CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Noor Zamin Khan,Sayed Ali Khan,Weilong Chen,Abdul Jalil,Jahangeer Ahmed,Muhammad Amin Padhiar,Chen Li,Marcin Runowski,Ren-Kui Zheng
The high-temperature solid state reaction approach was used to successfully synthesize novel tunable-color emitting Ca 2 LuTaO 6 phosphors with double perovskite structure that were un-doped, single-doped, and co-doped with Bi 3+ /Sm 3+ ions. The crystal structure, microstructure, steady-state photoluminescence, time-resolved luminescence measurements, and thermal quenching features of the material were studied. The density functional theory method was used to compute the band gap of the Ca 2 LuTaO 6 , and Ca 2 LuTaO 6 : Bi 3+ , Sm 3+ phosphors. The blue emission at 407 nm (with 313 nm excitation) is due to the host's luminescence, while the cyan emission at 480 nm (under 365 nm excitation) is related to the distinctive 3 P n − 1 S 0 transitions (n = 0, 1, 2) of Bi 3+ . Similarly, efficient red emission is observed in the case of Sm 3+ single-doped Ca 2 LuTaO 6 phosphors. In addition, the Ca 2 LuTaO 6 : 0.04Bi 3+ , 0.05 S m 3+ phosphors exhibit energy transfer phenomena and have excellent thermal stability, the fluorescence intensity at 150 °C maintains 73% of that at 25 °C and has a small chromaticity shift. The intense blue emission at 407 nm was effectively converted to cyan, red, and white light through doping with Bi 3+ and Sm 3+ , and the resulting energy transfer. The results obtained confirm that Ca 2 LuTaO 6 : Bi 3+ , Sm 3+ phosphors as a single matrix have great potential for high-power WLED applications.
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
·
2023
·
IF 3.8
Gaoliang Wang,Jian Li,Liuyang Xu,Honglei Yuan,Xianke Sun
Bi 3+ activated phosphors show potential applications in white light emitting diodes. Here, Bi 3+ activated SrBaGdGaO 5 phosphors with different Bi 3+ concentrations were prepared. The phase and oxidation states, absorbance/excitation/emission spectra, decay characteristics, and thermostability were researched. Depending on excitation of NUV light, the Bi 3+ activated SrBaGdGaO 5 phosphors emit cyan light originating from the radiative 3 P 1 → 1 S 0 transitions of Bi 3+ . On the basis of temperature-dependence emission spectra, the activation energy was calculated as 0.305 eV. The warm white light with a correlated color temperature of 4106 K and a color rendering index of 89.2 was emitted by the WLED device consisting of near ultraviolet LED chips, SrBaGdGaO 5 :Bi 3+ and CaAlSiN 3 :Eu 2+ phosphors. The luminescence performance of the cyan SrBaGdGaO 5 :Bi 3+ phosphors indicates that they can remedy the cyan absence for full spectrum white lighting emitting diodes.
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 ELECTRONIC MATERIALS
·
2016
·Vol. 45
·期 6
·2974-2980
·
IF 1.491
Zheng Yuhui,Hu Jing,Deng Surong,Gao Jinwei,Wang Qianming
High-purity LuVO 4 : Ln 3+ /Bi 3+ (Ln = Eu, Sm, Dy) phosphors with tetragonal zircon structures were successfully synthesized. The reactions have been carried out by multiple irradiations with very high efficiency. Transmission electron microscope images showed that the phosphors had rod-like structures with average lengths of about 200 nm. The host absorption edge of LuVO 4 : Ln 3+ /Bi 3+ (Ln = Eu, Sm) shifted to the longer wavelength side. Furthermore, the red emission of Eu 3+ ion and the orange emission of Sm 3+ ion are remarkably enhanced by encapsulating Bi 3+ in LuVO 4 system, whereas in the case of LuVO 4 : Dy 3+ /Bi 3+ , the host absorption and the yellow emission from dysprosium have been suppressed in the presence of Bi 3+ . These novel findings will facilitate their use in the display field.
