScSi3O9:Cr3+phosphor, and the luminescence thermal stability is also improved significantly (58.5%@100 °C). Moreover, Yb3+codoping can simultaneously realize the characteristic infrared luminescence of Cr3+and Yb3+, resulting in a broadened spectral width due to efficient energy transfer from Cr3+to Yb3+. Finally, an ultrabroadband infrared light-emitting diode prototype is fabricated through a combination of the optimized Na2.5Li0.5ScSi3O9:2%Cr3+,0.5%Yb3+phosphor with a commercial 490 nm LED chip, giving an infrared output power of 5.2 mW at 320 mA drive current. This work provides an effective way to optimize the infrared photoluminescence performance of Cr3+-doped Na3ScSi3O9infrared phosphors.
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DOI
高影响因子
Applied Materials Today
·
2026
·
IF 6.9
Feifeng Huang,Renguang Ye,Chenxia Li,Shuangbin Ma,Feiting Huang,Degang Deng,Shiqing Xu
Cr 3+ -activated near-infrared (NIR) phosphors have attracted significant attention in recent years owing to their potential applications in nondestructive testing, bioimaging, and night vision technologies. However, the development of high-performance NIR phosphors remains a considerable challenge. In this work, a novel broadband NIR-emitting phosphor, YGdScSbO 7 : Cr 3+ , was successfully synthesized via a high-temperature solid-state reaction. The obtained phosphor exhibits a strong emission centered at 763 nm with a full width at half maximum (FWHM) of 142 nm. Inspired by the cation substitution strategy, the partial substitution of Sc 3+ with Ga 3+ ions significantly improves the emission intensity and quantum efficiency. The optimized sample, YGdScSbO 7 : 0.03Cr 3+ , 0.8Ga 3+ , shows a broadband NIR emission covering the 600–950 nm region with a FWHM of 117 nm and an internal quantum efficiency as high as 73.89%. Furthermore, the sample maintains approximately 56.64% of its initial emission intensity at 363 K, indicating great thermal stability. A NIR phosphor-converted LED (pc-LED) fabricated by the optimized phosphor with a 450 nm blue LED chip delivers an output power of 8 mW under the 180 mA driving current, demonstrating promising potential for applications in night vision illumination, nondestructive inspection, and biomedical imaging.
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Jianhua Lin,Liuyan Zhou,Long Ren,Yuyu Shen,Yanling Chen,Jie Fu,Lei Lei,Renguang Ye,Degang Deng,Shiqing Xu
Near-infrared (NIR) phosphors converted to light-emitting diodes (pc-LED) sources have extensive application prospects in medical imaging, foodstuff analysis and plant growth fields. However, there are some shortcomings in NIR phosphors, such as narrow emission band and poor thermal stability. Here a new wide band NIR luminescent phosphor Cr 3+ -doped Sr 3 Sc 4 O 9 (SSO) is introduced. The emission spectrum ranges from 600 nm to 1000 nm, with a peak value of 761 nm and the value of full width at half maximum (FWHM) is 120 nm. The internal quantum efficiency (IQE) of sample is about 87% according to the fitting result. The most appropriate doping concentration is x = 0.02 and the best excitation wavelength is 468 nm, which matches the commercial blue chip. At the same time, the phosphor shows good thermal stability in variable temperature spectrum test, and can maintain 70.4% emission intensity at 373 K relative to room temperature . To better understand its practical applications, packaged pc-LED is designed to show good NIR light penetration in spectral penetration tests . This study provides an excellent choice of NIR phosphors.
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高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2024
·
IF 4
Feifeng Huang,Yuqing Yan,Guanyu Zhu,Yi Zhang,Zhexuan Gao,Mingwei Fu,Ying Tian,Degang Deng,Shiqing Xu
Near-infrared phosphor-converted light-emitting diodes (NIR pc-LEDs) are highly promising for various applications, including food analysis, night vision, and biological detection. In this work, we report a Cr 3+ -doped Zn 7 Sb 2 O 12 phosphor, which was prepared through a high-temperature solid-phase method. Under excitation at 400 nm, the phosphor reveals an emission spectrum that extends from 700 to 1400 nm, peaking at 950 nm with a full width at half maximum (FWHM) of 179 nm. In addition, the internal quantum efficiency (IQE) of the Zn 7 Sb 2 O 12 : 0.01Cr 3+ phosphor is recorded at 33.13%. When encapsulated in pc-LEDs, the phosphor achieves a near-infrared (NIR) output power of 18.90 mW at 160 mA, along with a photoelectric conversion efficiency (PCE) of 15.45% at 20 mA. The developed pc-LED shows promise in non-destructive testing and night vision technologies.
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高影响因子
JOURNAL OF LUMINESCENCE
·
2021
·
IF 3.599
Yanting Zhu,Chenxia Li,Degang Deng,Hua Yu,Hao Li,Le Wang,Changyu Shen,Xufeng Jing,Shiqing Xu
A series of Eu 2+ /Cr 3+ co-doped BaAl 12 O 19 phosphor was synthesized by traditional high temperature solid stated method, and the temperature-sensitive characteristic of the phosphor was researched. Due to the temperature sensitivity of the fluorescence lifetime of Cr 3+ , the thermometry based on fluorescence lifetime can be realized. Furthermore, the emissions of Eu 2+ ion and Cr 3+ ion can be well separated, which shows the excellent signal recognition ability of this phosphor. The Eu 2+ /Cr 3+ co-doped BaAl 12 O 19 phosphor can be used for the thermometry based on fluorescence intensity ratio. A dual-mode optical thermometry is proposed and researched in the temperature range of 293–563 K by using the decay lifetime of Cr 3+ emission and in the temperature range of 295–476 K by using the fluorescence intensity ratio of Eu 2+ to Cr 3+ as temperature readout. The maximum values of relative sensitivity are 0.466% K −1 at 363 K and 0.259% K −1 at 476 K. The Eu 2+ /Cr 3+ co-doped BaAl 12 O 19 phosphor has excellent optical temperature characteristic , and its dual-mode thermometry characteristics provide convenience for the application of this material. This phosphor has potential application prospects in the field of optical thermometry.
研究领域:
材料科学
·
光学工程
·
无机化学
·
传感器技术
·
功能材料
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