MATERIALS RESEARCH BULLETIN
·
2017
·
IF 2.446
Lin Lin,Jixing Chen,Zhezhe Wang,Zhuohong Feng,Feng Huang,Biao Zheng,Lili Huang,Zhipeng Yu,Zhiqiang Zheng
The NaBaPO 4 :Eu 2+ ,Yb 3+ quantum-cutting (QC) phosphors were prepared by the solid-state reaction. We confirm the luminescence of Yb 3+ is mainly derived from QC rather than common down-conversion. The QC efficiency η QE calculated from the luminescence decay curves reached a maximum as high as 197.4%. Furthermore, the QC emission was enhanced by decorating with quasi-spherical and uniform (∼100 nm) Ag nano-particles, due to localized surface plasmon resonance. The enhancement factor reached a maximum as 1.2337.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2016
·Vol. 16
·期 4
·3679-3683
·
IF 1.338
Li Suwen,Huang Qingqing,Jiang Yi,Hu Min
A series of Ce3+-Yb3+ co-doped CaF2 nanoparticles were prepared by a hydrothermal synthesis method. The structure, morphology, photoluminescence properties, and fluorescence dynamics were studied systemically. Under the excitation of the 5d level of
Ce3+, an efficient energy transfer from Ce3+ to Yb3+ occurred, and the efficient near-infrared emission at 900–1050 nm matching to the energy of Si band gap of Si-based solar cells was observed. The lifetime of Ce3+ decreased, and the inner
quantum efficiency increased with increasing Yb3+ concentration. The quantum efficiency dependent on Yb3+ concentration was calculated, and the maximum efficiency approached 186%. As a down-conversion luminescent convertor, this kind of material can be used in front of
Si-based solar cells to reduce thermalization loss and enhance conversion efficiency of solar cells.
研究领域:
材料科学
·
光物理学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF LUMINESCENCE
·
2022
·
IF 4.171
Hongli Wen,Zhurong Mo,Chonge Ta,Zhongfei Mu,E.A. Dawi,Ming Sun,Gao Cheng,Lin Yu,Deshmukh Abdul Hakeem
Na 0.90- y AlSiO 4 :0.1Er 3+ , y Yb 3+ (0 ≤ y ≤ 0.007) phosphors were prepared by the solid state reaction method and their dual mode multicolor luminescence properties were systematically investigated. The phosphors were crystallized into the carnegieite polymorph of NaAlSiO 4 at 1300 °C. The synthesized phosphors were characterized by using powder XRD technique, FT-IR and UV-VIS-NIR diffuse reflectance spectra. Upon 380 nm excitation, the phosphors emitted visible and NIR downconversion emission, which follows the quantum cutting process. The upconversion emission spectra , irrespective of the laser excitation wavelength (980 nm, 808 nm, or 1550 nm), show characteristics sharp green, and red emissions, from 2 H 11/2 → 4 I 15/2 , 4 S 3/2 → 4 I 15/2 , and 4 F 9/2 → 4 I 15/2 transitions of Er 3+ , respectively. Intense green (552 nm), red (664 nm) and NIR (809 nm) emissions were observed at 980, 808 and 1550 nm laser excitation, respectively. The dual mode emission of the Na 0.90- y AlSiO 4 :0.1Er 3+ , y Yb 3+ (0 ≤ y ≤ 0.007) phosphors is enhanced upon Yb 3+ co-doping. By analyzing the dependence of upconversion emission intensities on the laser excitation power, a possible upconversion emission mechanism is proposed.
研究领域:
材料科学
·
光学
·
发光材料
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2019
·
IF 2.961
Lin Lin,Zhipeng Yu,Zhezhe Wang,Zhuohong Feng,Feng Huang,Lili Huang,Qionghua Dai,Fengfen Zhang,Zhiqiang Zheng
Au@SiO 2 /NaYF 4 :Tb 3+ ,Yb 3+ @NaYF 4 nanocomposites are acquired by combining Au@SiO 2 nanorods with ligand-free NaYF 4 :Tb 3+ ,Yb 3+ @NaYF 4 nano-particles in water solution due to the electrostatic attraction. Plasmon-enhanced upconversion (UC) and quantum-cutting (QC) are both obtained and optimized in these nanocomposites by adjusting SiO 2 shell thickness and concentrations of Au@SiO 2 . While the thickness of SiO 2 shell is 35 nm, the enhancement factor of UC and QC reaches maximum as 1.91 and 3.47 times, respectively. The nanocomposites may be applied in biological fluorescence label, super-resolution imaging and solar cells, etc.
研究领域:
纳米技术
·
光学
·
材料科学
·
生物医学工程
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Guoxiang Song,Chaogang Lou,Bowen Shen,Zi Wang,Ruiqi Zhu
We achieved a quantum cutting process in Pr 3+ -Yb 3+ co-doped CaF 2 that converts one visible photon into two near-infrared photons matching the silicon band gap. In this study, the quantum cutting process between Pr 3+ and Yb 3+ was experimentally verified through comparative analysis of the normalized absorption spectrum of Pr 3+ and the near-infrared excitation spectrum of Yb 3+ . Fluorescence lifetime measurements at the optimal doping concentration revealed an energy transfer efficiency of 60.99% from Pr 3+ to Yb 3+ . Temperature-dependent luminescence spectroscopy further estimated the luminescence efficiencies as 64.49% (Pr 3+ ) and 71.41% (Yb 3+ ). Based on these results, the theoretical quantum efficiency of the Pr 3+ →Yb 3+ system was obtained to be about 112.26%, confirming the occurrence of efficient photon down-conversion. Considering the limited energy gain from sunlight due to the narrow-band absorption of Pr 3+ by f-f forbidden transition, Eu 2+ ions were employed to perform broadband sensitization on the quantum cutting process of Pr 3+ -Yb 3+ . Studies have suggested that the incorporation of Eu 2+ can effectively assimilate the 250-400 nm band and transfer energy to Pr 3+ and Yb 3+ , causing them to emit stronger near-infrared spectra. These developed materials are capable of converting ultraviolet-visible photons into near-infrared photons matching the silicon bandgap, which reduces energy loss caused by spectral mismatch and has promising applications in silicon-based photovoltaics.
