Light-Science & Applications
·
2022
·Vol. 11
·期 1
·1-10
·
IF 20.257
Liu Dongjie,Li Guogang,Dang Peipei,Zhang Qianqian,Wei Yi,Qiu Lei,Molokeev Maxim S.,Lian Hongzhou,Shang Mengmeng,Lin Jun
Near-infrared (NIR)-emitting phosphor-converted light-emitting diodes have attracted widespread attention in various applications based on NIR spectroscopy. Except for typical Cr 3+ -activated NIR-emitting phosphors, next-generation Cr 3+ -free NIR-emitting phosphors with high efficiency and tunable optical properties are highly desired to enrich the types of NIR luminescent materials for different application fields. Here, we report the Fe 3+ -activated Sr 2− y Ca y (InSb) 1− z Sn 2 z O 6 phosphors that exhibit unprecedented long-wavelength NIR emission. The overall emission tuning from 885 to 1005 nm with broadened full-width at half maximum from 108 to 146 nm was realized through a crystallographic site engineering strategy. The NIR emission was significantly enhanced after complete Ca 2+ incorporation owing to the substitution-induced lower symmetry of the Fe 3+ sites. The Ca 2 InSbO 6 :Fe 3+ phosphor peaking at 935 nm showed an ultra-high internal quantum efficiency of 87%. The as-synthesized emission-tunable phosphors demonstrated great potential for NIR spectroscopy detection. This work initiates the development of efficient Fe 3+ -activated broadband NIR-emitting phosphors and opens up a new avenue for designing NIR-emitting phosphor materials.
研究领域:
材料科学
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光学工程
·
光谱学
✓ 已验证
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2023
·
IF 3.6
Bingkai Gao,Lei Zhang,Runqiu Peng,Panlai Li,Qian Wu,Zhijun Wang
The exploration of performance luminescence near-infrared (NIR) material is crucial for rapidly developing NIR spectroscopic techniques. Herein, the NIR LaMg 0.5 Sn 0.5 O 3 :Cr 3+ phosphor was synthesized by a high temperature solid-state method. And its luminescence performance were improved by [In 3+ -Sc 3+ ] substituting for [Mg 2+ -Sn 4+ ]. The half-peak width can be expanded to 211 nm, the emission intensity can reach the seven times of that un-substitution, and the emission intensity at 423 K was maintained at 60 % of that at room temperature , moreover, the internal quantum efficiency can reach 54.2 %. On this basis, the phosphor converted light emitting diodes ( pc -LEDs) were achieved by combining La(Mg 1-x Sn 1-x In x Sc x ) 0.5 O 3 :Cr 3+ with blue LED, importantly, it can be applied to the biodetection and night vision lighting, which indicate its application value.
研究领域:
材料科学
·
生物医学工程
·
光学材料
·
分子影像
·
转化医学
·
光电子学
✓ 已验证
DOI
高影响因子
ACS Catalysis
·
2025
·
IF 13.1
Junjie Zhu,Hongyan Zhao,Qi Wang,Haijiao Kong,Xiaoyue Tu,Yu Zhang,Zhi-Hui Lv,Zhenbao Zhang,Xiangjian Liu,Zhen Xue,Lei Shi,Xin-Ming Hu,Jiawei Zhu,Heqing Jiang,Yongfa Zhu
Sn-based catalysts feature significant potential for acidic CO2 electroreduction (CO2RR) to HCOOH, but encounter unsatisfactory selectivity and poor stability, especially at high current densities. Here, we report In3+-induced In–O–Sn superexchange and oxygen vacancies synergistically enabling ampere-level, selective, and stable CO2-to-HCOOH electroreduction over Sn-based perovskite oxides in a strong acid. For the proof-of-concept catalysts of SrSn1–xInxO3−δ (x = 0.05, 0.1, and 0.2), In3+ introduction not only generates additional oxygen vacancies but also engenders marked In–O–Sn superexchange. This superexchange modulates electronic structures, including the upward-shifted band center (e.g., Sn 5p) and the strengthened Sn–O bond covalency. In HCOOH production, relative to the parent SrSnO3, the SrSn1–xInxO3−δ series demonstrate enhancements in activity and selectivity (more pronounced with In3+ content) while also featuring significantly boosted stability. In strong acid (pH = 1), SrSn0.8In0.2O3−δ achieves high HCOOH selectivity of 91.2% at 1 A cm–2 and a single-pass carbon efficiency of up to 81.0%, together with a steady operation over 80 h, outperforming previously reported Sn-based catalysts. Our experiments and theoretical calculations attribute these performance improvements to the following factors: the superexchange-shifted band centers and the additional oxygen vacancies synergistically facilitating *CO2 protonation to *OCHO; the superexchange-strengthened Sn–O bond covalency stabilizing the Sn–O lattice.
