JOURNAL OF LUMINESCENCE
·
2023
·
IF 3.6
Shiying Tan,Xusheng Wang,Yan Zhao,Yanxia Li,Xi Yao
Rare earth doped upconversion luminescent materials have the advantages of low toxicity, high chemical stability, excellent photostability, narrow emission band, and long luminescent life, but their low fluorescence quantum efficiency restricts their practical application in the field of temperature sensing. In this paper, Er 3+ doped KYb(MoO 4 ) 2 (KYM) phosphors were synthesized by a temperature solid state reaction method. When the doped concentration is 5 mol%, the luminescence intensity get its strongest value. On this basis, 2 mol% trivalent ions Gd 3+ , La 3+ and Y 3+ (R 3+ ) were doped respectively, and the luminescence intensity increased by about 2 times. By the fluorescence intensity ratio technique, the KYM:5Er phosphor has the maximum absolute temperature sensitivity of 0.0106 K -1 . By codoping 2 mol% Gd 3+ in KYM:5Er, the upper limit of temperature measurement increased from 513 K to 663 K, which shows that Er 3+ -doped and Er 3+ /R 3+ -codoped KYM have the potential as temperature sensors .
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
KEY ENGINEERING MATERIALS
·
2013
·
IF 0
Meng Wang,Ming Hao Fang,Chao Tang,Zhao Hui Huang,Yang Ai Liu,Xiao Wen Wu
Er3+ doped ZnO-TiO2 nanofibers with diameter of 100～200 nm were prepared by electrospinning mothed after calcined at high temperature, using polyvinylpyrrolidone(PVP), Zn(NO3)2·6H2O, Er(NO3)3·5H2O, Ti(OC4H9)4 as raw materials. The composite nanofibers were characterized by XRD, SEM, and UV-V respectively. Effects of different calcined temperatures on structure and photocatalytic degradation were investigated. The results indicated that the crystallinity becomes better with the increasing of calcination temperature. The composite nanofibers had the best effects of photocatalytic degradation of methylene blue, when Er3+ doping content was 0.3 wt.% and calcined temperature was 500 °C.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
RSC Advances
·
2019
·Vol. 9
·期 13
·7189-7195
·
IF 3.049
Weiguang Ran,Hyeon Mi Noh,Sung Heum Park,Bo Ram Lee,Jung Hwan Kim,Jung Hyun Jeong,Jinsheng Shi,Guangzeng Liu
Realization of simultaneous, efficient bifunctional application of thermochromic phosphors on light emitting diodes (LEDs) and as ratiometric thermometers is significant. Herein, doped Er3+ ions are introduced as an activator into double perovskite LiLaMgWO6 host lattice. The developed phosphors can be efficiently excited by a near-ultraviolet LED chip and show bright green emission, mainly at 527 and 543 nm, as well as very low thermal quenching. Their chemical stability is studied, demonstrating excellent application potentials. Furthermore, the temperature sensing properties of LiLaMgWO6:0.01Er3+ were analyzed in the wide range of 303–483 K and show a good exponential relationship between ratiometric intensity and temperature (R2 > 0.999), as well as high sensitivity (2.24% K−1). Such a system not only optimizes the performance in solid light emitting but also provides an excellent platform for designing high-sensitivity optical thermometry.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF LUMINESCENCE
·
2018
·
IF 2.732
Jun Liu,Huawei Deng,Fengzhen Lv,Wenjie Kong,Dihu Chen,Fuchi Liu,Lizhen Long
The large number of energy levels available to lanthanide ions makes the emission mechanism of lanthanide-doped luminescent materials extremely complicated. Herein, we focus on the discussion and analysis of luminescence manipulation in Gd 2 O 3 :Yb 3+ /Er 3+ nanocrystals and systematically investigate ion-ion interaction–induced energy transfer in up- and downconversion processes to shed light on the manipulation mechanism, showing that the luminescence of the above nanocrystals can be controlled by varying the content of Yb 3+ . Based on Dexter's energy transfer theory and the fact that excitation of Er 3+ ions results in the appearance of emission attributed to the 2 F 5/2 → 2 F 7/2 transition of Yb 3+ in the near-infrared region (950–1100 nm), this behavior is ascribed to the occurrence of energy transfer from Er 3+ to Yb 3+ .