研究领域:
材料科学
·
光学材料
·
发光材料
·
无机化学
·
纳米材料
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY
·
2022
·
IF 5.436
Yun-Ling Yang,Ting Li,Fan Guo,Jia-Yong Yuan,Chong-Hao Zhang,Yu Zhou,Qian-Li Li,Dong-Yun Wan,Jing-Tai Zhao,Zhi-Jun Zhang
Mechanoluminescence materials that emit light under mechanical stimulation have attracted widespread attention in sensing, anticounterfeiting, and imaging applications. In this study, a series of Sr1–xBixZnSO (0.001 ≤ x ≤ 0.1) samples was synthesized by the method of high temperature solid-state reaction. It is worth noting that the distortion degree of the SrO3S3 octahedron was increased with increasing Bi3+ concentration, and the color manipulated Sr1–xBixZnSO which can emit different photoluminescence (blue to dark blue and finally red) and mechanoluminescence (orange to red) colors is obtained. Moreover, the deep traps can stably store and provide electronic supplements in shallow traps released under mechanical stimulation. Therefore, devices made of SrZnSO:Bi3+ phosphor and polydimethylsiloxane (PDMS) can be used as thermo-mechano-opto three-mode anticounterfeiting. The ML intensity is linear to the external load and can be utilized for stress sensing or imaging.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Yi Zhang,Peng Wang,Bibo Lou,Shengjie Niu,Haonian Bai,Dan Zhang,Chong-Geng Ma
To fulfill the escalating demand for high-quality white lighting, the exploration of novel and advanced luminescent materials holds a significant role in addressing the issues of reabsorption, color bleaching and deviation in modern WLED solid-state lighting technology based on phosphor-converted materials. In this research, a series of novel Bi 3+ -activated gallium-germanate luminescent materials Sr 2 Ga 2 GeO 7 (SGGO): Bi 3+ were synthesized by means of the classic high-temperature solid-phase method. A comprehensive exploration of their crystal structure, electronic structure, and optical transition properties were conducted through a combined experimental and theoretical calculation analysis. The research outcomes suggest that Bi 3+ , which is prone to occupying Sr sites, shows a remarkable blue emission with a peak at approximately 450 nm throughout the entire spectral range from near ultraviolet (UV) to near infrared when excited at 315 nm, and this is attributed to the 3 P 1 → 1 S 0 transition. Additionally, by devising an efficient energy transfer strategy from Bi 3+ to Eu 3+ , single-component white light can be attained by merely adjusting the doping concentration of Eu 3+ in the SGGO: Bi 3+ , Eu 3+ co-activation system. Eventually, devices packaged based on 310 nm ultraviolet chips also demonstrate the potential application of the synthesized material in WLEDs. These findings contribute to a deeper understanding of the luminescence and energy transfer mechanisms of Bi 3+ -activated systems, and also offer essential guidance for the advancement of high-performance Bi 3+ -doped advanced light-conversion materials and effective materials for various applications demanding enhanced light conversion properties.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Bin Li,Chong Yang,Rongbo Ma,Bin Cao,Chaoyong Deng,Weichao Huang
Bi 3+ -doping luminescent materials have recently evoked considerable interest in versatile applications. In this work, we have developed a series of Bi 3+ -activated CaSrMSbO 6 (M = La, Gd, Y) phosphors with double perovskite structures, exhibiting blue emission from 350 nm to 500 nm. The emission spectral position and intensity of Bi 3+ ions can be tuned by changing excitation wavelength and doping concentrations. The relationship between the local crystal field environment and the luminescence properties is comprehensively analyzed. Importantly, optical temperature properties of CaSrLaSbO 6 : Bi 3+ were investigated and were found to reach a maximum relative sensitivity of 4.57 % K −1 at 298 K. Furthermore, the anti-counterfeiting ink was prepared using CaSrLaSbO 6 : Bi 3+ phosphors, and it showed tunable emission under different light stimulation. These results indicate that CaSrLaSbO 6 : Bi 3+ phosphors have application potential in optical temperature sensing and anti-counterfeiting.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
