INORGANIC CHEMISTRY
·
2023
·
IF 4.6
Zishuo Yi,Peng Liu,Yan Xu
Optical storage technology for information encryption is a popular means of safeguarding information. Herein, a Bi3+-activated ZnGa2O4 multimode dynamic photoluminescence (PL) material is developed. Upon being irradiated with an ultraviolet lamp at a fixed excitation wavelength of 254 nm, the ZnGa2O4: x% Bi3+ (x = 0.5–5.0) samples exhibit varying degrees of dynamic PL emission due to a distinct Bi3+ doping effect. The mechanism underlying the dynamic PL of ZnGa2O4: Bi3+ associated with Bi3+-activated trap concentration modulation is investigated using thermoluminescence spectra. Additionally, the ZnGa2O4: 5% Bi3+ sample shows a reversible thermally responsive dynamic PL with a color variation from blue to red upon heating from 283 to 393 K. Predesigned procedures based on single-wavelength-mediated photochromic and thermochromic dynamic PL emissions of ZnGa2O4: Bi3+ are designed for rewritable optical data storage and high-level information encryption. Also, an enhanced encryption scheme with a mask encoding technique applying a ZnGa2O4: Bi3+ hybridized polyvinylidene difluoride film is then proposed to increase the security level. Accordingly, this work provides a feasible way to rationally design dynamic PL material offering more creative designs for safeguarding information via encryption.
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 LUMINESCENCE
·
2019
·
IF 2.961
Qiying Huang,Weihao Ye,Guangqi Hu,Xiaotang Liu
Bi 3+ and Mn 4+ co-activated Mg 3.5 Ge 1.25 O 6 phosphors were synthesized via a solid-state method in air. Codoping Bi 3+ into the matrix leads to effective enhancement of the deep-red emssion (659 nm) compared to Bi 3+ -free samples. The spectroscopic properties are discussed based on the Bi 3+ (6s 2 )→Ge 4+ (3d 10 ) metal-to-metal charge transfer and energy transfer between Bi 3+ and Mn 4+ . All samples emit deep-red emission ascribed to 2 E g → 4 A 2g transition of Mn 4+ . We have carried out the X-ray power diffraction (XRD), photoluminescence spectrum (PL), field emission scanning electron microscope (FESEM), fourier transform infrared spectroscopy (FT-IR) and UV–Vis absorption measurement to investigate the influences induced by Bi 3+ incorporation.
研究领域:
材料科学
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光学农业
✓ 已验证
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2022
·
IF 4.171
Renping Cao,Rixing Liang,Lan Li,Ru Liu,Ting Chen,Bang Lan,Youcun Liu,Jing Wang,Chenxing Liao
Bi 3+ , Eu 3+ singly doped and Bi 3+ /Eu 3+ co-doped Ca 9 MgLi(PO) 7 (CMLPO) with a single pure phase are synthesized in air by high-temperature solid-state method and their crystal structure and the luminescence properties are investigated. CMLPO:Bi 3+ with excitation at 313 nm shows blue emission. CMLPO:Eu 3+ with excitation at 318 and 394 nm emits red emission. CMLPO:Eu 3+ , Bi 3+ with excitation at 318 nm shows an adjustable color emission when the ratio between Eu 3+ and Bi 3+ ions is changed. CMLPO:Eu 3+ , Bi 3+ under excitation 394 nm only emits a single red color light. The optimal Eu 3+ concentration in CMLPO:Eu 3+ and Bi 3+ concentration in CMLPO:8 mol%Eu 3+ , Bi 3+ are ∼8 mol% and 2 mol%, respectively. The luminescence intensity of CMLPO:Eu 3+ can be enhanced 1.4–2.2 times when Bi 3+ ion as sensitizer is co-doped into CMLPO:Eu 3+ . The energy transfer process in CMLPO:Eu 3+ , Bi 3+ is observed and analyzed. The luminous mechanisms of samples are explained by using the energy level diagrams of Eu 3+ and Bi 3+ ions. The research in this paper offers effective guidance for the optical property improvement of phosphors by co-doping other ions as sensitizer.