研究领域:
材料科学
·
光子学
·
无机非金属材料
·
能源材料
·
固体发光
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED MATERIALS
·
2025
·
IF 26.8
Juan Hui,Peng Ran,Yirong Su,Lurong Yang,Xuehui Xu,Tianyu Liu,Yuzhang Gu,Xiaojian She,Yang (Michael) Yang
Traditional energy-integration X-ray imaging systems rely on total X-ray intensity for image contrast, ignoring energy-specific information. Recently developed multilayer stacked scintillators have enabled multispectral, large-area flat-panel X-ray imaging (FPXI), enhancing material discrimination capabilities. However, increased layering can lead to mutual excitation, which may affect the accurate discrimination of X-ray energy. This issue is tackled by proposing a novel design strategy utilizing rare earth ions doped quantum-cutting scintillators as the top layer. These scintillators create new luminescence centers via energy transfer, resulting in a significantly larger absorption-emission shift, as well as the potential to double the photoluminescence quantum yield (PLQY) and enhance light output. To verify this concept, a three-layer stacked scintillator detector is developed using ytterbium ions (Yb 3+ )-doped CsPbCl 3 perovskite nanocrystals (PeNCs) as the top layer, which offers a high PLQY of over 100% and a significant absorption-emission shift of 570 nm. This configuration, CsAgCl 2 and Cs 3 Cu 2 I 5 as the middle and bottom layers, respectively, ensures non-overlapping optical absorption and radioluminescence (RL) emission spectra. By calculating the optimal thickness for each layer to absorb specific X-ray energies, the detector demonstrates distinct absorption differences across various energy bands, enhancing the identification of materials with similar densities.
研究领域:
医学影像学
·
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Photonics
·
2024
·Vol. 11
·期 6
·553
·
IF 2.1
Qi Nie,Wenqing Li,Xiao Luo
Quantum-cutting luminescent solar concentrators (QC-LSCs) have great potential to serve as large-area solar windows. These QC nanocrystals can realize a photoluminescence quantum yield (PLQY) of as high as 200% with virtually zero self-absorption loss. Based on our previous work, we have constructed a Monte Carlo simulation model that is suitable to simulate the performance of the QC-LSCs, which can take into account the band-edge emissions and near-infrared emissions of the QC-materials. Under ideal PLQY conditions, CsPbClxBr3−x:Yb3+-based LSCs can reach 12% of the size-independent external quantum efficiency (ηext). Even if LSCs have a certain scattering factor, the CsPbClxBr3−x:Yb3+-based LSCs can still obtain an ηextexceeding 6% in the window size (>1 m2). The flux gain (FG) of the CsPbClxBr3−x:Yb3+-based LSC-PV system can reach 14 in the window size, which is a very encouraging result.
研究领域:
材料科学
·
可再生能源
·
光子学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Advanced Optical Materials
·
2025
·
IF 7.2
Xiaolong Dong,Xin Zhao,Lifan Shen,Maosen Hu,Edwin Yue Bun Pun,Hai Lin
The construction of perovskite-based luminescent systems for multifunctional integrated platforms via reciprocal energy transfer (ET) cascades emerges as a central focus, but the material design and photophysical control remain a significant challenge. Herein, a strong power-dependent quantum yield behavior is observed in Cs 2 NaInCl 6 : Ho 3+ -Yb 3+ (CNIC: Ho-Yb) phosphors with ultra-low phonon energy, and quantified multiphoton upconversion (UC) efficiencies exhibit ultra-linear enhancement with the increasing excitation power, ensuring practical applicability for UC-based temperature sensing. Moreover, an efficient quantum cutting process is unveiled in the CNIC: Ho-Yb, where a single high-energy photon of Ho 3+ is converted into multiple NIR emissions of Yb 3+ via energy redistribution under 453 nm laser excitation, offering significant potential for enhancing near-infrared (NIR) imaging capability in biological tissues. To address the inherent structural and functional limitations of powder-based materials, the CNIC: Ho-Yb/polyacrylonitrile (CNIC: Ho-Yb/PAN) nanofibers are synthesized by electrospinning, and the functional integration platform based on the efficient bidirectional ET is built by coupling 453 and 980 nm lasers to enable selective applications in flexible thermal monitoring and NIR bioimaging. These findings enable next-generation flexible thermometry platforms with higher sensitivity, signal fidelity, and device-level applicability, while also paving the way for non-invasive and high-contrast deep-tissue imaging in biomedical diagnostics.
研究领域:
材料科学
·
光学物理
·
纳米技术
·
生物医学工程
·
发光
·
能量传递
·
传感器
·
生物成像
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）