ADVANCED MATERIALS
·
2026
·
IF 29.1
Xiaonan Kang,Xing Zhao,Haoyu Wang,Haibo Zhang,Leiyang Zhang,Kun Yu,Yan Yan,Li Jin,Hua Tan,Gang Liu,Shujun Zhang
Achieving superior energy storage in antiferroelectric ceramics is limited by a fundamental compromise: realxor behavior comes at the cost of sacrificing polarization strength. This directly leads to a mutually restrictive balance between recoverable energy density ( W rec ) and energy storage efficiency ( η ). To overcome this, we develop a Bi-induced local bonding modulation strategy in Pb 0.92-1.5 x Sr 0.08 Bi x Zr 0.49 Sn 0.5 Ti 0.01 O 3 ceramics that simultaneously strengthens the AFE framework and refines polarization response. This approach elevates both the breakdown strength and the AFE-FE transition field, allowing the material to withstand higher electric fields and release greater stored energy. The optimized composition achieves a record-high W rec of 15.6 J cm −3 with ∼90% efficiency under 600 kV cm −1 , alongside ultrafast discharge ( t 0.9 ∼64.5 ns) and excellent thermal/frequency stability. Atomic-scale characterization reveals a coexistence of robust long-range AFE order and local polar heterogeneity, which collectively smooths the field-induced transition path and suppresses early breakdown. This work provides a generalizable design principle for dielectric capacitors by strategically decoupling polarization enhancement from relaxor behavior, paving the way for high-energy, high-efficiency pulsed-power systems.
✓ 已验证
产品关联
DOI
高影响因子
PHYSICA B-CONDENSED MATTER
·
2025
·
IF 2.8
Rongbo Ma,Xinyong Gong,Chaoyong Deng,Weichao Huang
To develop novel luminescent materials for optical thermometry, a series of La 2 MgSnO 6 :Mn 4+ , M (M=Bi 3+ , Sm 3+ ) phosphors were prepared by the solid-state method. Upon UV excitation, the La 2 MgSnO 6 : Mn 4+ sample demonstrates strong red emission originating from the 2 E g → 4 A 2g transition of Mn 4+ . By co-doping with Bi 3+ or Sm 3+ , it becomes possible to achieve tunable emission in La 2 MgSnO 6 phosphors. Due to the different thermal quenching behavior between the Mn 4+ and Bi 3+ or Sm 3+ , a high-sensitivity thermometric was developed using the fluorescence intensity ratio mode. The maximum sensitivity was obtained to 1.5%K -1 at 473K. The emission spectra of La 2 MgSnO 6 : Mn 4+ , M (M=Bi 3+ , Sm 3+ ) phosphor significantly coincide with the absorption spectra of plant pigments in the blue and red regions. These findings indicate that the as-prepared La 2 MgSnO 6 : Mn 4+ , M (M=Bi 3+ , Sm 3+ ) phosphors are promising candidate materials for plant cultivation and high-temperature optical thermometry.
研究领域:
材料科学
·
光学
·
植物学
✓ 已验证
产品关联
DOI
高影响因子
ACS ES&T Engineering
·
2025
·
IF 6.7
Jiang Wu,Jiawei Liu,Ni Qin,Dinghua Bao
Piezocatalysis driven by mechanical vibration has emerged as a promising approach for environmental remediation and biomedical therapy. Nevertheless, achieving a high catalytic efficiency through rational material design remains a critical challenge. Herein, different from the extensively studied oxygen vacancy strategy, we report a novel cation defect-engineering strategy for the dual enhancement of catalytic and neuro-regenerative performance. This study demonstrates, for the first time, that bismuth vacancies (VBi) act as powerful active sites that modulate the electronic structure and charge transfer dynamics, resulting in remarkable catalytic enhancement and neuronal differentiation capability. Compared with VBi deficient Bi4Ti3O12, VBi-rich Bi4Ti3O12 nanoplates exhibit substantially enhanced piezocatalytic activity, with a 1.7-fold increase in •O2¯ concentration, a 4-fold increase in •OH concentration, and a 17-fold increase in the reaction rate constant. Density functional theory (DFT) calculations reveal that VBi introduces an intermediate defect energy level within the bandgap, thereby facilitating charge separation and reactive species generation. Moreover, under ultrasonic–piezoelectric stimulation, the VBi-rich nanoplates significantly promote neuronal differentiation, underscoring their dual functionality in catalytic and biomedical applications. Collectively, this study provides comprehensive insights into the critical role of cation defect engineering in advancing high-performance piezoelectric materials, thereby establishing a novel and effective paradigm for both environmental remediation and neuronal regenerative applications.
