OPTICAL MATERIALS
·
2023
·
IF 3.9
Mengjia Zhang,Changchun Ding,Bin Duan,Yuxiang Wu,Yongqiang Li,Jin Wei,Fengyi Wang,Junshan Hu
The upconversion luminescence (UCL) of inorganic materials doped with activators and sensitizers has great application, but its luminescence intensity always impose restrictions on its development. Herein, an obvious enhancement in luminescence intensity of the WO 3 : Yb 3+ , Ho 3+ phosphor was realized through non-equivalence substitution of Bi 3+ ions. The single pure phase of the synthesized WO 3 : Yb 3+ , Ho 3+ , and Bi 3+ phosphors has been confirmed by the XRD pattern. The morphology of phosphors and valence state of elements have been performed by SEM and XPS techniques. The sample on excitation with 980 nm performs forceful green emission and weak red emission at 543 nm and 662 nm, separately. The concentrations for doped Yb 3+ and Ho 3+ to obtain the optimal UCL in WO 3 are 8% and 1%, respectively. The optimized doping concentration for Bi 3+ ions is 3%. Compared to samples without Bi 3+ ions, the Yb 3+ /Ho 3+ /Bi 3+ doped WO 3 obtains 1.59 and 2.33 times increase in emission intensity of green and red, respectively. We also explored the UCL mechanism and enhancement mechanism on the basis of the power dependency, the UCL and the downshift luminescence. These results based on Yb 3+ /Ho 3+ UCL phosphors research is of great significance.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2023
·
IF 3.8
Renping Cao,Jingyi Lin,Bang Lan,Fangrui Cheng,Ting Chen,Lan Li,Ru Liu,Jing Wang
Na 3 Sc 2 (PO 4 ) 3 :R (R = Bi 3+ , Sm 3+ , and Sm 3+ /Bi 3+ ) are successfully synthesized in air atmosphere. The high-temperature solid-state reaction method is used in this work. The X-ray diffractometer patterns confirm that all samples have the single pure phase Na 3 Sc 2 (PO 4 ) 3 . Na 3 Sc 2 (PO 4 ) 3 :Bi 3+ displays blue emission because of the Bi 3+ - Sc 3+ metal-to-metal charge-transfer and the 3 P 1 → 1 S 0 transition of Bi 3+ . Na 3 Sc 2 (PO 4 ) 3 :Sm 3+ shows red-orange emission with four emission bands derived from the 4 G 5/2 → 6 H 5/2 (550 - 582 nm), 6 H 7/2 (582–625 nm), 6 H 9/2 (625–675 nm), and 6 H 11/2 (675–750 nm) transitions of Sm 3+ . The optimal Sm 3+ concentration in Na 3 Sc 2 (PO 4 ) 3 :Sm 3+ is ∼8mol%. An adjustable color emission from blue to red-orange of Na 3 Sc 2 (PO 4 ) 3 :Sm 3+ , Bi 3+ with excitation at 345 nm can be observed when the ratio between Sm 3+ and Bi 3+ ions is changed. Na 3 Sc 2 (PO 4 ) 3 :Sm 3+ , Bi 3+ emits red–orange light under excitation 406 nm. The optimal Bi 3+ concentration in Na 3 Sc 2 (PO 4 ) 3 :8mol%Sm 3+ , Bi 3+ is ∼ 6mol%. The energy transfer from Bi 3+ to Sm 3+ in Na 3 Sc 2 (PO 4 ) 3 :Sm 3+ , Bi 3+ is verified by the spectral properties of samples. We discuss the influences of Bi 3+ or Sm 3+ concentration on luminescence properties of samples and analyze their luminous mechanism by energy level diagram. The experimental results of paper are useful for the research of new Bi 3+ and Sm 3+ doped phosphors.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Physical Chemistry C
·
2023
·
IF 3.7
Liang Jing,Qingmei Cen,Qi Pang,Jin Zhong Zhang
In this work, lead-free zero-dimensional (0D) all-inorganic perovskite Mn2+-doped Cs2InCl5·H2O microcrystals (MCs) with introduced Bi3+ ion were synthesized by supersaturation recrystallization at room temperature. The electronic bandgap of the MCs is tuned from ∼5.1 to ∼3.1 eV, and the electronic absorption is enhanced in the 200–400 nm region by Bi3+ incorporation. Upon excitation at 365 nm, the MCs with introduced Bi3+ exhibit strong red emission peaking at 640 nm, which is attributed to the Mn2+ transition (4T1g → 6A1g). Simultaneous Mn2+ and Bi3+ incorporation into Cs2InCl5·H2O shows 60 times enhancement of the 640 nm emission band compared to Mn2+ alone. This PL enhancement is attributed to the energy transfer (ET) from the [BiCl6]3– octahedron, which acts as a UV light absorber and exciton donor, to [MnCl6]4–. In addition, a yellow-light-emitting diode (LED) device based on the Cs2In0.45Bi0.55Cl5·H2O:17%Mn MCs was fabricated and evaluated, showing high color saturation at a drive current of 420 mA and good stability. This study demonstrates a new method for achieving efficient red emission by incorporating ns2 metal ions and Mn ions in 0D lead-free metal halides.
