COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
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IF 5.4
Bin Li,Yingfang Li,Bin Cao,Chong Yang,Rongbo Ma,Chaoyong Deng,Weichao Huang
The high-temperature solid-state method synthesized novel double perovskite CaSrLaSbO 6 : Bi 3+ , Mn 4+ phosphors. Its crystal structure, luminescence properties, crystal field strength, energy transfer process, and temperature-sensitive properties were comprehensively investigated. The band gap values of CaSrLaSbO 6 were calculated using density functional theory. In the CaSrLaSbO 6 host, Bi 3+ exhibits multiple emission properties in the violet, blue, and NIR regions due to the 3 P 1 → 1 S 0 transition, while the red emission is due to the 2 E g → 4 A 2g transition of Mn 4+ . Light-converting films fabricated using CaSrLaSbO 6 :Bi 3+ , Mn 4+ under 302 nm UV excitation with multiple emissions showed significant plant growth promotion. In addition, the optical temperature-dependent response of CaSrLaSbO 6 : Bi 3+ , Mn 4+ was analyzed using the luminescence intensity ratio technique, and the relative sensitivity of the best samples reached 2.1 % K −1 . The above results indicate that CaSrLaSbO 6 : Bi 3+ , Mn 4+ provides almost all the light sources necessary for plant growth and can be applied in the field of optical temperature sensors, which shows that this multifunctional phosphor has great potential for application.
研究领域:
材料科学
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植物学
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光学工程
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产品关联
DOI
高影响因子
Journal of Physical Chemistry C
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2021
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IF 4.126
Qiaohui Liao,Qian Meng,Liang Jing,Jiamin Pang,Qi Pang,Jin Zhong Zhang
In this study, a facile approach is used to enhance the broad orange emission efficiency and stability as well as monodispersity of Cs2AgInCl6 nanocrystals (NCs) via doping Bi3+ and surface passivation with potassium bromide. While the pristine Cs2AgInCl6 NCs show an excitonic absorption peak at 280 nm, the doped NCs have an additional absorption peak at 365 nm, which is attributed to direct bismuth s–p transition. Compared to the low photoluminescence (PL) quantum yield (QY) of 0.04% for the pristine Cs2AgInCl6 NCs due to parity forbidden transition, the doped NCs show a PLQY of 5.82%, a significant improvement due to breaking of the parity forbidden transition. The PLQY can be further increased to 8.59% for Cs2AgIn0.9Bi0.1Cl6 when passivated with KBr. This work demonstrates that the combination of doping and surface passivation can substantially improve the PL of the Cs2AgInCl6 double perovskite. A model is proposed to explain the observed enhancement in PL and stability.
研究领域:
材料科学
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光学
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·Vol. 51
·期 26
·51467-51475
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IF 5.6
Wenjie Wang,Jianyan Ding,Quansheng Wu
In recent years, multi-mode fluorescent anti-counterfeiting technology has been regarded as a promising replacement for traditional single-fluorescent-pattern-based methods in ensuring information security. This advancement necessitates phosphors with multi-mode photoluminescent properties. In contrast to the conventional complex approach involving the integration of downshifting and upconversion phosphors, this study demonstrates the achievement of multiple visible-light emissions in Bi 3+ -activated scandium silicate NaSrScSi 2 O 7 , which exhibits sensitivity to near-ultraviolet light. Under the excitation at 370 nm, Bi 3+ -activated NaSrScSi 2 O 7 emits a narrow-band blue light, yet it can emit a broad-band cyan light under the excitation at 340 nm. The significant photoluminescence property of Bi 3+ ion is proved to originate from special crystal structure of NaSrScSi 2 O 7 , which provides multiple crystallographic sites for accommodating Bi 3+ ion. Benefiting from the characteristic of NaSrScSi 2 O 7 , the sample performs excellent thermal and chemical stability. A warm WLED device has been fabricated by using as-prepared sample. Finally, a pattern produced by Bi 3+ -activated NaSrScSi 2 O 7 is proved to emit distinguishing visible light under the common 365 nm and 340 nm near-ultraviolet lamp, which is considered to pave a simple approach for realizing high-level fluorescent anti-counterfeiting technology.
