JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
·
2018
·
IF 2.207
Renping Cao,Guanjun Quan,Zhihui Shi,Ting Chen,Zhiyang Luo,Guotai Zheng,Zuofu Hu
La 2 Zr 2 O 7 :R (R = Sm 3+ , Bi 3+ , Sm 3+ /Bi 3+ ) phosphors are synthesized by solid-state reaction method in air. Blue emission band peaking at ∼462 nm of La 2 Zr 2 O 7 :Bi 3+ phosphor with excitation at 312 nm is observed in the range of 370–610 nm due to 3 P 1 → 1 S 0 transition of Bi 3+ ion and D → 1 S 0 transition between Bi 3+ and Zr 4+ ions. La 2 Zr 2 O 7 :Sm 3+ phosphor with excitation at 407 nm shows reddish orange light in the range of 550–750 nm owing to 4 G 5/2 → 6 H J ( J = 5/2, 7/2, 9/2, and 11/2) transitions of Sm 3+ ion. Tunable emission from blue to white of La 2 Zr 2 O 7 :Sm 3+ , Bi 3+ phosphor with excitation at 312 nm can be observed due to the changing Bi 3+ or Sm 3+ ion concentration . La 2 Zr 2 O 7 :Sm 3+ , Bi 3+ phosphor with excitation at 407 nm only emits reddish orange because Bi 3+ has no absorption at 407 nm. The energy transfer from Bi 3+ to Sm 3+ is discussed. The luminous mechanism is explained by the energy level diagrams of Bi 3+ and Sm 3+ ions.
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 LUMINESCENCE
·
2020
·
IF 3.28
Renping Cao,Yuan Ren,Ting Chen,Wenhao Wang,Qingdong Guo,Qianglin Hu,Chenxing Liao,Ting Fan
A series of SrZrSi 2 O 7 :R (R = Sm 3+ , Bi 3+ , Bi 3+ /Sm 3+ ) phosphors are synthesized successfully in air via high temperature solid-state reaction method. The crystal structure, lifetime, energy transfer (ET) process, and luminescence properties of samples are investigated in detail. Host SrZrSi 2 O 7 with excitation at 300 nm ultraviolet (UV) light emits blue light due to the Zr 4+ - O 2− transition inside [ZrO 6 ] group. SrZrSi 2 O 7 :Bi 3+ phosphor with excitation at 315 nm UV light emits blue light owing to the 3 P 0,1 → 1 S 0 transitions of Bi 3+ ion. SrZrSi 2 O 7 :Sm 3+ and SrZrSi 2 O 7 :Sm 3+ , Bi 3+ phosphors with excitation at 300 nm UV light show a tunable emission due to ET process from [ZrO 6 ] to Sm 3+ and from Bi 3+ to Sm 3+ , respectively, and they only emit red-orange light under excitation 407 nm because of the 4 G 5/2 → 6 H 5/2 , 6 H 7/2 , 6 H 9/2 , and 6 H 11/2 transitions of Sm 3+ ion. The optimal concentrations of Sm 3+ and Bi 3+ ions are ~6 and 4 mol%, respectively. The lifetime of SrZrSi 2 O 7 :Sm 3+ phosphor decreases from 1.127 ms to 0.897 ms with increasing Sm 3+ concentration in the range of 2–12 mol%, and that of SrZrSi 2 O 7 :6%Sm 3+ , Bi 3+ phosphor decreases from 1.005 ms to 0.948 ms with increasing Bi 3+ concentration in the range of 1–8 mol%. The luminous mechanisms of samples are explained by the energy level diagram. The experimental results are helpful for the luminescence improvement and emission adjustion of other Sm 3+ -doped phosphors.