✓ 已验证
产品关联
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.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Yawei Jiang,Yan Mi,Chufan Li,Wenjian Fang,Xiaochuan Li,Xianghua Zeng,Yongsheng Liu,Wenfeng Shangguan
The solid solution constructed by two or more semiconductors with different bandgaps can effectively modulate the energy band, satisfying the redox potential for both H + /H 2 and O 2 /H 2 O. In this paper, Sillen-Aurivillius compounds with layered structure Bi 3 O 4 Cl and Y 3 O 4 Cl solid solution (Bi 3−x Y x O 4 Cl) were successfully synthesized by the solid-phase method. The absorption edge of Bi 3−x Y x O 4 Cl could be dramatically changed from about 500–740 nm with the increase of Bi elements, which accounted for the entire UV-Vis region of the solar spectrum. Furthermore, the bandgaps for Bi 3−x Y x O 4 Cl could be adjusted from about 2.6–2.0 eV with the decreased Y/Bi ratio from 2 to 0.2. Significantly, the conduction band minimum energy (CBM) of Bi 3−x Y x O 4 Cl all satisfied the redox potential for H + /H 2 , which showed excellent visible-light photocatalytic water splitting.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Xiao Liu,Siqi Shi,Kai Yang,Liang Chen,Degang Deng,Shiqing Xu
SrGa 2 B 2 O 7 : Bi 3+ , Eu 3+ phosphors were synthesized through high temperature solid-state method successfully. The structure, luminescent characteristics and temperature sensing properties of the phosphors are studied. Under the excitation at 363 nm, several bands of Sr 0.935 Ga 2 B 2 O 7 : 0.015Bi 3+ , 0.05Eu 3+ phosphor appeared in the blue and red regions and the emission peaks of Bi 3+ and Eu 3+ ions can be well separated. For the SrGa 2 B 2 O 7 : Bi 3+ /Eu 3+ samples, the maximum absolute temperature sensitivity ( S a ) reaches about 0.181 K −1 at 473 K and the relative temperature sensitivity ( S r ) of that is up to 1.549% K −1 at 423 K. The results originated from the characteristic transitions of Bi 3+ ( 3 P 1 → 1 S 0 ) and Eu 3+ ( 5 D 0 → 7 F 1 , 5 D 0 → 7 F 2 , 5 D 0 → 7 F 4 ) ions are based on the fluorescence intensity ratio (FIR). Furthermore, the maximum of S a is 4.66 K −1 and the maximum of S r is 0.538% K −1 at 293 K based on the fluorescence lifetime temperature measurement method. All these investigations indicate that the SrGa 2 B 2 O 7 : Bi 3+ /Eu 3+ phosphors can be a promising optical thermometric material in the field of temperature sensing.
