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
OPTICAL MATERIALS
·
2022
·
IF 3.754
Xiaoli Li,Yonglei Feng,Liwei Wang,Xianke Sun
A few of Bi 3+ /Mn 2+ doped Ba 9 La 2 Si 6 O 24 phosphors were synthesized in air by the solid state reactions at 1400 °C for the purpose of investigating their possible uses in the light-emitting diodes. The phase and luminescence performance were surveyed using the X-ray diffractometer and spectrometer, respectively. The results demonstrate the single phase and absorbance to the ultraviolet light of the synthesized phosphors. There is the Bi 3+ → Mn 2+ energy transfer, which gives rise to the tunable luminescence of the Bi 3+ /Mn 2+ codoped Ba 9 La 2 Si 6 O 24 phosphors. Upon the ultraviolet light excitation, the white light is generated by the Ba 9 La 2 Si 6 O 24 :0.03Bi 3+ /0.02Mn 2+ and Ba 9 La 2 Si 6 O 24 :0.03Bi 3+ /0.03Mn 2+ phosphors.
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
·
2022
·
IF 4.171
Erlei Wang,Kun Feng,Jia Li,Xiaodong Zhou,Xianke Sun
A series of Bi 3+ /Tb 3+ /Eu 3+ doped NaYGeO 4 phosphors were synthesized via the solid state sintering at 1300 °C for 3 h. The phase and luminescence performance of the synthesized phosphors were investigated. The Bi 3+ , Tb 3+ and Eu 3+ single doped NaYGeO 4 phosphors show the prominent blue, green and red emission, respectively. And the emission shows obvious dependence on doping concentration and excitation wavelength. The Bi 3+ → Tb 3+ /Eu 3+ energy transfers were confirmed by the luminescence characteristics of the Bi 3+ /Tb 3+ , Bi 3+ /Eu 3+ and Bi 3+ /Tb 3+ /Eu 3+ doped NaYGeO 4 phosphors. The Bi 3+ → Tb 3+ energy transfer in the NaYGeO 4 :Bi 3+ /Tb 3+ phosphors leads to the tunable emission from the blue to cyan-green light region and the Bi 3+ → Eu 3+ energy transfer in the NaYGeO 4 :Bi 3+ /Eu 3+ phosphors leads to the tunable emission from the blue to purple-red light region. But in the NaYGeO 4 :Bi 3+ /Tb 3+ /Eu 3+ phosphors, the Bi 3+ → Tb 3+ /Eu 3+ energy transfers lead to the tunable emission from the blue to yellow light region through the white light region. From the luminescence characteristics of the Bi 3+ /Tb 3+ /Eu 3+ doped NaYGeO 4 phosphors, the energy transfer mechanisms were speculated.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Lin Zhang,Fei Ma,Qingmei Guan,Chang Wang,Cuibing Bai,Liangquan Sheng
The flaky Bi 3+ sensitized Gd 2 O 2 SO 4 : Eu 3+ compounds were prepared from the sodium dodecyl sulfate intercalated layered rare-earth hydroxide by calcination at 800 °C. The precursor Gd (1.9-X) Eu 0.1 Bi X (OH) 5 NO 3 ·1.5H 2 O was fabricated by methanol-solvothermal reaction at 150 °C for 12h. XRD and TEM analyses demonstrated that the precursor LGdH were formed of crystallites with a uniform crystallographic orientation. After the anion DS − intercalated, the interlayer space of LGdH increased, but the layer structure did not change. Their single-crystal nature and sheet-like morphology were reserved after calcination, The excitation spectrum monitored by 612 nm featured a broad band at 332 nm which could be ascribed to the 6s 2 -6s6p transition of Bi 3+ , and, accordingly the flaky Gd 2 O 2 SO 4 :Eu 3+ ,Bi 3+ exhibited greatly enhanced characteristic red emission of Eu 3+ . The PL properties of the Gd 2 O 2 SO 4 :Eu 3+ ,Bi 3+ samples were measured at different concentrations of Bi 3+ and fixed Eu 3+ concentration 5 at%, and the highest PL quantum yield was 20.58% of Gd 2 O 2 SO 4 :Eu 3+ ,Bi 3+ at a Bi 3+ concentration of 4 at%.