研究领域:
材料科学
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光学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2022
·Vol. 10
·期 44
·16670-16678
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IF 8.067
Peishan Shao,Puxian Xiong,Yao Xiao,Qianyi Chen,Yongsheng Sun,Na Yan,Dongdan Chen,Zhongmin Yang
Mechanoluminescent (ML) materials, which can emit light under external mechanical stimuli, have attracted much interest in diverse applications such as stress sensing, anti-counterfeiting and 3D signatures. However, ML materials located within the ultraviolet (UV) spectral range are still limited. In this study, a series of LixY0.995GeO4:0.005Bi3+ (0.898 ≤ x ≤ 1.003) samples are synthesized by a high temperature solid-state reaction method. The crystal structure, ML, persistent luminescence (PersL) and photoluminescence (PL) are systematically studied. The excellent UVA PersL of LiYGeO4:Bi3+ can be ascribed to the existence of abundant trap sites created by the intentional loss of Li+ ions, which can improve the ML properties of the phosphors. This excellent material can make up for the deficiency of PersL materials in the UVA region (315–450 nm), and it may greatly expand the application of ML materials in the biomedical, energy and catalysis fields.
研究领域:
材料科学
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光学
·
生物医学工程
✓ 已验证
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2016
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IF 2.653
Renping Cao,Ting Fu,Dedong Peng,Chunyan Cao,Wen Ruan,Xiaoguang Yu
Host SrSb 2 O 6 , SrSb 2 O 6 :Bi 3 + , SrSb 2 O 6 :Eu 3 + , and SrSb 2 O 6 :Eu 3 + , Bi 3 + phosphors are synthesized by solid state reaction method in air. Host SrSb 2 O 6 with excitation 254 nm shows weak green-yellow emission in the range of 320–780 nm due to Sb 5 + → O 2– transition. SrSb 2 O 6 :Bi 3 + phosphor with excitation 365 nm emits green light within the range 400–650 nm owing to the 3 P 1 → 1 S 0 transition of Bi 3 + ion. SrSb 2 O 6 :Eu 3 + phosphor with excitation 254 nm exhibits a systematically varied hue from green to orange-red light by increasing Eu 3 + concentration from 0 to 7 mol%, and that with excitation 394 nm only shows orange-red light. The optimal Eu 3 + concentration is ~ 4 mol% in SrSb 2 O 6 :Eu 3 + phosphor. SrSb 2 O 6 :Eu 3 + , Bi 3 + phosphor with excitation 254 and 394 nm emits orange-red light. Emission intensity of SrSb 2 O 6 :Eu 3 + phosphor may be enhanced > 2 times by co-doping Bi 3 + ion because of the fluxing agent and energy transfer roles of Bi 3 + ion in SrSb 2 O 6 :Eu 3 + , Bi 3 + phosphor. The luminous mechanism of SrSb 2 O 6 :Eu 3 + , Bi 3 + phosphor is analyzed and explained by the simplified energy level diagrams of Sb 2 O 6 2 − group, Bi 3 + and Eu 3 + ions, and energy transfer processes between them.
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
·
2023
·
IF 5.2
Jiamei Song,Xinyu Zhang,Ninglei Huang,Hongjian Dou,Bo Chen,Xiuna Tian,Changjun Wang,Lingyuan Wu
A zincate material, BaLa 2 ZnO 5 was successfully synthesized by a high-temperature solid-state method as a host for Bi 3+ . All the peaks in the X-ray diffraction patterns of the obtained material could be attributed to single phase BaLa 2 ZnO 5 . The BaLa 2 ZnO 5 host exhibited strong band-to-band absorption in the range of 200–290 nm. After the doping of Bi 3+ , the absorption band due to band-to-band transition decreased, and three new absorption bands appeared. Upon monitoring the luminescence of Bi 3+ at 407 nm, three excitation peaks were observed for BaLa 2 ZnO 5 : Bi 3+ , which could be attributed to A, C and metal-to-metal charge-transfer states by analyzing its excitation and absorption spectra . When codoped with Bi 3+ and Sm 3+ , BaLa 2 ZnO 5 : Bi 3+ /Sm 3+ exhibited strong energy transfer process from Bi 3+ to Sm 3+ . Variable-temperature emission spectra revealed that the luminescence intensity of Bi 3+ decreases rapidly with the increase in temperature, while that of Sm 3+ ions decreases slowly. The relative sensitivity ( S R ) values of the BaLa 2 ZnO 5 : Bi 3+ and BaLa 2 ZnO 5 : Bi 3+ /Sm 3+ phosphors to temperature (1.77 and 1.12% K −1 , respectively) were high and extremely stable in the range of 293–423 K. Therefore, the Bi 3+ -doped BaLa 2 ZnO 5 phosphor has great application potential for biological temperature sensing.