研究领域:
材料科学
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光学材料
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固态化学
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发光学
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防伪技术
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产品关联
DOI
高影响因子
Advanced Materials Technologies
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2024
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IF 6.4
Hailin Zhou,Zexiang Liu,Xiangyan Yun,Hanlin Hu,Haizhe Zhong,Henan Li,Yumeng Shi
Lead-free 0D In-based organic–inorganic metal halides (OIMHs) have attracted tremendous attention because of their nontoxicity, environmental stability, and excellent photoluminescence properties. However, it remains controversial and unclear whether the luminous division exists in ns 2 doping In-based materials, as the majority of In-based materials are considered non-luminous. Herein, a series of Bi 3+ -doped (TEA) 2 InCl 5 (TEA = tetraethylammonium) crystals are synthesized and it is determined that the blue emission stemmed from Bi ions. Remarkably, the photoluminescence quantum yield (PLQY) of the blue emission at 469 nm reached 69.69% under 371 nm excitation, exceeding those of previously reported Bi 3+ -doped OIMHs. In addition, pristine and Bi 3+ -doped compounds exhibited excellent structure and optical stability under humid conditions. This study provides new insights into the photoluminescence properties of In-based OIMHs, especially regarding the high-efficiency emission of Bi 3+ -doped materials.
研究领域:
材料科学
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光电
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化学
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DOI
高影响因子
INORGANIC CHEMISTRY
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2021
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IF 5.165
Ruxin Liu,Wenjun Zhang,Wenjing Liu,Guojing Li
Lead-free perovskites have been widely studied due to their environmental friendliness and high stability. In this study, Bi3+-doped Cs2HfCl6 has been synthesized at room temperature. Different from the emission of the Cs2HfCl6 host (452 nm), Bi3+:Cs2HfCl6 can produce a bright blue emission at an excitation wavelength of 350 nm, which is derived from the 3P1 → 1S0 transition of Bi ions and accompanied by the properties of self-trapped excitons. Moreover, 7%Bi3+:Cs2HfCl6 shows excellent stability with the photoluminescence quantum yield reaching up to 69.08%. Meanwhile, a light-emitting diode that is close to pure white light has been fabricated by using 7%Bi3+:Cs2HfCl6, which has a high color rendering index of 92.5. These results show that Bi3+:Cs2HfCl6 would be a potential candidate in the field of inorganic luminescent materials.
研究领域:
材料科学
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光电
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光子学
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DOI
PubMed
高影响因子
DALTON TRANSACTIONS
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2022
·Vol. 51
·期 17
·6908-6917
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IF 4.569
Xuexia Chen,Ran Pang,Shangwei Wang,Jiangyue Su,Weihong Yuan,Shengjian Jiao,Haiyan Wu,Da Li,Chengyu Li,Hongjie Zhang
Bi3+ has gained increasing attention due to its abundant reserves, adjustable luminous colour and high chemical stability, therefore, Bi3+-activated luminescent materials have already been extensively applied in various fields. Herein, a novel blue-emitting CaNaSb2O6F:Bi3+ (CNSOF:Bi3+) phosphor with a pyrochlore-type structure with the space group Fdm (277) was successfully synthesized. It exhibits a broad absorption band in the n-UV region (290–390 nm) and an ideal blue emission band centered at 441 nm. Interestingly, the wide emission peak of CNSOF:Bi3+ shows strongly temperature-dependent fluorescence properties and good thermal degradation resistance in the cycle temperature range from 298 K to 473 K, and the relative sensitivity is calculated to reach the maximum value of 2.34% K−1 at 423 K. Besides, the phosphor is different from a traditional optical temperature sensing material which shows the emission peak of trivalent rare earth ions. The wide emission peak makes the instrument insensitive to the peak shift, which dramatically reduces the requirement of the instrument, and the emission peak does not shift with the temperature to enhance the measurement stability, thus saving the cost. These results indicate that the CNSOF:Bi3+ blue emitting phosphor has potential applications in temperature sensing.