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
·
2022
·
IF 5.6
Renping Cao,Zhiyi Huang,Bang Lan,Lan Li,Xuehua Yi,Zhiyang Luo,Chenxing Liao,Jing Wang
Ca 3 Zn 3 Te 2 O 12 :Bi 3+ , Ca 3 Zn 3 Te 2 O 12 :Eu 3+ , Ca 3 Zn 3 Te 2 O 12 :Eu 3+ /Bi 3+ are prepared successfully in air. The crystal phase, microscopic image, and optical properties of samples are investigated by the X-ray difractometer, scanning electron microscopy, and edinburgh steady-state FLS 980 spectrograph. The green emission of Ca 3 Zn 3 Te 2 O 12 :Bi 3+ phosphor with excitation at 314 nm is observed and its broad emission spectrum in the range of 360 - 790 nm is attributed to the 3 P 1 → 1 S 0 transition of Bi 3+ ion. Under excitation at 395 nm, the red emission of Ca 3 Zn 3 Te 2 O 12 :Eu 3+ is found, the chromaticity coordinates are (0.6392, 0.3605), and its PL spectrum is in the rang of 575 - 750 nm because of the 5 D 0 → 7 F 0 , 7 F 1 , 7 F 2 , 7 F 3 , and 7 F 4 transations of Eu 3+ ion. The doping Bi 3+ ion can affect the luminescence properties of Ca 3 Zn 3 Te 2 O 12 :Eu 3+ phosphor. The adjustable color light from green to yellow of Ca 3 Zn 3 Te 2 O 12 :Eu 3+ , Bi 3+ phosphor with excitation at 314 nm is revealed when Eu 3+ concentration is changed from 0 to 12 mol%. When the excitation wavelength is 395 nm, Ca 3 Zn 3 Te 2 O 12 :Eu 3+ , Bi 3+ phosphor only emits red light with emission spectrum in the rang of 575 - 750 nm. The energy level diagrams of Eu 3+ and Bi 3+ in Ca 3 Zn 3 Te 2 O 12 :Eu 3+ , Bi 3+ are drawn, which is used to analyze the luminous mechanism of samples.
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
·
2020
·Vol. 31
·期 5
·3944-3950
·
IF 2.22
Tian Xiuna,Dou Hongjian,Wu Lingyuan
Based on the luminescence of Bi 3+ , novel temperature sensing materials CaZrO 3 :Bi 3+ and CaZrO 3 :Bi 3+ /Sm 3+ were successfully synthesized by solid-state reaction. The XRD patterns show that the synthesized materials have a pure phase of CaZrO 3 . The XPS results show that the Bi 3+ and Sm 3+ can be detected in CaZrO 3 :Bi 3+ /Sm 3+ . With the excitation of 318 nm, the CaZrO 3 :Bi 3+ material shows intense temperature-dependent luminescence. The maximum relative sensitivity can be obtained at 440 K (1.78% K −1 ). Under the excitation of 408 nm, the CaZrO 3 :Sm 3+ material shows the characteristic emission peaks of Sm 3+ . The spectral overlap between the emission spectrum of Bi 3+ and the excitation spectrum of Sm 3+ leads to an energy transfer from Bi 3+ to Sm 3+ in CaZrO 3 :Bi 3+ /Sm 3+ phosphor. With the excitation of 318 nm, the emission spectrum of CaZrO 3 :Bi 3+ /Sm 3+ material shows the characteristic peaks of Bi 3+ and Sm 3+ . The fluorescence decay curves also show the evidence of the energy transfer from Bi 3+ to Sm 3+ . The luminescence intensity ratio of Sm 3+ and Bi 3+ in CaZrO 3 :Bi 3+ /Sm 3+ shows obvious temperature dependence. Based on the luminescence intensity ratio, a large relative sensitivity is obtained at 443 K (1.15% K −1 ).