ECS Journal of Solid State Science and Technology
·
2021
·Vol. 10
·期 5
·055011
·
IF 2.07
Jian Zhang,Ming Wang,Zhiyong Fang,Xiaohui Lai,Zhiqiang Zhong,Rui Zhang
Bi3+-activated luminescence materials have gained growing attentions for optoelectronic applications. In this work, a novel BaLu2MgGa2Si2O12: Bi3+ garnet phosphor was synthesized through a traditional high-temperature solid phase reaction method. The crystal structure was ascertained through X-ray diffraction analysis and Rietveld structural refinement. The particle morphology and constituent elements distributions were investigated through scanning electron microscope and element mapping. Excited at 330 or 370 nm, the phosphors exhibit two emission peaks located at 413 and 495 nm, which is ascribed to the allowed transitions of Bi3+: 3P1 → 1S0. The luminescence intensity reaches the maximum at the 4 mol% Bi3+ doping content, and the emission color is easily manipulated by tuning the excitation wavelength. Besides, the luminescence intensity at 150 ℃ remains 80% of that at room temperature. These results suggest that the novel phosphors have promising application in the near-UV excited white LEDs.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY
·
2023
·
IF 4.6
Sheng Wu,Puxian Xiong,Dongliang Jiang,Quan Liu,Ke Zhang,Binli Xiao,Yan Chen,Yinzhen Wang
An activator’s selective occupation of a host is of great significance for designing high-quality white light-emitting diode phosphors, while achieving a full-spectrum single-phase white light emission phosphor is challenging. In this study, a boron phosphate solid-solution Na2Y2(BO3)2–x(PO4)xO:0.005 Bi3+ (NYB2–xPxO:0.005 Bi3+) white phosphor was designed by selectively occupying Bi3+ activators in the mixed anionic groups. The substitutes of the anionic unit (BO3)3– by the (PO4)3– unit are supposed to force part of the Bi3+ ion to enter the Na lattice site, which produces an intense orange-red emission peaked at 590 nm. In parallel, spectral tuning from blue to white light and an internal quantum efficiency of 56.42% was obtained, and the thermal stabile luminescence intensity remains at 94.2% of the initial intensity after four heating–cooling cycles from 30 to 210 °C (luminescent intensity is 83.6% of room temperature (RT) at 150 °C, with excellent thermal stability and recovery performance). Finally, an excellent color rendering index (Ra = 90.8 and R9 = 85) was demonstrated for white light-emitting diode devices using only an NYB1.5P0.5O:0.005 Bi3+ phosphor and a near-ultraviolet (n-UV) 365 nm LED chip. This work delves into the different selective occupancy of Bi3+ ions and explores a new avenue for the design of phosphors for full-spectrum white light emission.
研究领域:
材料科学
·
光电技术
·
光子学
·
固态照明
✓ 已验证
DOI
高影响因子
PHYSICA SCRIPTA
·
2025
·Vol. 100
·期 3
·035514
·
IF 2.6
Ruiliang Zuo,Zehua Zhang,Jingheng Liang,Zhenzhen Jiang,Lili Wang,Zian Cheak Tiu
In this study, we synthesized Y2Zr2O7 (YZO): Bi3+/Eu3+ microcrystals through high-temperature solid-phase method. When the microcrystals were excited upon 263 nm and 329 nm, a tunable emission color variation from red to white is observed. The Correlated Color Temperature (CCT) of YZO: 6% mol Bi3+, 5% mol Eu3+ excited upon 329 nm is 4194 K, exhibited warm white light. Furthermore, the emission intensity of Eu3+ ion is remarkably improved by the incorporation of Bi3+ ion, due to the energy transfer from Bi3+ ion to Eu3+ ion. Their efficiency (ηT) in YZO: 6% mol Bi3+, 5% mol Eu3+ reaches 49.17%. The corresponding absolute quantum efficiency (λex = 329 nm) of YZO: 6% mol Bi3+, 5% mol Eu3+ is 56.21%. These results indicate that YZO: Bi3+/Eu3+ microcrystals are highly potential to enhance the industrial growth of photonics field, particularly the application of anti-counterfeiting and white light-emitting diodes.