研究领域:
材料科学
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无机化学
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光电子学
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功能材料
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传感器技术
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DOI
高影响因子
Laser & Photonics Reviews
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2025
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IF 10
Xiulan Shui,Shuangqiang Fang,Tianchun Lang,Haoliang Cheng,Jiaqi Ou,Jiali Yu,Jing Ma,Tiancheng Zhang,Le Wang
The development of low-cost, rare-earth-free light conversion materials is critical for sustainable agriculture. Herein, we report a Bi 3+ /Mn 2+ co-doped lead-free double perovskite Cs 2 Ag 0.8 Na 0.2 InCl 6 synthesized via an environmentally friendly mechanochemical method. The phosphor exhibits a broad-spectrum emission (400–800 nm) with a full width at half maximum (FWHM) of 206 nm, attributed to the synergistic effect of Bi 3+ -activated self-trapped excitons (STEs) and Mn 2+ 4 T 1 → 6 A 1 transitions. Bi 3+ doping not only extends the absorption range to the UVA region (350–400 nm) but also enhances the photoluminescence quantum yield (PLQY) to 99.3% through Bi 3+ →STE and Bi 3+ →Mn 2+ energy transfer. A sunlight conversion film fabricated by incorporating the phosphor into Ecoflex-0031 silica gel shows excellent mechanical stability (tensile elongation retained over 16 days) and environmental durability. Plant growth experiments with chives and hydrocotyle vulgaris demonstrate significant improvements under the film: chive stem length increased by 136%, hydrocotyle leaf width by 37%, and fresh weight by 17%. This work highlights the potential of Bi 3+ /Mn 2+ co-doped perovskites as efficient, low-cost light conversion agents for energy-saving agricultural cultivation film.
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Jiale Zhang,Chengyue Xin,Ming Ma,Wenjun Zhang,Zihan Chen,Ying Gao,Dan Wang
Conventional materials with single emission centers face limitations in emission tunability and anti-counterfeiting security. Thermochromic-induced reversible luminescence modulation offers an effective approach for multi-level optical encryption. In this work, we demonstrate an information‐encryption strategy based on a vacancy-ordered perovskite that undergoes reversible, delayed luminescence shifts. Blue-emitting Bi 3+ -doped Cs 2 ZrCl 6 crystals were synthesized via a facile precipitation method and exhibit dual emission centers under different excitations. Under 365 nm excitation, the Bi 3+ emission at 465 nm undergoes a thermochromic‐induced red shift to 500 nm upon annealing at 110–180 °C; this visibly distinct green state persists for seven days at room temperature and fully reverts to blue over ≈40 days. In contrast, the intrinsic Cs 2 ZrCl 6 self-trapped-exciton emission at 254 nm excitation remains constant, providing an internal reference for enhanced anti-counterfeiting security. Comprehensive photoluminescence and UV–Vis diffuse-reflectance analyses reveal that annealing modulates the band gap via Bi 3+ -induced intermediate states, thereby driving the reversible emission shift without altering crystal structure or oxidation states. By incorporating the Bi 3+ -doped Cs 2 ZrCl 6 powder into conventional screen-printing ink (5:1 mass ratio), we fabricate nearly invisible security patterns that switch from blue to green under 365 nm UV after heating and automatically recover, enabling multi-cycle thermal encryption. This study not only elucidates the band-gap–mediated mechanism of thermochromic luminescence in lead-free perovskites but also establishes a versatile platform for next-generation, reversible optical security and anti-counterfeiting applications.