研究领域:
电化学
·
催化化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2024
·Vol. 12
·期 37
·15070-15081
·
IF 5.7
He Lin,Shuangqiang Fang,Tianchun Lang,Jiali Yu,Haoliang Cheng,Jiaqi Ou,Zhijie Ye,Renjie Xu,Xiulan Shui,Haolin Qu,Le Wang
Near-infrared (NIR) luminescent materials exhibit unique photophysical properties that make them crucial components in photobiological, photonic and optoelectronic applications. Nonetheless, almost all rare earth ions are difficult to be efficiently excited by blue light for NIR emission, mainly due to the inherent electron shielding effect of 5s25p6 orbitals. Here, an amazing enhancement of the Tm3+ 3H4 → 3H6 transition (800 nm) was achieved in the SrGa12O19 host upon 450 nm excitation. Compared with the Tm3+ single-doped sample, the internal quantum efficiency (IQE) in the 700–900 nm range was significantly improved from less than 1% to 74%, and the external quantum efficiency (EQE) was enhanced from nearly 0 to 33%, benefitting from the synergistic effect of Cr3+ contribution and electron shielding effect breaker of In3+. XRD structure refinement, time-resolved fluorescence spectroscopy and electron paramagnetic resonance were used to determine the effect of Cr3+ and In3+ doping. Furthermore, the universality of this strategy has also been verified with other rare earth ions (Ho3+, Nd3+, and Yb3+). Finally, a NIR phosphor-converted LED (pc-LED) is fabricated, exhibiting a satisfactory output power of 141 mW@500 mA and demonstrating the potential for photosynthetic bacteria culture, venous imaging and non-destructive testing. This work opens a window for blue light-pumped NIR emission of rare earth ions.
研究领域:
材料科学
·
光学
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生物光子学
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光生物学
✓ 已验证
DOI
高影响因子
Materials Today Chemistry
·
2026
·
IF 6.7
Wanqing Qian,Yan Shu,Cai Pan,Xueqing Yu,Weitao Su,Mikhail P. Kuz'min,Kaixin Song
Near-infrared phosphor conversion light emitting diode (NIR pc-LED) has important application value in plant growth, night vision imaging and biological detection. Its performance depends on the optimized design of fluorescent materials. Based on gadolinium gallium garnet (Gd 3 Ga 5 O 12 ), the near-infrared phosphors of Gd 2.5 (CaSn) 0.5 (InAl) 0.5 Ga 3.5-x O 12 : xCr 3+ (x = 0.01–0.09) were prepared by Ca 2+ -Sn 4+ /In 3+ -Al 3+ double ion pair synergistic substitution strategy. Under excitation of 450 nm blue light, the material exhibits broadband near-infrared emission covering the range of 650–1150 nm, with a quantum yield of 96.29 %. The material exhibits excellent thermal stability of luminescence and can maintain 82.4 % of the initial emission intensity at room temperature at 423K. The NIR pc-LED device based on this phosphor package achieved 67.37 mW output power and 16.68 % photoelectric conversion efficiency at 100 mA driving current. Application verification shows that the NIR pc-LED light source shows excellent performance in plant supplementary light, night vision security, information encryption and nondestructive testing applications. It fully proves that the broadband near-infrared emission of this series of phosphors can take into account multi-functional application scenarios and has broad development prospects.
✓ 已验证
产品关联
DOI
高影响因子
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