研究领域:
材料科学
·
纳米技术
·
催化
·
生物医学工程
·
神经科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL PHYSICS
·
2026
·
IF 2.4
Renping Cao,Chunxi Lin,Jiaxin Lin,Ruirui Yang,Fangrui Cheng,Jingheng Nie,Xiaochun Li,Zhulei Lei
Cr 3+ doped luminescence materials have been investigated widely and their luminescence property improvements are becoming a research hotspot by the researchers. In this work, we study the broadband near-infrared emission improvement and synthesis of Cr 3+ doped perovskite (Li 1.6 Mg 1.6 Sn 2.8 O 8 :Cr 3+ ) via co-doped Bi 3+ ions. The crystal structure, morphology, and luminescence properties of samples are investigated, respectively. Photoluminescence (PL) spectra of Li 1.6 Mg 1.6 Sn 2.8 O 8 :R (R = Cr 3+ , Cr 3+ /Bi 3+ ) in the range of 650 - 1250 nm are observed with a broad PL band and ∼186 nm full width at half maximum due to the 4 T 2 ( 4 F) → 4 A 2 transition of Cr 3+ ion in weak crystal field. The spectral intensity of Li 1.6 Mg 1.6 Sn 2.8 O 8 :Cr 3+ can be enhanced ∼2.4 times because of the change of crystal field when the co-doped Bi 3+ ions is ∼4 mol%. The good luminous thermal stability of Li 1.6 Mg 1.6 Sn 2.8 O 8 :Cr 3+ , Bi 3+ is confirmed by using PL spectra under the temperature from 300 to 450 K. The concentration/thermal quenching and luminescence mechanisms of Li 1.6 Mg 1.6 Sn 2.8 O 8 :R (R = Cr 3+ , Cr 3+ /Bi 3+ ) are analyzed and explained. This paper content can provide help for the improving emission of Cr 3+ doped luminescence materials.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Liandong Guo,Ting Li,Chunchun Zhu,Wenchao Liang,Lina Wu
A series of Bi 3+ or Eu 3+ ion single doped and Bi 3+ and Eu 3+ co-doped CaZnOS phosphors were synthesized via high temperature solid state method. Under ultraviolet (UV) excitation, CaZnOS: Bi 3+ has an intense emission band ranged from 400 to 600 nm owing to the 3 P 1,0 → 1 S 0 transition of Bi 3+ . And CaZnOS: Eu 3+ shows superior red emissions due to the characteristic 5 D 0 → 7 F J ( J = 1, 2, 3, 4) transitions of Eu 3+ . Tunable emission chromaticity from cyan, white, yellow to red is obtained by regulating the proportion of Eu 3+ in CaZnOS Bi 3+ , Eu 3+ . The energy transfer mechanism from Bi 3+ to Eu 3+ was confirmed to be a quadrupole-quadrupole interaction based on the overlap of emission band of Bi 3+ and excitation band of Eu 3+ combined with the luminescent lifetime measurement. In addition, CaZnOS: 2.5 mol% Bi 3+ , 3 mol% Eu 3+ phosphor with optimized concentrations has standard white light chromaticity coordinates (0.315, 0.323) and activation energy about 0.372 eV, which reflects its potential application in ultraviolet-chip excited white light emitting diodes (W-LEDs).