研究领域:
材料科学
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光学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Haifeng Zhu,Shuqing Feng,Zihui Kong,Xu Huang,Lu Peng,Jing Wang,Wai-Yeung Wong,Zhi Zhou,Mao Xia
Ultra-broad-band white emitting phosphors have a wide application prospect in the new generation of illumination systems. Due to the sensitivity of Bi 3+ to the surrounding environment, it exhibits different luminescence properties in different crystallographic sites, which makes it easy to achieve white emission. Cationic substitution engineering is the most effective strategy for controlling the environment around Bi-site and realizing the spectrum tuning. Herein, we conducted substitution engineering in K 2 MgGeO 4 :Bi 3+ (KMGO:Bi 3+ ) that uses alkali metal A + (A = Li, Na, Rb) to substitute K + . The difference in emission spectrum excited at various wavelengths is related to extra luminescent centers generation and Bi 3+ occupancy rearrangement in KMGO:Bi 3+ under the influence of Li + and Na + , which also leads to the expansion of full widths at half-maximum (FWHM) to 204 nm forming a bright white emission. Besides, the modulation of Rb + increases the activation energy and enhances its thermal stability to 88.66%. The high R a values (93.4) of the fabricated WLED indicate that K 1.456 Na 0.54 MgGeO 4 :0.004Bi 3+ could be used as a single-component white phosphor in solid-state lighting. Our research shows that alkali metal substitution engineering is of great significance to controlling the luminescence emission and improving the thermal stability of luminescent materials.
研究领域:
材料科学
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光学
✓ 已验证
产品关联
DOI
高影响因子
PHYSICA B-CONDENSED MATTER
·
2022
·
IF 2.988
Xianzhi Zeng,Haoyi Wu,Junhao Peng,Chuanlong Wang,Guangting Xiong,Yahong Jin,Yihua Hu
The improvement of luminescent properties is important for expanding the application of long afterglow phosphor (LAP). Here, the melilite-type Sr 1·97 MgSi 2 O 7 : Eu 2+ 0.01 , Dy 3+ 0.02 LAP was studied with Bi 3+ as the second co-dopant. Both photoluminescence (PL) and thermoluminescence (TL) were improved in terms of intensity and afterglow lifetime when the doping concentration of Bi 3+ exceeded 2.5 mol%, and the optimized point was 3.5 mol%. As compared to the case of Eu 2+ - Dy 3+ double doping, the improved PL of Eu 2+ - Dy 3+ - Bi 3+ triple doping samples was attributed to better photon absorption . The improved TL and afterglow were attributed to the synergistic strengthening density of the traps by Bi 3+ and the deepening of trapping by Dy 3+ , if their distance was sufficient close. As a result, both TL and afterglow optimized at a concentration of 2 mol% Dy 3+ - 3.5 mol% Bi 3+ coupling.
