JOURNAL OF LUMINESCENCE
·
2023
·
IF 3.6
Runfa Liu,Yue Pan,Jia Zhang,Xincui Zhuang,Yangbo Wang,Xufeng Zhou,Shanshan Du,Huaiyong Li,Wei Li
Ratiometric luminescence thermometry is awfully applicable for non-contact temperature detection. Lanthanide luminescent materials available for high-performance ratiometric thermometry are still highly desirable until now. Herein, two novel upconversion phosphors, Yb 3+ /Ho 3+ co-doped BiOF and BiF 3 microcrystals , were synthesized and investigated systematically in terms of their crystalline structure, room temperature and temperature-dependent upconversion properties. Under 980 nm laser excitation, both microcrystals bring forth the characteristic emissions of Ho 3+ , with an identical overall luminescent color of green, while the intensity is much higher in BiF 3 :Yb/Ho microcrystals. When increasing temperature, the upconversion intensity at various wavelengths for both microcrystals is reduced, meanwhile fluorescence intensity ratios of both 545/656 nm and 752/656 nm decrease highly regularly, establishing a ratiometric thermometry therefore. BiF 3 :Yb/Ho microcrystals were demonstrated to have significantly superior thermometric performance than BiOF:Yb/Ho, and a high relative sensitivity up to 5.41% K −1 as well as a wide temperature sensing range of 298–673 K were obtained.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
PHYSICA B-CONDENSED MATTER
·
2025
·
IF 2.8
Chen Fan,Xiangping Li,Yan Li,Jiani Luo,Lei Li,Hongquan Yu,Baojiu Chen
Bi 2 Mo 2 O 9 : Yb 3+ /Tm 3+ /Ho 3+ phosphors were synthesized via solid-state reaction method. Structural characterization confirmed phase purity and effective rare-earth incorporation into the host lattice. Under 980 nm excitation, the materials exhibited distinct emission bands corresponding to Tm 3+ (477 and 690 nm) and Ho 3+ (542 and 657 nm). Through optimization of Ho 3+ concentration (0.5 mol%), white-light upconversion emission was obtained with CIE 1931 coordinates of (0.3147, 0.2805). Using fluorescence intensity ratio technique based on non-thermally coupled energy levels of Tm 3+ ( 1 G 4 ) and Ho 3+ ( 5 F 5 ), it was found that the material had excellent temperature sensing performance, achieving maximum sensitivities of 21.74 %K −1 (absolute) and 1.892 %K −1 (relative). Remarkably, the material exhibits temperature-dependent chromaticity shifts from white (303 K) to yellow (483 K), enabling visual temperature indication. The findings demonstrate that Bi 2 Mo 2 O 9 : Yb 3+ /Tm 3+ /Ho 3+ phosphors exhibit promising prospects in optical thermometry and thermally-responsive luminescent devices, particularly in scenarios where thermally-driven color variations are advantageous or tolerable.
研究领域:
材料科学
·
光学物理
·
纳米技术
·
固态照明
·
温度传感
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2014
·Vol. 4
·期 107
·62802-62808
·
IF 3.708
Yan Song,Guixia Liu,Xiangting Dong,Jinxian Wang,Wensheng Yu,Jingmei Li
Bifunctional hybrid nanocomposites based on upconversion luminescence and photothermal properties have a wide range of application, especially biomedical diagnosis and therapy. Herein, the hybrid nanocomposites were prepared via combining NaYF4:Yb3+,Er3+/Ho3+ nanocrystals as shell layer materials and Au nanoparticles as the cores. The as-prepared nanocomposites can simultaneously take advantage of both the upconversion luminescence of NaYF4:Yb3+,Er3+/Ho3+ nanocrystals and the photothermal transduction property of Au nanoparticles. The structure, morphology and composition of the nanocomposites were confirmed by X-ray powder diffraction (XRD), transmission electron microscopy (TEM) and energy dispersive spectroscopy (EDS). In addition, the upconversion luminescence and photothermal transduction were evaluated. We observed an overlap between the absorption band of Au nanoparticles and the upconversion emission peaks of the Er3+/Ho3+ ions, and the luminescence resonance energy transfer (LRET) was studied and demonstrated. Under 980 nm laser irradiation, upconversion luminescence and efficient photothermal transduction of the hybrid nanocomposites were found. Moreover, the bifunctional nanocomposites also have shown excellent biocompatibility.