✓ 已验证
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2024
·
IF 3.3
Wenqi Xia,Feng Du,Qianqian Zhao,Longsheng Du,Zhihua Leng,Zuobin Tang
The exploration of efficient narrowband emission phosphors is crucial for white light-emitting diodes (WLEDs) in high-performance backlighting applications. Up to now, the discovery of narrow-band Bi 3+ -doped phosphors for emerging applications remains challenging because Bi 3+ typically exhibits broadband emission properties. A novel narrow-band blue phosphor (Ca 4 SnGe 3 O 12 :Bi 3+ ) was successfully synthesized, benefiting from the highly symmetric crystal environment and tightly connected rigid structure of the garnet structure. The phosphor demonstrates broad excitation in the near-ultraviolet (n-UV) region and emits narrowband blue light at 442 nm (FWHM = 36 nm) with a color purity of 94.7 %. In this paper, the assignment of different luminescence centers and the use of Zr/Hf to partially replace Sn to enhance luminescence performance are studied. The reasons for the consequent changes in luminescence behavior are explained in detail. The use of narrowband commercial red K 2 SiF 6 :Mn 4+ , green β-Sialon:Eu 2+ , and synthetic blue luminescent materials as RGB emitters covered 81 % of the National Television System Committee (NTSC) color space, demonstrating great potential for liquid-crystal-display (LCD) backlight use.
研究领域:
材料科学
·
光学材料
·
固态照明
·
磷光体化学
·
发光学
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY
·
2023
·
IF 4.6
Huimin Li,Ran Pang,Lihong Jiang,Da Li,Su Zhang,Hongjie Zhang
Current ultraviolet (UV) light sources are dominated by blacklights that contain mercury vapor. Improper disposal or accidental breakage of these lamps can lead to serious pollution. Phosphor-converted light-emitting diodes (pc-UV-LEDs) have the potential to replace these mercury-containing lamps, making them more environmentally friendly. To improve the adjustability of the UV emission and reduce production cost, a series of UV-emitting phosphors were developed by introducing Bi3+ in BaSc2Ge3O10 (BSGO) which has a broad bandgap of 5.88 eV. The phosphor exhibits a negative thermal quenching effect that results from thermally activated defects. Despite this, the emission intensity of the phosphor sustains up to 107% at 353 K and 93% at 473 K compared to the intensity at 298 K. The internal quantum efficiency and the external quantum efficiency reach 81.0 and 49.32%, respectively, under 305 nm excitation. A pc-UV-LEDs were fabricated by combining the phosphor with a chip. The resulting device emits a broad band ranging from 295 nm to 450 nm, covering part of the UVB (280 nm ∼ 315 nm) and UVA (315–400 nm) regions. Our work has the potential to promote the replacement of current blacklights, including high-pressure mercury lamps and fluorescent low-pressure mercury lamps, by pc-UV-LEDs in applications such as bug zappers and tanning beds. Moreover, the phosphor exhibits desirable long persistent luminescence, which extends its prospect of applications.