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
·
2016
·
IF 2.101
Renping Cao,Guo Chen,Xiaoguang Yu,Pengjie Tang,Zhiyang Luo,Siling Guo,Guotai Zheng
Ca [1−3x/2] TiO 3 :xSm 3+ (0 ≤ x ≤ 5 mol%), Ca 0.955 TiO 3 :0.03Sm 3+ + 10 mol% H 3 BO 3 , Ca 0.94 TiO 3 :0.03Sm 3+ , 0.03Na + phosphors are synthesized by high temperature solid–state reaction method in air. All samples are pure phase CaTiO 3 . Two strong excitation bands within the range 400–435 nm and 455–510 nm are observed, which are nicely match with widely applied near-UV (400–430 nm) and blue (460–500 nm) LED chips. The strongest emission band peaking at ∼603 nm is assigned to the 4 G 5/2 → 6 H 7/2 transition of Sm 3+ ion. The optimal Sm 3+ doping concentration is ∼3 mol%. Fluorescent lifetimes of Ca 0.955 TiO 3 :0.03Sm 3+ phosphor with excitation 408, 467, and 481 nm are ∼0.809 m, 0.792 m, and 0.8 m, respectively. The PL intensity of Ca 0.955 TiO 3 :0.03Sm 3+ phosphor is enhanced 5–7 times after Na + ion is codoped as charge compensator and H 3 BO 3 is added as flux, and their CIE chromaticity coordinate is ∼ (0.5792, 0.4199). The experiment results are helpful to improve luminescence properties of other Sm 3+ -doped phosphors and study novel phosphors.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2015
·
IF 1.981
Fangchao Liu,Qun Han,Tiegen Liu,Yunzhi Yao,Yaofei Chen,Yang Du
Sm 3+ -doped oxy-fluoride (OFSm) powders are prepared by the melt quenching technique and characterized using FE-SEM, optical absorption and emission techniques. Spectroscopic properties of Sm 3+ -doped oxy-fluoride powders with different Sm 3+ concentration and sintering temperature are presented and discussed by using the absorption, emission measurements. The Judd–Ofelt intensity (J–O) parameters ( Ω λ , where λ = 2, 4 and 6), measured from the experimental oscillator strengths of the absorption spectra , are used to evaluate the radiative parameters of the fluorescence transitions. Intense orange emission can be obtained when excited with 325 nm wavelength by increasing the sintering temperature to 1400 °C. Ratio of fluorescence intensities arising from the two closing lying 4 F 3/2 and 4 G 5/2 levels is studied, concentration quenching has been noticed beyond 2 mol% of Sm 3+ ions concentration . The excellent spectroscopic properties along with the outstanding thermal stability suggest that the OFSm03 powders may become an attractive laser material to exhibit efficient visible lasing emission in the orange spectral region.
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 ELECTRONIC MATERIALS
·
2016
·Vol. 45
·期 7
·3361-3366
·
IF 1.491
Cao Renping,Han Peng,Luo Wenjie,Fu Ting,Luo
Zhiyang,Liu Pan,Chen Zhiquan,Yu Xiaoguang
Novel CaZrO 3 :Sm 3+ , Bi 3+ phosphor is synthesized by a solid-state reaction method in air and the crystal structures and luminescence properties are investigated. The emission spectrum with excitation 308 nm contains emission of Sm 3+ and Bi 3+ ions at the same time; however, it only has an emission of Sm 3+ ion with excitation 408 nm. Emission intensity of CaZrO 3 :Sm 3+ phosphor can be enhanced about four times owing to energy transfer from the Bi 3+ ion to the Sm 3+ ion and with the fluxing agent role of Bi 3+ ion when Bi 3+ ion is co-doped. The possible luminous mechanism is analyzed by energy level diagrams of Bi 3+ and Sm 3+ ions and the energy transfer process in CaZrO 3 :Sm 3+ , Bi 3+ phosphor. The experimental results indicate that, hopefully, CaZrO 3 :Sm 3+ , Bi 3+ phosphor can be used as a reddish orange phosphor candidate for white light-emitting diodes based on near an ultraviolet (~408 nm) chip.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2016
·
IF 2.435
Renping Cao,Haidong Xu,Wenjie Luo,Zhiyang Luo,Siling Guo,Fen Xiao,Hui Ao
Novel Ca 2 MgWO 6 :Sm 3+ , Bi 3+ phosphor is synthesized by solid-state reaction method in air. Host Ca 2 MgWO 6 with excitation 300 nm emits blue light. Ca 2 MgWO 6 :Bi 3+ phosphor with excitation 300 and 338 nm emits yellow light. Ca 2 MgWO 6 :Sm 3+ phosphor with excitation 300 nm exhibits tunable emission from blue to red light by increasing Sm 3+ doping concentration from 0 to 8 mol%, however, only emits red light with excitation 407 nm. Ca 2 MgWO 6 :Sm 3+ , Bi 3+ phosphor with excitation 300 and 338 nm emits red light. The optimal Sm 3+ doping concentration is ∼5 mol% in Ca 2 MgWO 6 :Sm 3+ phosphor. After Bi 3+ ion is co-doped, luminescence properties of Ca 2 MgWO 6 :Sm 3+ phosphor can be improved obviously because of Bi 2 O 3 as fluxing agent role and energy transfer from Bi 3+ to Sm 3+ ions. The possible luminous mechanism of Ca 2 MgWO 6 :Sm 3+ , Bi 3+ phosphor is analyzed and explained by simplified energy level diagrams of WO 6 6− group, Bi 3+ and Sm 3+ ions.