研究领域:
生物医学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Yanting Liu,Qiumei Li,Lili Meng,Qi Pang,Yanzhu Wang,Hua Yao,Qian Chen
Currently, lanthanide (Ln 3+ ) doped double perovskites (DPs) suffer from poor controllability of doping and the high concentration quenching phenomenon. Herein, a novel efficient energy transfer (ET) host of Cs 2 NaLuCl 6 Rare-earth-based (RE-based) DPs via Ag + /Bi 3+ co-doping for further Ho 3+ doping is developed. Benefiting from Ag + /Bi 3+ - manipulated the parity of the wavefunction of the self-trapped exciton, intense self-trapped excitons (STEs) broadband warm white visible emission is boosted. Specifically, photoluminescence quantum yield (PLQY) of co-doping with Bi 3+ and Ag + ions in Cs 2 NaLuCl 6 under 350 nm excitation is dramatically promoted to 86.19 % with half maximum (FWHM) of 224 nm. Although the pristine crystal Cs 2 NaLuCl 6 exhibits intrinsic blue emission with FWHM of 75 nm. Furthermore, the ET channel from STEs to Ho 3+ was constructed by tri-doping Ho 3+ , and the effective red and near-infrared (NIR) emission of Ho 3+ was obtained. Finally, NIR light-emitting diodes (LEDs) and white LED based on Ho 3+ doped/undoped Cs 2 Na 0.8 Ag 0.2 Lu 0.98 Bi 0.02 Cl 6 DPs were prepared with different application features. Specifically, white LEDs showed higher color rendering index and lower associated color temperature, while NIR LEDs showed good night vision imaging. This work provides a new strategy for the design of an ET host suitable for Ln 3+ doping, avoiding the effects of the concentration quenching phenomenon that always occurs in heavily doped hosts and realizing controllable doping.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2023
·
IF 3.6
Chuncheng Zhang,Lijie Cao,Chao Yun
Ho 3+ /Yb 3+ co-doped tellurite glasses were synthesized through the use of the conventional melt-quenching method in this paper. Under the excitation of 980 nm LD , an intense and broad 4.1 μm mid-infrared fluorescence of the wavelength range from 3600 to 4400 nm with the full width at half maxima (FWHM) of the fabricated glasses about 343 nm were obtained, which have potential applications in the field of wide band mid-infrared lasers. Meanwhile, strong 2.9 μm mid-infrared emission (2730–3030 nm) was observed with the FWHM of 109 nm and the calculated maximum gain coefficient reach to 2.16 cm −1 around 2843 nm. The intense visible up-conversion emission bands center at 551, 662 and 753 nm, near-infrared fluorescence emissions around 1.2 and 2.0 μm were observed in the synthetic tellurite glasses. Under the different concentration of Yb 2 O 3 , a series of luminescence properties were detailed researched. In addition, the energy transfer mechanism was discussed according to the emission spectra and the fluorescence lifetime value of the change trend. These findings demonstrate that the synthesized Ho 3+ /Yb 3+ co-doped tellurite glasses exhibit excellent fluorescence properties for mid-infrared laser materials.
研究领域:
光学材料
·
光电子学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF NON-CRYSTALLINE SOLIDS
·
2023
·
IF 3.5
Yichen Ye,Yongbao Xiao,Yao Ji,Weichao Wang
Singly Ho 3+ -doped TeO 2 –Ta 2 O 5 –ZnO (TTZ) glass and optical fiber for 2 μm fiber lasers have been investigated. The glass-forming region of the ternary TTZ glass system is determined to study its glass-forming ability and to select an appropriate glass matrix for doping Ho 3+ ions. Upon the excitation of a 1940 nm laser diode (LD), an intense emission at 2.06 μm with a full width at half maximum (FWHM) of 61 nm is observed from the Ho 3+ -doped TTZ glass. The measured lifetime of the Ho 3+ : 5 I 7 level in TTZ glass shows a gradual decrease from 3.5 to 0.98 ms as the dopant concentrations increase from 0.2 to 2 mol%. A large emission cross-section (σ e MC ∼ 4.56 × 10 −21 cm 2 ) and figure of merit (FOM, ∼ 6.83 × 10 −24 cm 2 ·s) are obtained. The Ho 3+ -doped TTZ glass is further fabricated into an optical fiber with an average transmission loss of 0.12 dB/cm at 1310 nm. The results show that singly Ho 3+ -doped TTZ glass and optical fiber are promising candidates for efficient 2 μm fiber lasers.