研究领域:
材料科学
·
光子学
·
固态照明
·
发光材料
·
光电子学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2018
·Vol. 30
·期 3
·2327-2333
·
IF 2.324
Cao Renping,Xiao Hui,Zhang Falin,Cheng Xinyu,Su Lei,Xiao Fen,Luo Zhiyang,Chen Ting
A series of CaZrO 3 :Bi 3+ , CaZrO 3 :Eu 3+ , CaZrO 3 :Eu 3+ , Bi 3+ , and CaZrO 3 :Eu 3+ , Bi 3+ , Li + phosphors are synthesized by high-temperature solid-state reaction method in air. Their luminescence properties are researched, compared, and analyzed. CaZrO 3 :Bi 3+ phosphor under excitation at 310 nm emits deep-blue light with chromaticity coordinate (0.1612, 0.0254). CaZrO 3 :Eu 3+ phosphor under excitation at 310 and 395 nm shows red-emitting with chromaticity coordinate (0.6386, 0.3611). CaZrO 3 :Eu 3+ , Bi 3+ phosphor under excitation at 310 nm exhibits a systematically varied hue from deep-blue to red light by changing Eu 3+ ion concentration, and that with excitation at 395 nm only emits red light with chromaticity coordinate (0.6386, 0.3611). The energy transfer process from Bi 3+ to Eu 3+ ions may be indicated by their spectral properties. The optimal Eu 3+ and Bi 3+ ions concentrations are 5 mol% and 0.9 mol%, respectively. The emission intensity CaZrO 3 :Eu 3+ , Bi 3+ phosphor may be enhanced about 1.6 times due to the co-doping Li + ion as charge compensator role. The luminous mechanism of CaZrO 3 :Eu 3+ , Bi 3+ phosphor is explained by the simplified energy level diagrams of Bi 3+ and Eu 3+ ions.
研究领域:
材料科学
·
无机化学
·
固体物理
·
发光材料
·
光电功能材料
✓ 已验证
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2019
·
IF 3.355
Dayu Huang,Peipei Dang,Yi Wei,Biao Bai,Hongzhou Lian,Qingguang Zeng,Jun Lin
Recently, much attention has been attracted on the optical properties based on the phosphors for LED light. A near Ultraviolet (n-UV) and blue chip activated phosphor of CaLi 6 La 2 Nb 2 O 12 :Bi 3+ , Mn 4+ is synthesized by a traditional SSR method. Phase purity and lattice structure of the crystal have been confirmed and investigated by XRD, Rietveld refinement, FE-SEM and TEM. The luminescence performances of the series phosphors are investigated by diffuse reflection spectra (DR), Raman scattering spectra, steady-state PL spectra and the measurement of lifetime., the CaLi 6 La 2 Nb 2 O 12 :Bi 3+ , Mn 4+ exhibits emission peaked at ∼466 and ∼711 nm Under excited at 312 nm. The Dq, B and C are calculated to estimate the nephelauxetic effect of Mn 4+ in [NbO 6 ] octahedral lattice. The coordinate shifting could be controllable through the energy transfer Bi 3+ →Mn 4+ , which can be verified by PL spectra and decay lifetimes. Finally, by coating the blend of red CaLi 6 La 2 Nb 2 O 12 :0.03Bi 3+ ,0.015 Mn 4+ and Y 3 Al 5 O 12 :Ce 3+ (YAG:Ce 3+ ) phosphors onto the blue LED chip, a LED device with good performances ( x = 0.36, y = 0.36, CRI = 86.6, CCT =4220 K) can be achieved. Hence, CaLi 6 La 2 Nb 2 O 12 :Bi 3+ , Mn 4+ is a good material of red emission.
研究领域:
材料科学
·
光学材料
·
发光材料
·
固态化学
·
光子学
·
LED技术
✓ 已验证
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2024
·
IF 5.3
Chenglin Gong,Lin Lin,Yingzhen Wu,Yanan Zhang,Zhuohong Feng,Zhezhe Wang,Yantang Huang,Zhiqiang Zheng
In this research, double perovskite quantum dots Cs 2 AgInCl 6 : Tb 3+ /Sm 3+ /Bi 3+ are synthesized employing a high-temperature thermal injection method. The temperature-dependent emission spectra and the fluorescence decay curves of samples show the quantum dots can be applied to dual-mode temperature sensing employing fluorescence intensity ratio technique (between 656 nm (Sm 3+ ) and 549 nm (Tb 3+ )) and fluorescence lifetime thermometry (549 nm (Tb 3+ )), achieving maximal relative sensitivities of 3.24%/K (351 K) and 0.68%/K (373 K), respectively. This study offers valuable insights into the temperature sensing capabilities of these quantum dots, which shows that these quantum dots are promising high-sensitivity dual-mode temperature sensing 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
·
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.
✓ 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.
✓ 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）