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2024
·
IF 5.7
Zhurong Mo,Hongli Wen,Xin Gao,Chonge Ta,Zhongfei Mu,E. A. Dawi,Deshmukh Abdul Hakeem
Fluorescence thermometry is extensively utilized in many fields owing to its high efficiency and accuracy of detection. The fluorescence intensity ratio (FIR) using thermally coupled energy states of Er3+ is a promising route to produce thermometers with high spatial resolution and rapid response. Herein, Y2−xLaCaGa3ZrO12:xEr3+ and Y1.92−yLaCaGa3ZrO12:0.08Er3+, yYb3+ phosphors were synthesized using a solid-state reaction method. Their crystal structure, dual mode luminescence and potential for down-conversion (DC) temperature sensing application were investigated. With an increase in the Yb3+ ion concentration, the DC luminescence of Y1.92−yLaCaGa3ZrO12:0.08Er3+, yYb3+ (0.05 ≤ y ≤ 0.5) phosphors under 374 nm excitation was significantly decreased, suggesting an efficient Er3+ → Yb3+ energy transfer (ET), which was supported by decay lifetime analysis and varified via calculating ET efficiency that significantly increased from 20% to 67%. Moreover, the temperature-dependent DC emission spectra (in the 78–525 K range) and their temperature-sensing properties (absolute and relative sensitivities) were evaluated using FIR technique. The highest SA (0.001825 K−1) and SR (2.939% K−1) for Y1.92LaCaGa3ZrO12:0.08Er3+ were obtained at 425 K and 200 K, respectively. Conversely, for Y1.72LaCaGa3ZrO12:0.08Er3+, 0.2Yb3+, even with a lower SA (0.001582 K−1 at 500 K), the SR value was enhanced significantly to 1209/T2 (200–300 K) and 990.7/T2 (300–525 K) from 1175/T2 (200–300 K) and 883.1/T2 (300–525 K), respectively, for Y1.92LaCaGa3ZrO12:0.08Er3+. The highest SR was observed to be 2.939 and 3.023% K−1 for Y1.92LaCaGa3ZrO12:0.08Er3+ and Y1.72LaCaGa3ZrO12:0.08Er3+, 0.2Yb3+ thermometers, at 200 K with the lowest thermal resolution of 0.17 and 0.16, respectively, which is quite high as compared to the other reported thermometers. Therefore, we believe that the phosphors under investigation are promising candidates for non-contact mode temperature sensing application.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale
·
2017
·Vol. 9
·期 47
·18940-18950
·
IF 7.367
Huabin Chen,Wenxia Liu,Bin Hu,Zhuozhuo Qin,Hong Liu
The development of full-spectrum photocatalysts active in the near-infrared (NIR) region has gained increasing attention in the photodegradation of organic pollutants. Herein, we designed a full-spectrum photocatalyst with strong NIR photoactivity based on the synergy of Er3+-doped ZnO-CuO-ZnAl2O4 multi-phase oxides (Er3+-doped Zn/Cu/Al-MPO) via the formation of n–p–n double heterojunctions. The photocatalyst was prepared by synthesizing nanosheets of a Zn/Cu/Al/Er hydrotalcite-like compound (Zn/Cu/Al/Er-HLC) with a co-precipitation method followed by calcination of the nanosheets at 800 °C. The as-prepared Er3+-doped Zn/Cu/Al-MPO inherits the nanosheet morphology of Zn/Cu/Al/Er-HLC, and displays over-doubled photoactivity in the entire ultraviolet (UV), visible and NIR regions compared to undoped Zn/Cu/Al-MPO. The excellent photocatalytic activity of Er3+-doped Zn/Cu/Al-MPO, especially its strong NIR photoactivity, is ascribed to its Er3+-doped CuO-involved multi-crystalline phase heterostructure, i.e., n–p–n double heterojunctions, which does not only offer an enhanced NIR absorption but also promotes the separation of photogenerated charge carriers. Importantly, the synergy of all the parts of the n–p–n double heterojuctions plays an important role in interface band structure regulation for the enhancement of the photocatalytic properties of Er3+-doped Zn/Cu/Al-MPO. This work has demonstrated the feasibility of utilizing hydrotalcite-like precursors in the design of full-spectrum photocatalysts active in the NIR region.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