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
·
2018
·Vol. 29
·期 7
·5287-5292
·
IF 2.324
Cao Renping,Quan Guanjun,Shi Zhihui,Gou Qingdong,Chen Ting,Hu Zuofu,Luo Zhiyang
Novel LiBaPO 4 :Bi 3+ yellow-emitting phosphor is synthesized by high temperature solid-state reaction method in air. With excitation 260 nm, LiBaPO 4 :Bi 3+ phosphor emits yellow light with the chromaticity coordinate (0.4272, 0.4657) and color rendering index 77.7. Emission band peaking at ~ 588 nm of LiBaPO 4 :Bi 3+ phosphor in the range of 400–790 nm is attributed to the 3 P 1 → 1 S 0 electron transition of Bi 3+ ion. Excitation band monitored at 588 nm in the range of 220–300 nm is assigned to the 1 S 0 → 3 P 1 electron transition of Bi 3+ ion. The optimal Bi 3+ ion concentration in LiBaPO 4 :Bi 3+ phosphor is ~ 1.0 mol%. Time resolved spectra and fluorescence lifetime data confirm that there is only Bi 3+ ion luminous center in LiBaPO 4 :Bi 3+ phosphor. The luminous mechanism is analyzed by configurational coordinate diagram of Bi 3+ ion. The experiment results are helpful to develop other new Bi 3+ -doped optical materials for solid-state lighting.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Yanan Li,Shujie Gai,Hui Zhu,Jian Yin,Wenyuan Guo,Maxim S. Molokeev,Xiangyang Lu,Mao Xia,Zhi Zhou
Herein, the strategy of replacing Ge 4+ with smaller Si 4+ was adopted to realize the site-selective occupation of Bi 3+ activator in the small ring and obtain a near-infrared light-emitting in Zn 2 (Ge,Si)O 4 . The designed phosphor exhibits a broad NIR emission with FWHM ≈104 nm in the 650−860 nm region, with a center emission wavelength of about 750 nm. Interestingly, the more sensitive four-member ring sites gradually replaced the six-member ring sites and realized a large-scope photoluminescence regulation from blue to NIR by just after the crystal field engineering. The possible reasons for this phenomenon can be interpreted by centroid shift ( ε c ) and crystal field splitting ( ε cfs ). This work not only provides new insights for the development of Bi 3+ -activated NIR-emitting phosphors, but also provides thoughts for revealing the potential NIR luminous mechanism of Bi 3+ .
研究领域:
材料科学
·
光电技术
·
光子学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2023
·Vol. 13
·期 45
·31785-31794
·
IF 3.9
Yi Yu,Kai Shao,Chonghui Niu,Mingjie Dan,Yingying Wang,Xiourong Zhu,Xianke Zhang,Yeqing Wang
In recent years, more and more attention has been paid to optical temperature sensing, and how to improve its accuracy is the most important issue. Herein, a new temperature sensing material, SrGd2Al2O7:Bi3+,Mn4+, based on fluorescence intensity ratio was designed in this work. It has both blue-purple and red luminescence under 300 nm excitation, and the dual-emitting centers with distinct colors, the different thermal sensitivities of Bi3+ and Mn4+, and the energy transfer between Bi3+ and Mn4+ give it excellent signal resolution and accurate temperature detection. The Sa of SrGd2Al2O7:0.04Bi3+,0.003Mn4+ phosphor reaches a maximum value of 8.573% K−1 at 473 K, and the corresponding Sr is 1.927% K−1, both of which are significantly better than those of most other reported optical temperature sensing materials. Taking all the results into account, the SrGd2Al2O7:0.04Bi3+,0.003Mn4+ phosphor can be regarded as a prominent FIR-type temperature sensing material.
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
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