研究领域:
材料科学
·
光学传感器
·
发光材料
·
测温技术
✓ 已验证
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2026
·
IF 3.8
Feiyan Xie,Junqiang Gu,Shengqian Wang,Dekang Xu,Qiancheng Xiong,Run Zhu,Jiayi Gu,Jinyu Yang
The optical thermometry method based on fluorescence intensity ratio (FIR) technology has emerged as a research hotspot in the field of temperature sensing in recent years due to its prominent advantages such as high sensitivity and operational convenience. In this work, a series of novel NaGd 2 Ga 2 InTi 2 O 12 : x Bi 3+ , y Eu 3+ (abbreviated as NGGIT: x Bi 3+ , y Eu 3+ ) optical thermometric phosphors were developed, and their crystal structures, optical properties, and temperature-sensing characteristics were systematically and in-depth characterized and analyzed. Under excitation at 310 nm, Bi 3+ emitted a characteristic broadband green luminescence centered at 500 nm with the optimal doping concentration determined to be x = 1.5%, and the introduction of Eu 3+ into NGGIT:Bi 3+ enabled the construction of an efficient Bi 3+ -Eu 3+ energy transfer channel. Crucially, Bi 3+ and Eu 3+ exhibited significantly differentiated thermal quenching behaviors during temperature variation, laying an excellent foundation for FIR thermometry. The thermometric performance of NGGIT:1.5%Bi 3+ ,0.25%Eu 3+ phosphor was evaluated using FIR technology, and the results showed that its maximum absolute sensitivity ( S a ) and relative sensitivity ( S r ) reached 2.61% K −1 and 2.60% K −1 , respectively, accompanied by distinct luminescent color transition with temperature changes. This study demonstrated NGGIT:Bi 3+ ,Eu 3+ phosphors possessed excellent temperature-sensing performance and held broad application prospects in FIR-based non-contact thermometry.
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Quanle Cheng,Ruoshan Lei,Huanping Wang,Xingjie Song,Denghao Li,Shilong Zhao
Cyan-emitting LEDs are critical for advanced solid-state lighting, yet conventional phosphor-converted devices face thermal and encapsulant issues. All-solid-state transparent ceramics are promising alternatives, but cyan-emitting ones remain largely unexplored. Herein, novel cyan-emitting Bi 3+ :Y 2 O 3 transparent ceramics were prepared via vacuum sintering. The samples exhibit a dense microstructure, high visible transmittance, strong UVC/UVB shielding, and excellent mechanical properties. Bi 3+ occupies C 2 and S 6 lattice sites, producing dominant cyan (495 nm, C 2 ) and weak violet (423 nm, S 6 ) emissions under 332 nm excitation. The two emissions show distinct thermal responses due to thermally activated energy transfer from C 2 to S 6 , and the sample retains 75% of its intensity at 373 K with stable cyan color. The ceramic-based LED exhibits bright cyan emission, eliminating the aging issues of phosphor-converted devices. This work demonstrates the potential of Bi 3+ : Y 2 O 3 transparent ceramics for cyan-emitting LEDs in low-light and medical applications, as well as UV-shielding windows.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Dan Zhang,Taifang Zhang,Jingxi Li,Bibo Lou,Peng Wang,Chonggeng Ma
Currently, the development of innovative, efficient phosphors featuring near-ultraviolet excitation and broadband emission, notably Bi 3+ -activated phosphor, is pivotal for realizing high-performance white light-emitting diodes (WLEDs). In this work, we report a series of broadband orange-green emitting YBaZn 3- y Mg y GaO 7 : Bi 3+ phosphors with strong n-UV excitation. By employing cationic substitution, we successfully tuned the emission wavelength from 605 to 550 nm, thereby unlocking potential for multifunctional applications in solid state lighting and information encryption. YBaZn 3 GaO 7 : 0.015Bi 3+ phosphor generates 605 nm orange emission with a full width at half-maximum (FWHM) of 220 nm under 330 nm n-UV excitation, with high luminescence intensity and excellent thermal stability. In addition, the luminescence mechanism of Bi 3+ ions in YBaZn 3- y Mg y GaO 7 : Bi 3+ was investigated thoroughly. A high-performance W-LED device has been fabricated, utilizing a unique YBaZn 3 GaO 7 : 0.015Bi 3+ phosphor and commercial blue and green phosphors, pumped by a 365 nm chip. This phosphor-converted (pc) WLED has an excellent color-rendering index (R a ) of 95.6 and a comfortable correlated color temperature (CCT) of 5193 K. This result indicates its potential applications in the field of health lighting. Furthermore, the orange-green YBaZn 3- y Mg y GaO 7 : Bi 3+ phosphor demonstrates precise information identification in information encryption, confirming its potential in this field.
