Nanoscale
·
2025
·Vol. 17
·期 26
·15856-15865
·
IF 5.1
Pengfei Du,Peng Zhang,Zhenyang Shen,Yongmei Zhou,Ying Liu,Qingtao Wang
All-solid-state lithium batteries (ASSLBs) are garnering increasing attention as a state-of-the-art energy storage technology. Halide solid electrolytes have emerged as a focal point of research in recent years, owing to their straightforward preparation methods and high ionic conductivity at room temperature. In this study, Bi-doped Li2ZrCl6 was synthesized using a high-energy ball milling method. The Bi3+ ion effectively replaces some of the Zr4+ ions. Due to its lower valence state and larger ionic radius, the concentration of Li+ in the electrolyte increases, and the lattice volume increases, which facilitates Li+ migration. Consequently, the ionic conductivity of modified Li2.15Zr0.85Bi0.15Cl6 at room temperature is 4.9 × 10−4 S cm−1, more than double that of Li2ZrCl6. This enhancement was further validated through cyclic voltammetry and wet air stability tests, which confirmed that Bi3+ doping not only significantly improves the electrochemical high-pressure oxidation stability of Li2ZrCl6 but also enhances its stability in humid air. Additionally, charge/discharge tests on ASSLB using Li2.15Zr0.85Bi0.15Cl6 as the electrolyte demonstrated that Bi doping enhances the electrochemical performance of Li2ZrCl6, leading to improvements in discharge specific capacity and cycle life.
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PubMed
高影响因子
OPTICAL MATERIALS
·
2018
·
IF 2.32
Renping Cao,Wudi Wang,Jinlong Zhang,Yujiao Ye,Ting Chen,Siling Guo,Fen Xiao,Zhiyang Luo
Sr 2 Mg 3 P 4 O 15 :R (R = Bi 3+ , Mn 2+ , and Bi 3+ /Mn 2+ ) phosphors are synthesized by a solid-state reaction method in air. Sr 2 Mg 3 P 4 O 15 :Bi 3+ phosphor with excitation 380 nm shows blue light and its emission band peaking at ∼445 nm is observed. Under excitation at 355 and 416 nm, Sr 2 Mg 3 P 4 O 15 :Mn 2+ phosphor shows red emission with a single broad emission band peaking at ∼630 nm in the range of 500–800 nm owing to the 4 T 1 (G) → 6 A 1 transition of the Mn 2+ ion. The optimal Mn 2+ ion content in Sr 2 Mg 3 P 4 O 15 :Mn 2+ phosphor is ∼0.05 and the lifetime of Sr 2 Mg 2.95 P 4 O 15 :0.05Mn 2+ phosphor is ∼6.17 ms. After Bi 3+ ion is co-doped, emission intensity of Sr 2 Mg 3 P 4 O 15 :Mn 2+ phosphor can be enhanced obviously due to energy transfer (ET) from Bi 3+ to Mn 2+ , which is confirmed by the luminescence properties and lifetimes of Sr 2 Mg 3-x P 4 O 15 :Bi 3+ , Mn 2+ phosphor. Luminous mechanism and ET process of Sr 2 Mg 3-x P 4 O 15 :Bi 3+ , Mn 2+ phosphor are explained by the simple energy level diagram of Bi 3+ and Mn 2+ ions.
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高影响因子
Journal of Materials Chemistry C
·
2020
·Vol. 9
·期 5
·1786-1793
·
IF 7.059
Huimin Li,Haiyan Wu,Ran Pang,Guanyu Liu,Su Zhang,Lihong Jiang,Da Li,Chengyu Li,Jing Feng,Hongjie Zhang
Most of the long persistent luminescence (LPL) materials are investigated at room temperature or higher temperatures. However, LPL materials have promising applications in extremely low-temperature conditions. Here, we report a phosphor, namely BaGa2O4:Bi3+, with LPL that can act as a biological-temperature indicator and thermometer at extremely low temperatures. The traps were investigated in detail with the lowest and highest trap densities of 2.39 × 106 and 7.23 × 107, respectively. The trap distribution ranges from 150 to 750 K in the thermoluminescence (TL) spectrum with corresponding trap depths ranging from 0.310 to 0.716 eV. The TL spectra show that the distribution of the carriers stored in the traps to two emission centers changes with the temperature rising. The low-temperature steady-state photoluminescence (PL) was also investigated. Since the CIE colour coordinates are almost unchanged and the integrated emission intensity at 300 K was still maintained at 88.2% of 7 K, the phosphor presents a stable colour and intensity output. By decomposing the PL spectra at different temperatures, we noticed that one of the deconvoluted full width at half-maximum (FWHM) bands is temperature-sensitive; the thermometer-related parameters were calculated with the maximum values of Sa and Sr to be 0.163 and 0.108%, respectively. Our concept of investigation may promote the follow-up exploration of LPL phosphors under extreme conditions.