OPTICAL MATERIALS
·
2017
·
IF 2.238
Jianjian Sun,Bijun Fang,Shuai Zhang,Zhihui Chen,Jianning Ding,Xiangyong Zhao,Haosu Luo
Er 3+ -doped Na 0.5 Bi 0.5 TiO 3 (Er-doped NBT) ceramics were prepared via a hydrothermal method . High sintering active Er-doped NBT nano cubic particles with perovskite structure were synthesized at hydrothermal condition of 200 °C for 24 h in 12 M NaOH solution, which were self-assembled via in situ crystallization mechanism by the initially as-grown nanowires. The Er-doped NBT ceramics sintered at 1100 °C for 2 h exhibit pure rhombohedral perovskite structure, high densification and rather homogenous microstructure morphology. Under 488 nm light excitation , the strong green emission peaks centering at 530 nm and 550 nm and the weak red emission peaks locating at 665 nm and 735 nm are excited, which can be attributed to the 2 H 11/2 , 4 S 3/2 , 4 F 9/2 and 4 I 9/2 → 4 I 15/2 transitions, respectively. The maximum emission intensity is obtained when the Er doping content reaches 1.0 mol%. A strong upconversion emission peak centering around 550 nm in green light range is excited under 800 nm light excitation, which is correlated with the 4 S 3/2 → 4 I 15/2 transition.
研究领域:
材料科学
·
无机非金属材料
·
功能陶瓷
·
光电子学
·
固体化学
✓ 已验证
DOI
高影响因子
OPTIK
·
2021
·
IF 2.443
Xiangyan Yun,Jun Zhou,Yaohui Zhu,Xiong Li,Yetong Jia,Denghui Xu
A novel series of Er 3+ doped LiYbW 2 O 8 phosphors were synthesized by high-temperature solid-state process. Upon 980 nm NIR laser excitation , the up-conversion emission spectra show that the intense green emissions and weak red emissions can be proposed as the transitions of 2 H 11/2 → 4 I 15/2 , 4 S 3/2 → 4 I 15/2 , 4 F 9/2(2) → 4 I 15/2 and 4 F 9/2(1) → 4 I 15/2 of Er 3+ ions, respectively. The optical temperature sensing properties were carefully investigated on the basis of fluorescence intensity ratio (FIR) technology about energy level transitions of 2 H 11/2 → 4 I 15/2 and 4 S 3/2 → 4 I 15/2 in the range from 300 K to 500 K. Moreover, the maximum values of relative sensitivity ( S r ) and absolute sensitivity ( S a ) are separately about 1.62% K −1 at 300 K and 0.64% K −1 at 500 K, which can prove that the sensitivity of LiYbW 2 O 8 :Er 3+ is superior to the latest reported materials for temperature sensors . Results evidence that the Er 3+ doped LiYbW 2 O 8 phosphors can be outstanding candidates for optical temperature sensors with high S r and S a .
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2021
·
IF 3.498
Jinsheng Liao,Minghua Wang,Zhuo Han,Junxiang Huang,Guoliang Gong,Junxiang Fu,He-rui Wen
A new far-red/green dual-emitting phosphor La 2 ZnTiO 6 :Mn 4+ /Er 3+ (LZT:Mn 4+ /Er 3+ ) was successfully synthesized by the sol-gel method. Under 381 nm excitation, LZT:Mn 4+ /Er 3+ phosphor shows the strong far-red emission peak of 709 nm (Mn 4+ : 2 E g → 4 A 2g ) and weak green emission peak of 523/548 nm (Er 3+ : 2 H 11/2 / 4 S 3/2 → 4 I 15/2 ), which consistent with the requirement of plant growth for far-red and green light. A 1.5-fold enhancement of far-red emission intensity is found in LZT:Mn 4+ /Er 3+ phosphor compared with the Mn 4+ singly-doped counterparts. Moreover, the relative emission intensity of far-red and green can be easily controlled by changing temperature. Utilizing the optimal LZT:0.2%Mn 4+ /2%Er 3+ phosphor as plant lighting, a prototype near-UV-pumped LED device was fabricated. Upon 120 mA driving current, it demonstrated far-red/green dual emission. All the results indicated that the LZT:Mn 4+ /Er 3+ phosphor is a potential material for plant growth illumination with far-red/green light.