研究领域:
光学
·
材料科学
·
光子学
✓ 已验证
DOI
高影响因子
Nanoscale Research Letters
·
2018
·Vol. 13
·期 1
·1-8
·
IF 3.125
Zhang Zhenlong,Li Danna,Shi Wenjia,Liu Yanyan,Zhang Yan,Liu Yuefeng,Gao Huiping,Mao Yanli
A new up-conversion nanomaterial of Ho 3+ -Yb 3+ -Mg 2+ tri-doped TiO 2 (UC-Mg-TiO 2 ) was designed and synthesized with a sol-gel method. The UC-Mg-TiO 2 presented enhanced up-conversion fluorescence by an addition of Mg 2+ . The UC-Mg-TiO 2 was utilized to fabricate perovskite solar cells by forming a thin layer on the electron transfer layer. The results display that the power conversion efficiency of the solar cells based on the electron transfer layer with UC-Mg-TiO 2 is improved to 16.3 from 15.2% for those without UC-Mg-TiO 2 . It is demonstrated that the synthesized UC-Mg-TiO 2 can convert the near-infrared light to visible light that perovskite film can absorb to improve the power conversion efficiency of the devices.
研究领域:
材料科学
·
能源科学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CRYSTENGCOMM
·
2022
·Vol. 24
·期 34
·6001-6008
·
IF 3.756
Heyan Wu,Yunhao Liang,Yue Ma,Jun Yang,Shanshan Hu
This work begins with a study of the synthesis of multi-color luminescence phosphors, which is followed by a discussion of the temperature sensitivity of AgBi(MoO4)2:Yb3+/Er3+. Uniform and approximately spherical particles of AgBi(MoO4)2-based phosphors were prepared by a simple one-step hydrothermal method without adding any surfactant. We obtained a series of rich green, yellow, blue, and white luminescence phosphors by doping Ln3+ (Ln3+ = Yb3+, Er3+, Ho3+, Tm3+) into the AgBi(MoO4)2 matrix, and an analysis of various correlative factors was made, especially for the amounts of doping ions. Furthermore, the investigation of the temperature sensitivity of AgBi(MoO4)2:Yb3+/Er3+ revealed that the fluorescence intensity becomes lower with increasing temperature from 323 to 573 K. The fluorescence intensity ratio (FIR) of the two thermal coupling energy levels (2H11/2, 4S3/2) of Er3+ was calculated, and the absolute sensitivity of the obtained phosphor reached a maximum value of 1.32% K−1 at 463 K, as obtained by fitting the FIR as a function of temperature, which is a relatively high level compared with other related materials. This material is expected to be used as a highly sensitive FIR thermometer.
研究领域:
材料科学
·
光学
·
发光材料
·
温度传感
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2018
·
IF 4.439
Ziyu Chen,Guixia Liu,Jingting Sui,Dan Li,Yan Song,Feng Hong,Xiangting Dong,Jinxian Wang,Wensheng Yu
Photothermal therapy (PTT) guided by bioimaging has attracted much attention. Recently, the multifunctional nanomaterials with multimodal imaging and high-performance therapy effect are extremely important. In this work, a novel nanostructure with Ag nanospheres (NSs) encapsulated Polyvinylpyrrolidone (PVP) film which decorated by Ba 2 GdF 7 :Yb 3+ , Ho 3+ nanoparticles is synthesized by a simple method. The novel nanostructure endows the NCs remarkable originality and excellent multifunctional performance. The morphology, structure, optical properties, biocompatibility, cytotoxicity, superparamagnetic properties and photothermal therapeutic efficiency of the Ag@PVP-Ba 2 GdF 7 :Yb 3+ , Ho 3+ nanocomposites (NCs) are investigated. The results show that Ag@PVP-Ba 2 GdF 7 :Yb 3+ , Ho 3+ NCs possess good upconversion luminescence (UCL) performance and X-ray computed tomography (CT) imaging ability. Furthermore, in MTT cytotoxicity measurement, the NCs exhibit low cytotoxicity and excellent biocompatibility. Moreover, the PVP film coating of the NCs can largely promote the stability. In addition, outstanding photothermal conversion ability and stability are also obtained upon NIR laser irradiation. Utilizing the prominent photothermal effect, PTT in vitro shows efficient photothermal killing effect on tumor cells. Therefore, Ag@PVP-Ba 2 GdF 7 :Yb 3+ , Ho 3+ NCs from multifaceted research provides a break to multifunctional nanomaterials for multimodal imaging detection and high-performance tumor photothermal therapy.