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
Renping Cao,Tengyu Huang,Jingheng Nie,Lei Zhang,Yuyu Chen,Lan Li,Bang Lan,Jing Wang
New tunable-color luminescent materials are getting a lot of attention. Double-doped activated ions are an important research method. Here, CaSrNb 2 O 7 :R 3+ (R 3+ = Sm 3+ , Bi 3+ , and Sm 3+ /Bi 3+ ) are synthesized by solid state method in the air. Phase purity and successful synthesis of samples are confirmed by X-ray diffractometer (XRD) patterns and energy disperse spectroscopy (EDS) diagram. The luminescence properties of samples are studied. CaSrNb 2 O 7 :Sm 3+ has an excitation spectrum due to the O 2- - Sm 3+ charge transfer band (CTB) and the 6 H 5/2 → 4 H 9/2 , 4 D 3/2 , 4 D 1/2 , 4 F 7/2 , and 4 I 11/2 transitions of Sm 3+ ion. The red-orange emission of CaSrNb 2 O 7 :Sm 3+ is observed 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. PLE spectrum of CaSrNb 2 O 7 :Bi 3+ comes from the metal-to-metal charge- transfer (MMCT) Bi 3+ - Nb 5+ and the 1 S 0 → 1 P 1 and 3 P 1 transitions of Bi 3+ ion. CaSrNb 2 O 7 :Bi 3+ shows blue emission due to the 3 P 1 → 1 S 0 transition of Bi 3+ ion. The excitation spectrum of CaSrNb 2 O 7 :Sm 3+ , Bi 3+ contains that of CaSrNb 2 O 7 :Bi 3+ and CaSrNb 2 O 7 :Sm 3+ . CaSrNb 2 O 7 :Sm 3+ , Bi 3+ with excitation at 314, 363, and 406 nm glows orange and red-orange, and red emission, respectively. We observe the energy transfer from Bi 3+ to Sm 3+ ions and the effect of Bi 3+ on luminescence properties of Sm 3+ ion by their spectra. The optimal Sm 3+ and Bi 3+ concentrations are confirmed by the concentration dependent spectra. The energy level diagrams of Sm 3+ and Bi 3+ are used to analyze the luminous mechanism. The results are conducive to the development of new Sm 3+ and Bi 3+ co-doped luminescent materials.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Xiaoxuan Fan,Lirong Xu,Wen Liu,Feifei Yin,Jianbo Xu,Shuo Cao,Yadan Ding,Xia Hong,Tianya Tan,Kexin Wang,Jiwei Wang
In this work, a Bi 3+ and Eu 3+ co-doped borate oxide LiY 6 (BO 3 ) 3 O 5 (LYBO) phosphor was prepared using high temperature solid-state method. Eu 3+ can be well sensitized by Bi 3+ in the LYBO matrix under 305 nm excitation and produce well-separated emission bands with high intensity. The energy transfer from Bi 3+ to Eu 3+ results in the tunable multicolor emission from LYBO. The maximum energy transfer efficiency can reach 95.93 %. The Bi 3+ and Eu 3+ emissions exhibit the differentiated responses to thermal quenching. The fluorescence intensity ratios between 615 nm and 421 nm show a favorable linear relationship in the range of 123–483 K. It indicates the outstanding optical thermometry performance of LYBO: Bi 3+ , Eu 3+ . The maximum absolute sensitivity (S a ) and relative sensitivity (S r ) are determined to be 0.0087 K -1 and 3.84 % K −1 , respectively. The results exhibit that LYBO: Bi 3+ , Eu 3+ phosphor has a promising application as an optical thermometer in non-contact 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
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
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光学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2025
·
IF 4.7
Xuyan Xue,Sihan Yang,Weigang Liu,Liang Dong,Qi Zhu,Xuejiao Wang,Ji-Guang Li
Herein, we report a series of NaLaCaWO 6 : Bi 3+ , Eu 3+ double perovskite phosphors with a monoclinic crystal structure, achieving high-precision optical thermometry. Comprehensive characterisations, including X-ray diffraction, Raman spectroscopy, X-ray photoelectron spectroscopy, scanning electron microscopy and thermoluminescence, revealed detailed material properties. The electronic structure and formation energies of NaLaCaWO 6 : Bi 3+ , Eu 3+ were calculated using density functional theory (DFT), and the influence of luminescent centers (Bi 3+ and Eu 3+ ) on the optical properties was analyzed. The emission colour was tuned from green to red with increasing Eu 3+ , and efficient Bi 3+ → Eu 3+ energy transfer was achieved through dipole–dipole interaction, with an energy transfer efficiency of 59.4 %. In addition, the distinct temperature response characteristics of Bi 3+ and Eu 3+ fulfilled the prerequisites for efficient temperature signal resolution, demonstrating a high relative sensor sensitivity of 0.74 % K −1 (at 298 K) and minimal temperature resolution (δ T = 0.14 K) for the NaLaCaWO 6 : 0.05Bi 3+ , 0.01Eu 3+ . The moisture resistance of the phosphor was confirmed through a water immersion test, demonstrating excellent moisture resistance. These findings not only elucidate the photoluminescence behaviour of Bi 3+ and Eu 3+ in NaLaCaWO 6 but also highlights its promising application prospects in optical thermometry.
研究领域:
材料科学
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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）