研究领域:
材料科学
·
植物学
✓ 已验证
产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2024
·Vol. 26
·期 24
·3194-3205
·
IF 2.6
Huimin Du,Yanyang Li,Mengran Ouyang,Meifang Liu,Shanshan Hu,Jun Yang
Yb3+/Er3+-doped Bi2(MoO4)3−z(WO4)z phosphors were synthesized via a hydrothermal method combined with subsequent calcination. Under the excitation of a light source of 980 nm, Bi2(MoO4)3:Yb3+/Er3+ phosphors exhibited strong upconversion green light and weak red light emissions. By doping WO42− in Bi2(MoO4)3:Yb3+/Er3+ phosphors, the upconversion luminescence intensity of the phosphors significantly enhanced, which is 42 times higher than that of the undoped WO42− phosphor. With an increase in WO42− doping content, the final color coordinates of Bi2(MoO4)3−z(WO4)z:Yb3+/Er3+ phosphors were (0.2352, 0.7274), which is closer to the standard green CIE coordinates. The maximum CP of WO42−-doped phosphors is as high as 116.68%, which is 74.44% higher than that of the undoped WO42− phosphor. Based on the thermally coupled energy levels (TCLs) of Er3+ (2H11/2/4S3/2 → 4I15/2) in Bi2(MoO4)2.7(WO4)0.3:14%Yb3+,3%Er3+ phosphor, the SR value reached a maximum of 0.0081 K−1 at 323 K and the SA value reached a maximum of 0.0099 K−1 at 398 K. The obtained Bi2(MoO4)3−z(WO4)z:Yb3+/Er3+ phosphors are suitable for upconversion luminescent materials for green displays and have potential advantages in optical temperature measurement.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2015
·
IF 2.259
Xiaowen Zhang,Zhi Chen,Jianrong Qiu
Near infrared to visible up-conversion luminescence in Er 3+ single doped BaCl 2 , BaF 2 and NaYF 4 phosphors were compared. Intense blue emission at 410 nm due to 2 H 9/2 → 4 I 15/2 transition and greenish-blue emission at 496 nm due to 4 F 7/2 → 4 I 15/2 transition were only observed in BaCl 2 :Er 3+ when excited by 808 nm and 976 nm laser diodes , respectively. The phenomena can be ascribed to the direct two-step excitation processes which occur in the chlorides where multiphonon relaxation is rapidly suppressed. In addition, the intensity of upconversion emission in BaCl 2 :Er 3+ is greatly enhanced upon broadband near-infrared excitation.
研究领域:
材料科学
·
光学材料
·
无机化学
·
发光物理
·
纳米生物技术
✓ 已验证
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2018
·
IF 2.21
Hanyu Yao,Honglie Shen,Quntao Tang,Jiaqi Peng,Rui Liu
The fluorescence-based temperature sensor using temperature-dependent fluorescence properties is a great candidate to replace traditional temperature-measurement detector like thermocouple , because the latter is inaccessible to conquer some special circumstances such as a corrosive environment. In this study, the nano-sized Er 3+ doped NaY(WO 4 ) 2 phosphors were synthesized by solvothermal method. The origins of three emission peaks located at 527 nm, 549 nm and 665 nm were identified. The 2 H 11/2 → 4 I 15/2 (green emission 1) and 4 S 3/2 → 4 I 15/2 (green emission 2) transitions of the Er 3+ ion possessed a temperature dependent behavior over the range of 300–30 K and it was proposed for temperature sensing (optical thermometry) using the fluorescence intensity ratio (FIR) method. The FIR value of nano-sized phosphors decreased with the decrease of temperature, and the experimental data were well fitted with a theoretical function. A large energy difference (1048.5) was obtained from the fitting curve, which indicate that the sensitivity of nano-sized NaY(WO 4 ) 2 : Er is higher than that of micro-sized one prepared by high temperature solid state reaction. Particularly, at temperatures below 150 K, the sensitivity of nano-sized UC phosphors was enhanced obviously. The results suggested that this nano-sized phosphor could be a splendid option for next generation luminescence-based temperature sensing devices in cryogenic region.
研究领域:
材料科学
·
光学
·
传感器技术
✓ 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）