研究领域:
材料科学
·
发光光谱学
·
固体物理
·
荧光材料
·
低温物理
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高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Hui Zhang,Yazhou Wang,Yan Jiao,Si Chen,Meisong Liao,Yongzheng Fang,Weiqing Gao,Lili Hu
Fluorescent powders exhibiting excitation dependence and luminescent discoloration are profoundly relevant for concealing information and enhancing optical antiforgery protection. In this study, Bi 3+ /Ln 3+ (Eu 3+ , Er 3+ )-doped phosphors exhibiting multicolor luminescence and excitation wavelength dependence were synthesized. The Bi 3+ /Eu 3+ -codoped phosphors emitted blue, pink, lavender, and red lights under excitation from conventional ultraviolet (UV) sources. In addition to emitting blue light, the Bi 3+ /Er 3+ -codoped phosphors also transmitted upconversion-emission light from green to yellow under 980-nm laser excitation. Additionally, the luminous color of the Ca 3 Y 2 Ge 3 O 12 :0.01Bi 3+ , 0.2Er 3+ phosphor changed from yellow to orange as the temperature increased. Combining the above luminous-color-change phenomena, the word-hiding experiment exhibited excellent realistic information hiding, with complex color transformation in the stamen and petal parts of the flower pattern. Furthermore, rapid multimodal and complex discoloration was achieved using easy-to-obtain light sources, confirming the potential of Bi 3+ /Ln 3+ phosphors for anticounterfeiting applications.
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高影响因子
JOURNAL OF LUMINESCENCE
·
2023
·
IF 3.6
Yuxuan Luo,Danyu Zhang,Shujun Xu,Lianjie Li,Liping Chen,Hai Guo
Herein, YNbO 4 (YNO):Bi 3+ ,Ln 3+ (Ln = Dy, Eu) phosphors were manufactured though high-temperature solid-phase reaction. Their structural properties, optical characteristics and energy transfer mechanisms (Bi 3+ →Ln 3+ ) were analyzed in detail, and their potential application in optical thermometry was explored. Under 312 nm excitation, YNO:Bi 3+ ,Ln 3+ phosphors show broad emission from Bi 3+ ions ( 3 P 1 → 1 S 0 ) and sharp peaks from 4f-4f transitions of Ln 3+ ions. YNO:Bi 3+ ,Ln 3+ samples exhibit high sensitivity and superior thermochromic properties in temperature sensing. For YNO:Bi 3+ ,Dy 3+ phosphor, the maximum absolute sensitivity ( S a ) and relative sensitivity ( S r ) reach 14.25 %K −1 (573 K) and 1.48 %K −1 (444 K), respectively. For YNO:Bi 3+ ,Eu 3+ phosphor, the maximum S a and S r reach 38.21 %K −1 (573 K) and 1.58 %K −1 (445 K), respectively. And the chromaticity shift of emission from YNO:Bi 3+ ,Eu 3+ phosphor is 0.38 for temperature from 303 to 573 K. Such results suggest that YNO:Bi 3+ ,Ln 3+ phosphors can be candidate for visual and highly sensitive optical thermometry.
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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.
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高影响因子
Journal of Materials Chemistry C
·
2023
·Vol. 11
·期 7
·2653-2663
·
IF 6.4
Ruize Liu,Haiyan Wu,Shangwei Wang,Weihong Yuan,Su Zhang,Ran Pang,Lihong Jiang,Da Li,Chengyu Li,Hongjie Zhang
In this work, a series of novel, broadband, cyan-green emitting Ba3LuGa2O7.5:Bi3+ phosphors are prepared to bridge the cyan gap through a simple high-temperature solid-state reaction method. Their crystal structures, morphologies, luminescent properties, temperature-dependent emission spectra, temperature-dependent lifetime decay curves and quantum efficiencies were investigated in detail. Upon 351 nm excitation, the phosphor presents cyan-green emission with the main peak located at 500 nm, corresponding to the 3P1–1S0 transition of Bi3+ ions. The emission intensity of BLGO:0.02Bi3+ phosphors is greatly enhanced when introducing a suitable flux. The value of external quantum efficiency is advanced from 9.43% to 30.93%. According to the luminescence intensity and thermal quenching properties of the phosphor, the potential applications of BLGO:Bi3+ in the two fields of WLEDs and optical temperature sensing were explored. Since the excitation band of the phosphor can match well with that of the near-ultraviolet chip, combined with commercial phosphors, the BLGO:0.02Bi3+ phosphor is employed to obtain a full-spectrum WLED device with a higher color rendering index (CRI, Ra = 93.5), and a lower correlated color temperature (CCT, 4523 K). In the temperature range of 293 to 498 K, the relative sensitivities Sr and S are calculated to reach the maximum value of 2.05% K−1 and 2.21% K−1, respectively. These results indicated that the prepared BLGO:Bi3+ phosphors have potential application prospects as full-spectrum WLEDs and in temperature sensing.