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 LUMINESCENCE
·
2024
·
IF 3.3
Renping Cao,Minhong Wu,Bang Lan,Tengyu Huang,Jingheng Nie,Fangrui Cheng,Xiaohu Luo,Jing Wang
New single phase and adjustable emission phosphors have attracted a lot of attention because of the good luminous properties. In this work, Sm 3+ doped CaTbAl 3 O 7 phosphors are prepared in air by solid-state method. The crystal structure, concentration dependent spectra, lifetimes, and luminescence properties are investigated. Because of the 4 f 8 → 4 f 7 5 d 1 and 4 f → 4 f transitions of Tb 3+ ion, host (CaTbAl 3 O 7 ) shows an excitation spectrum in the range of 220–520 nm under monitored at 544 nm and emits yellow-green light under excitation 248, 284, and 368 nm due to the 5 D 4 → 7 F J ( J = 0, 1, 2, 3, 4, 5, and 6) transitions of Tb 3+ ion. CaTbAl 3 O 7 :Sm 3+ under monitored 598 nm contains the excitation spectral peaks of both CaTbAl 3 O 7 and Sm 3+ ion. With excitation at 368 nm, CaTbAl 3 O 7 :Sm 3+ glows orange-red light, its PL spectrum has both host (CaTbAl 3 O 7 ) and Sm 3+ ion contributing, and the chromaticity coordinates are about (0.5499, 0.4351). Under excitation 402 nm, the red-orange emission of CaTbAl 3 O 7 :Sm 3+ is only the contribution of Sm 3+ ion and the chromaticity coordinates are about (0.5823, 0.4168). The energy transfer process from Tb 3+ in host (CaTbAl 3 O 7 ) to Sm 3+ ions can be confirmed via the spectral properties. We explain the luminous mechanism of CaTbAl 3 O 7 :Sm 3+ by the energy level diagrams of Tb 3+ and Sm 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 SCIENCE-MATERIALS IN ELECTRONICS
·
2016
·Vol. 28
·期 1
·582-587
·
IF 1.798
Cao Renping,Wang Wudi,Zhang Jinlong,Hu Qianglin,Jiang Shenhua,Xiao Fen,Ye Yuanxiu
CaZr(PO 4 ) 2 :Mn 2+ and CaZr(PO 4 ) 2 :Mn 2+ , Sm 3+ phosphors are synthesized by high-temperature solid state reaction method in air. CaZr(PO 4 ) 2 :Mn 2+ phosphor shows green emission and its broad emission band peaking at ~545 nm within the range 470–650 nm is attributed to the 4 T 1 (G) → 6 A 1 ( 6 S) transition of Mn 2+ ion. The optimal Mn 2+ doping concentration is ~5 mol% in CaZr(PO 4 ) 2 :Mn 2+ phosphor. CaZr(PO 4 ) 2 :Mn 2+ , Sm 3+ phosphor with excitation 399 nm emits reddish-orange light, and it shows a systematically varied hue from green to yellow with excitation 405 nm by changing Sm 3+ and Mn 2+ ions concentration. The luminous mechanism of CaZr(PO 4 ) 2 :Mn 2+ , Sm 3+ phosphor is analyzed and explained by the simplified energy level diagrams of Mn 2+ and Sm 3+ ions in CaZr(PO 4 ) 2 :Mn 2+ , Sm 3+ phosphor. The experimental results are helpful to develop new Mn 2+ /Sm 3+ -doped materials.
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 MOLECULAR STRUCTURE
·
2022
·
IF 3.841
Renping Cao,Jiuqin Wei,Ting Chen,Bang Lan,Lan Li,Ru Liu,Zhiyang Luo,Jing Wang
Ba2MgSi2O7:M (M = Bi 3+ , Sm 3+ , Sm 3+ /Bi 3+ ) phosphors are synthesized in air by the high-temperature solid-state reaction method. All samples are confirmed to be a pure phase. With a 316 nm excitation wavelength, Ba 2 MgSi 2 O 7 :Bi 3+ shows blue-white emission including a broad emission band in the range of 340 - 750 nm, and Ba 2 MgSi 2 O 7 :Sm 3+ , Bi 3+ emits a adjustable-color light with the change of the ratio of Sm 3+ to Bi 3+ ions. Under excited at 402 nm, Ba 2 MgSi 2 O 7 :Sm 3+ and Ba 2 MgSi 2 O 7 :Sm 3+ , Bi 3+ emit orange-red light with emission spectrum region from 545 nm to 750 nm, which contain four emission bands peaking at ∼560, 598, 646 and 704 nm due to the 4 G 5/2 → 6 H 5/2 , 6 H 7/2 , 6 H 9/2 , and 6 H 11/2 transitions of Sm 3+ ion, respectively. Ba 2 MgSi 2 O 7 :Sm 3+ , Bi 3+ under excitation at 316 nm can show a white-color emission by changing the ratio between Sm 3+ and Bi 3+ ions. Lifetimes of samples decrease with increasing doped ion (Sm 3+ or Bi 3+ ) concentration. We explain the luminous mechanism of samples by the schematic energy level diagrams of Bi 3+ and Sm 3+ ions in Ba 2 MgSi 2 O 7 :Sm 3+ , Bi 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 PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2024