研究领域:
生物医学工程
·
纳米医学
·
肿瘤学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2024
·
IF 3.3
Hang Liu,Zhi Ye,Ding Sun,Lixin Zhang,Xueyan Lv,Wentong Cai,Yuhong Zhang
Rear earth(RE)-doped halide perovskite has generated as an amazing optical material for multicolor luminescence. Free-lead halide double perovskites have attracted interesting because of their non-toxicity and higher instability. Here, RE 3+ doped chloride-based double perovskite phosphors are reported. A series of heavy concentration Ho 3+ /Yb 3+ doped Cs 2 NaBiCl 6 (CNBC) phosphors are prepared with a solvothermal route. The band structure of CNBC is calculated through density functional theory (DFT). The luminescence properties of CNBC:Ho 3+ and CNBC:Ho 3+ /Yb 3+ are investigated through upconversion(UC) and downshifting(DS) processes. From CNBC:Ho 3+ , the brightness orange, deep red and pale green lights are achieved under excitation at 365, 452 and 980 nm. The multicolor emissions of CNBC:Ho 3+ are used to multimode fluorescent anti-counterfeiting. Comparing with CNBC:Ho 3+ samples, the UC emission intensity of CNBC:Ho 3+ /Yb 3+ are dramatically enhanced. The brightness green light can be seen by naked eyes under super lower power pumping(∼10 mW). The temperature sensing properties of CNBC:Ho 3+ /Yb 3+ phosphor are investigated systematically based on the luminescence intensity ratio(LIR) of thermally coupled levels(TCLs)( 5 F 1 / 5 G 6 , 5 F 2,3 / 3 K 8 ) and non-TCLs( 5 F 4 / 5 S 2 , 5 F 5 ). The maximum relative sensitivity(S R ) reaches 5.089% K −1 at 293 K according to the LIR of non-TCLs. The work will broaden the application field of RE 3+ -doped free-lead perovskite such as anti-counterfeiting and thermometry.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2023
·
IF 3.1
Aihua Zhou,Jiaxin Yang,Yan Li,Chengguo Ming,Yuanxue Cai,Yumiao Pei
Luminescence thermometry has recently been gaining popularity in science and technology fields. However, most reported works have used the fluorescence intensity ratio (FIR) to obtain the temperature based on thermally coupled energy levels (TCLs), which have hindered the sensitivity of the technique and limited its applications. Here, NaYF4:Yb/Tm@NaYF4:Yb/Ho microcrystals were prepared using a hydrothermal method. Based on the non-thermally coupled energy levels (NTCLs) of the double luminescent ionic centers Tm3+ and Ho3+, the materials exhibited temperature-dependent luminescence in the range of 304 K to 574 K. The maximum sensitivities were found to be Sa = 0.135 K−1 at 574 K and Sr = 1.101% K−1 at 484 K based on red (Tm3+) and green (Ho3+) emission bands. This study has provided a promising new strategy to break the TCL restriction and has shown the material to have potential applications in luminescence thermometry.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale
·
2023
·Vol. 15
·期 26
·11179-11189
·
IF 6.7
Zhenlong Cheng,Mingzhou Meng,Jiaoyu Wang,Zhuoyue Li,Jiao He,Hao Liang,Xin Qiao,Yuanli Liu,Jun Ou
Non-contact optical temperature sensors are highly sought after by researchers due to their satisfactory temperature resolution (δ(T) < 0.1 °C), high relative thermal sensitivity (Sr > 1% °C−1), fast temporal response (t < 0.1 s), and long-term optical stability. In this study, NaYF4:Yb3+/Ho3+/Tm3+ upconversion nanoparticles were prepared by a solvothermal method, and their crystal structure, microscopic morphology, and luminescence mechanism, together with the temperature sensing properties of the specimens, were investigated. Under 980 nm laser excitation, the specimens exhibited strong upconversion luminescence, and the emission peaks corresponded to the characteristic energy level jumps of Ho3+ and Tm3+, respectively. The temperature-dependent luminescence spectra of the samples were investigated based on the fluorescence intensity ratio (FIR) technique over a temperature gradient of 295–495 K. The samples are based on thermally coupled energy levels (TCLs: 1G4(1,2) → 3H6(Tm3+)) and non-thermally coupled energy levels (NTCLs: 3F3 → 3H6(Tm3+) and 5F3 → 5I8(Ho3+), 3F3 → 3H6(Tm3+) and 1G4 → 3H6(Tm3+), 3F3 → 3H6(Tm3+) and 5F5 → 5I8(Ho3+), 3F3 → 3H6(Tm3+) and 5F4 → 5I8(Ho3+)) for temperature sensing performance. The maximum absolute sensitivity (Sa), relative sensitivity (Sr), and minimum temperature resolution δ(T) were found to be 0.0126 K−1 (495 K), 1.7966% K−1 (345 K), and 0.0167 K, respectively, which are better than those of most sensing materials, and the simultaneous action of multiple coupling energy levels can further improve the temperature precision. This study indicates that the sample has a good value for optical temperature measurement and also provides new ideas for the exploration of other high-quality optical temperature sensing materials.
研究领域:
材料科学
·
光学
·
纳米技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）