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高影响因子
INORGANIC CHEMISTRY
·
2022
·
IF 5.436
Peixin Gao,Qian Li,Cheng Zhou,Ke Chen,Zan Luo,Sijin Zhang,Maxim S. Molokeev,Jing Wang,Zhi Zhou,Mao Xia
Recently, Bi3+-activated phosphors have been widely researched for phosphor-converted light-emitting diode (pc-LED) applications. Herein, novel full-spectrum A3BO7:Bi3+ (A = Gd, La; B = Sb, Nb) phosphors with a luminescence-tunable performance were achieved by a chemical substitution strategy. In the La3SbO7 host material, a new luminescent center was introduced, with Gd3+ replacing La3+. The photoluminescence (PL) spectra show a large blue shift from 520 to 445 nm, thus achieving regulation from green to blue lights. Moreover, a series of solid solution-phase phosphors La3Sb1–xNbxO7:Bi3+ were prepared by replacing Sb with Nb, and a PL spectral tunability from green (520 nm) to orange-red (592 nm) was realized. Temperature-dependent PL spectra show that La3–xGdxSbO7:Bi3+ phosphors have excellent thermal stability. Upon 350 nm excitation, the PL intensity of La3–xGdxSbO7:Bi3+ phosphors at 150 °C remained at more than 93% at room temperature. With Gd3+ doping, the thermal stability gradually improved, and LaGd2SbO7:0.03Bi3+ represents splendid antithermal quenching (135.2% at 150 °C). Finally, a full-visible spectrum for pc-LED with a high color-rendering index (Ra = 94.4) was obtained. These results indicated that chemical substitution is an effective strategy to adjust the PL of Bi3+, which is of great significance in white-light illumination and accurate plant lighting.
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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.
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高影响因子
CRYSTAL RESEARCH AND TECHNOLOGY
·
2022
·Vol. 57
·期 4
·2100162
·
IF 1.599
Yanli Ding,Zhaohan Li
The low luminous efficiency of upconversion materials limits their practical applications in various fields. The present study focuses on the efficient upconversion enhancement of β-NaYF 4 :Yb,Er induced by Bi 3+ doping. The XRD and SEM results show that introducing Bi 3+ into the matrix lattice changes the microstructure and particle size of the crystal. The photoluminescence spectra show that at 6% Bi 3+ doping, the red and green emission intensities are enhanced by 12 and 8 times, respectively. The reason could be the lattice distortion caused by Bi 3+ doping, breaking the partial forbidden transition of rare-earth ions. The fluorescence lifetime measurement reveals that the Bi 3+ doping changes the environment around erbium ions, affecting the energy level lifetime of erbium ions, explaining the luminescence dynamics law. The present study provides a facile route to achieve nano/microstructures with intense upconversion luminescence with potential applications in optoelectronic devices.
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高影响因子
Journal of Materials Chemistry C
·
2023
·Vol. 12
·期 6
·2053-2062
·
IF 6.4
Zixuan Huang,Jinju Zheng,Hui Fu,Jialiang Jiang,Zilong Li,Chunhong Gu,Zhentao Du,Yang Yang,Weiyou Yang,Jialong Zhao
Non-toxic lead-free vacancy-ordered double perovskites (DPs) are attracting more and more wide interest, thanks to their environment- and eco-friendly nature with exciting applications in modern optoelectronic devices. However, most intrinsic vacancy-ordered DPs exhibit a simple luminescence mode with poor photoluminescence (PL) quantum yield (QY). Herein, we report the exploration of ns2-type ion (Bi3+ and Sb3+) co-doped vacancy-ordered DP Cs2HfCl6 microcrystals (MCs) by a room-temperature precipitation method. Different to single-dopant analogues, the co-doped DPs deliver dual emission bands, which are sensitive to the excitation wavelength and tunable across the full-color region. It is verified that the emission band peaked at 460 nm should have originated from the triplet self-trapped excitons (STEs) of Bi3+ with a lifetime of hundreds of nanoseconds, while that peaked at 590 nm should be ascribed to the microsecond-timescale STEs of Sb3+, respectively. Accordingly, based on these co-doped DPs, high-performance devices such as multi-color anti-counterfeiting and single-component white light emitting diodes (WLEDs) (CIE = (0.344, 0.337), CRI = 84) have been achieved. Moreover, the as-assembled optical temperature sensor exhibits relative sensitivity (SR) and absolute sensitivity (SA) of 1.2% K−1 and 0.013 K−1, respectively, representing their bright future toward multifunctional optoelectronic applications.
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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%.
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