·
IF 4.1
Shen-Ao Hu,Yu-Guo Yang,Qian Du,Xiao-Na Shen,Xu-Ping Wang,Qing-Gang Li,Cheng-Cheng Qiu,Hua-Jian Yu,Lei Wei,Xian-Shun Lv,Yuan-Yuan Zhang,Ji-Yang Wang,Rui Zhang,Bing Liu
We prepared BaLaGa 3 O 7 : Bi 3+ ,Sm 3+ phosphors via solid state reactions and investigated their crystallinity, lattice occupancy, and photoluminescence performance. The phase and crystal structure, morphology and size, as well as element composition of phosphor were investigated via a series of measurements. The photoluminescence and Bi 3+ → Sm 3+ energy transfers were investigated in detail. It is proved that Bi 3+ → Sm 3+ energy transfer occurs in Bi 3+ /Sm 3+ codoped BaLaGa 3 O 7 phosphors and it is induced by dipole–dipole interaction. By calculating the decay lifetime, the efficiency of Bi 3+ → Sm 3+ energy transfer is evaluated. The CIE coordinates of the prepared show obvious dependence on Sm 3+ concentration and temperature.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
OPTIK
·
2019
·
IF 1.914
Yulin Shi,Yudong Xu,Wenjie Hu,Lei Wang,Ruliang Liu,Heni Wang,Caiyue Zhao,Xinyi Chen,Min Shi
In this article, the authors prepared CaMgAl 10 O 17 : Sm 3+ , CaMgAl 10 O 17 : Eu 3+ and CaMgAl 10 O 17 : Sm 3+ , Eu 3+ phosphors via high temperature solid-state reaction and studied the phase constituents and photoluminescence (PL) of the phosphors as-synthesized. The main emission peaks of CaMgAl 10 O 17 : Sm 3+ at 559 nm, 590 nm and 639 nm are due to 4 G 5/3 → 6 H 5/2 , 4 G 5/3 → 6 H 7/2 and 4 G 5/3 → 6 H 9/2 transitions of Sm 3+ activator, respectively. The optimum doping concentration of Sm 3+ in CaMgAl 10 O 17 is 3 mol. %. The main emissions of CaMgAl 10 O 17 : Eu 3+ peaked at 586 nm and 610 nm belong to 5 D 0 → 7 F J (J = 1, 2) transitions of Eu 3+ activator. When Eu 3+ ions are added into CaMgAl 10 O 17 : 0.03 Sm 3+ phosphors, an energy transfer between Sm 3+ and Eu 3+ via an electrical multipole interaction occurs, and the emission intensity of CaMgAl 10 O 17 : 0.03 Sm 3+ , Eu 3+ phosphors is greatly improved.
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 SCIENCE-MATERIALS IN ELECTRONICS
·
2015
·Vol. 26
·期 9
·6776-6780
·
IF 1.569
Cao Renping,Xu Haidong,Peng Dedong,Gou Qingdong,Zhou Shenlin,Liu Pan,Yu Xiaoguang
BaWO 4 :Sm 3+ , Mo 6+ /K + phosphors are synthesized by a high temperature solid-state reaction method in air. The very strong emission bands peaking at ~600 and 644 nm and the strongest excitation band peaking at ~403 nm are assigned to the 4 G 5/2 → 6 H J (J = 7/2 and 9/2) and 6 H 5 / 2 → 4 F 7 / 2 transitions of Sm 3+ ion, respectively. The optimal Sm 3+ doping concentration is ~5 mol%. Emission intensity of BaWO 4 :Sm 3+ phosphor is increased more than twice owing to charge compensation when the K + ion is codoped as charge compensator, however, Mo 6+ ions is small influence to its emission intensity. The energy transfers and luminous mechanism are explained by using energy level diagrams of WO 4
2− group and Sm 3+ ion. Lifetimes of Ba 0.925 WO 4 :0.05Sm 3+ , Ba 0.925 W 0.9 Mo 0.1 O 4 :0.05Sm 3+ , and Ba 0.9 K 0.05 WO 4 :0.05Sm 3+ phosphors with excitation 403 nm are about 0.933, 0.882, and 0.693 ms, respectively. The experiment results indicate that BaWO 4 :Sm 3+ , Mo 6+ /K + phosphors will be a potential red phosphor candidate for white LEDs based on near UV (~403 nm) LED chip and research contents are useful to improve luminescence properties of Sm 3+ -doped phosphors.
研究领域:
材料科学
·
光学
✓ 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）