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
·
2025
·
IF 5.6
Tao Su,Yue Zhong,Jing Xie,Yang Li,Xianze Li,Wenming Wang,Yan Pan,Xiantao Wei,Yong Li
Bi 3+ and Eu 3+ co-doped Ba 2 Sc 2 B 4 O 11 phosphors with near-white emission were successfully synthesized via a conventional solid-state reaction route. This work systematically investigates the microstructure, band structure, photoluminescence, and chromaticity coordinates of Ba 2 Sc 2 B 4 O 11 phosphors doped individually with Bi 3+ or Eu 3+ , as well as co-doped with both ions. The Bi 3+ -doped phosphors exhibits cyan emission, while co-doping with Bi 3+ /Eu 3+ achieves near-white emission. Intriguingly, the relative intensities of Eu 3+ magnetic dipole ( 5 D 0 → 7 F 1 ) and electric dipole ( 5 D 0 → 7 F 2 ) transitions exhibit excitation-dependent behavior. Under 266 nm excitation, the magnetic dipole transition dominates, whereas the electric dipole transition prevails under 355 nm excitation. Furthermore, the relative sensitivity of the dual-emission centers (Bi 3+ and Eu 3+ ) was quantitatively analyzed. The results demonstrate that the Ba 2 Sc 2 B 4 O 11 : Bi 3+ , Eu 3+ phosphor exhibits promising sensing performance, suggesting its potential as a candidate for optical temperature sensing applications.
✓ 已验证
产品关联
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2025
·
IF 4.6
Xucai Zhao,Qingqing Yu,Lili Zhang,Rongfei Wei,Hai Guo
As emerging anti-counterfeiting materials, persistent luminescence (PersL) materials have attracted much attention owing to their particular luminescent properties, including durable luminescence, facile identification, high security and environment-friendly. Especially, exploiting color-tunable dynamic afterglow materials that facilitate the use of advanced technology such as multi-mode dynamic anti-counterfeiting remains of great realistic significance. Herein, a series of Ba 0.95 Sr 0.05 Ga 2- y Gd y O 4 :Bi 3+ phosphors with tunable photoluminescence and PersL were synthesized by the cationic substitution strategy. The displacement of Ga 3+ by Gd 3+ induces an additional blue emission owing to the generation of a new Bi 3+ luminescence center. The pure white light is realized in Ba 0.942 Sr 0.05 Ga 1.9 Gd 0.1 O 4 :0.8 %Bi 3+ ,0.25 %K + when excited by 325 nm light. Besides, color-tunable emission is triggered by changing the excitation wavelength or temperature. Significantly, excellent room-temperature PersL and dramatically intensified PersL with tunable color output under thermal stimulation are clearly discernible. Such properties result from the existence of multiple Bi 3+ luminescent centers and traps. These findings open up new ideas to produce color-tunable dynamic PersL materials for advanced anti-counterfeiting, information storage and 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 ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Shuzeng Zhang,Yang Ding,Teng Zhang,Kangrui Qiang,Pengcheng Wu,Xiaoqian Zhang,Jiasong Zhong
The utilization of phosphors for information storage, data encryption, temperature sensing, etc. has been becoming a research hotspot. However, modulating dynamic and pluralistic phosphor emissions is still a huge challenge. Herein, we developed a Li + -induced site occupation engineering in Bi 3+ activated Mg 2 SnO 4 (MSO) phosphor with multiple emissions and dynamic afterglow for versatile applications. Experiments and first-principles calculations demonstrated that Bi 3+ would simultaneously enter [MgO 4 ] tetrahedron and [SnO 6 ] octahedron to present red and blue emissions, respectively. As Li + ions were introduced into Mg 2 SnO 4 :Bi 3+ , the preferably generated [LiO 4 ] could hinder the Bi 3+ from entering [MgO 4 ] units, so as to force Bi 3+ to substitute Sn 4+ in [SnO 6 ], thereby leading to strengthened blue emission. Due to the distinct luminescence decay of Bi 3+ in tetrahedron and octahedron units, the luminescence colors were regulated from blue to purple and red with enhancing temperature upon UV light excitation, being suitable for luminescence intensity ratio (LIR) thermometer. Moreover, by virtue of the afterglow properties originating from the inherent oxygen vacancies of Mg 2 SnO 4 , the dynamic information encryption and anti-counterfeiting by Mg 2 SnO 4 :Bi 3+ , Li + were achieved. The proposed site occupation engineering can certainly spur several innovative ideas in manufacturing high-performance phosphors for versatile applications.
研究领域:
材料科学
·
光学工程
·
计算化学
✓ 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）