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
LUMINESCENCE
·
2017
·Vol. 32
·期 6
·908-912
·
IF 1.509
Renping Cao,Jinlong Zhang,Wudi Wang,Qianglin Hu,Wensheng Li,Wen Ruan,Hui Ao
CaSnO 3 :Bi 3+ blue-emitting phosphor was synthesized using a high-temperature solid-state reaction method in air. The crystal structures and luminescence properties were investigated. A broad emission band peaking at ~448 nm upon excitation at 262 and 308 nm was observed in the range 330–680 nm at room temperature due to 3 P 1 → 1 S 0 transition of the Bi 3+ ion. The chromaticity coordinate was (0.1786, 0.1665). The optimal Bi 3+ ion concentration was ~0.6 mol% in CaSnO 3 :Bi 3+ phosphor. The emission spectrum of CaSnO 3 :Bi 3+ phosphor showed a blue-shift with increasing temperature from 50 to 300 K due to the influence of temperature on the electron transition of the Bi 3+ ion. The emission intensity of CaSnO 3 :Bi 3+ phosphor may be increased ~1.45 times by co-doping Li + ions as a charge compensator and fluxing agent. The luminescence mechanism is explained by a configurational coordinate diagram of Bi 3+ ion in CaSnO 3 :Bi 3+ phosphor.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
PubMed
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
OPTICAL ENGINEERING
·
2023
·
IF 1.3
Jie Zheng,Xian Wu,Wenkai Zhang,Jiahao Cheng,Ke Liu,Guijie Liang,Xin Zhang,Jingyang Wang,Yating Zhang,Qingsong Hu
In recent years, lead-free metal halide luminescent materials have attracted extensive attention because of their excellent properties including but not limited to good environmental compatibility, ultrawide emission band, and high photoluminescence quantum yield. They are considered to have great application potential in the photoelectric field. We modified the previously reported synthesis and prepared pure phase Cs2SnCl6 : Bi3 + , Te4 + using simple solution method. Then the emitter was further coated with polysiloxane to form polysiloxane luminescent ceramic (PSOLC). The prepared PSOLCs have almost the same luminescence as the powders, and their color coordinates and color temperature can be tuned freely by adjusting the ratio of blue and yellow emission, which both encourage outdoor-lighting application. Additionally, they are demonstrated to support flexible luminescence and show highly improved machinability. To test their performance in practical application, we apply the PSOLCs to safety identification board and finally get a satisfactory result, directly indicating that the PSOLCs prepared from lead-free perovskite are quite suitable for flexible-lighting-related display applications.
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 SOLID STATE CHEMISTRY
·
2020
·
IF 2.726
Cui Chen,Yuxuan Xia,Zizheng Yue,Wenlin Feng,Xiaozhan Yang
A series of Tb 3+ (or Bi 3+ ) doped and Tb 3+ , Bi 3+ co-doped CaAl 2 O 4 phosphors were successfully prepared by the conventional solid state reaction method. The properties of the as-prepared samples, including the crystal structure, morphology, composition and photoluminescence properties are characterized by the X-ray diffraction (XRD), high-resolution transmission electron microscope (HRTEM), energy dispersive spectrometer (EDS), high-angle annular dark field (HAADF) image and spectroscopy technology, etc. The diffraction patterns of the doped samples display the peaks corresponding to the CaAl 2 O 4 phase. The EDS and HAADF indicate that the Ca, Al, O, Tb and Bi elements are distributed uniformly in the Tb single-doped and the Tb, Bi co-doped CaAl 2 O 4 samples. In order to investigate the energy transfer from Bi 3+ to Tb 3+ , the critical (or optimal) doped concentrations of Tb and Bi in CaAl 2 O 4 are obtained experimentally in sequential order. The critical doped concentrations (single-doped: 3 mol%Tb 3+ , and co-doped: 3 mol%Tb 3+ , 0.3 mol%Bi 3+ ) for CaAl 2 O 4 hosts have been determined. A strong blue-green luminescence corresponding to 5 D 4 → 7 F 5 transition of Tb 3+ by near ultra-violet (367 nm) excitation and the obvious energy transfer from Bi 3+ to Tb 3+ in the co-doped CaAl 2 O 4 can be observed. The energy transfer mechanism has been discussed. The CIE coordinates and decay lifetimes for the typical samples have also been investigated. It is found that CaAl 2 O 4 : Tb 3+ , Bi 3+ is a blue-green emitting phosphor and has higher efficiency for the operation with near ultra-violet excitation.
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
危险品化学品经营许可证（带存储）