研究领域:
材料科学
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光学物理
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纳米技术
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固态化学
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信息安全
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Shuzeng Zhang,Yang Ding,Zhixue Li,Kangrui Qiang,Chunhua Wang,Ning Han,Meijiao Liu,Jiasong Zhong
Long afterglow phosphors for optical information storage and anti-counterfeiting applications have attracted increasing attention due to their inherent atom defects triggered persistent emission properties. However, precisely modulating the defect concentration and trapping energy level distribution in phosphors is still a huge challenge, let alone understanding the relationship between the defect concentration/position and afterglow behavior. Herein, we reported the Bi 3+ induced oxygen vacancy engineering in MgGa 2 O 4 (MGO) phosphor for controlled afterglow and dynamic multimode emissions. A variety of spectrum characterizations and theoretical calculations confirmed that doping with a higher concentration of Bi 3+ leads to more oxygen defects in MGO host. Specifically, increasing oxygen defects can result in a gradually enhanced ratio of shallow trap and decreased ratio of deep trap in the band gap of MGO phosphor, being responsible for the modulated afterglow behaviors. Moreover, the abundant trapping state also induced dynamic luminescence performance upon persistent UV light irradiation. By virtue of the fantastic afterglow and dynamic luminescence emission properties, optical storage and information encryption applications of the prepared MGO:Bi 3+ phosphors were developed. The vacancy engineering for tunable multimode emission proposed in this work can spur several new ideas and concepts in designing advanced phosphors for multifunctional optoelectronic applications.
研究领域:
材料科学
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光电子学
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固体化学
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功能材料
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光学工程
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产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
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2019
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IF 2.961
Hai Guo,Zhigang Zheng,Liming Teng,Rongfei Wei,Fangfang Hu
In this paper, a series of Bi 3+ and Eu 3+ single-doped as well as Bi 3+ ,Eu 3+ co-doped Ba 9 Y 2 Si 6 O 24 samples were synthesized through a simple high-temperature solid-state reaction method. Their crystal structures, morphologies, luminescent properties, temperature-dependent emission spectra , decay curves and quantum efficiencies were investigated in detail. Upon ultraviolet light excitation, Bi 3+ single-doped samples exhibited blue and green emissions peaking at 408 and 501 nm, corresponding to the 3 P 1 – 1 S 0 transition of Bi 3+ ions. The spectral analysis indicated that there were two different luminescent centers of Bi 3+ ions due to different occupancies in Ba 9 Y 2 Si 6 O 24 host lattice. And the highest quantum efficiency can reach 64.5% in Ba 9 Y 2 Si 6 O 24 :0.024Bi 3+ phosphor. The remarkable spectral overlap between the emission spectra of Bi 3+ ions and the excitation spectra of Eu 3+ ions indicated the exist of energy transfer from Bi 3+ to Eu 3+ . The efficient energy transfer from Bi 3+ to Eu 3+ has been investigated in detail and resulted in that tunable and white-light emission can be obtained by modulating Eu 3+ doping concentration. White emission can be realized with the CIE coordinates of (0.357, 0.345) and quantum efficiency of 57.6% for Ba 9 Y 2 Si 6 O 24 :0.024Bi 3+ ,0.02Eu 3+ . The above results demonstrate that Ba 9 Y 2 Si 6 O 24 :Bi 3+ ,Eu 3+ may be a potential candidate for ultraviolet (UV) driven white light-emitting diodes (w-LEDs).
研究领域:
材料科学
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光电
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光子学
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产品关联
DOI
高影响因子
ENERGY & FUELS
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2024
·
IF 5.2
Lihao Zheng,Juntao Shi,Gaoya Ren,Tiantian Tang,Yefeng Yang,Shenghui Shen,Zhujun Yao
Sulfide solid electrolytes have emerged as highly promising candidates for an all-solid-state battery, while phosphorus-free compounds with air stability have not gotten enough attention. In this study, we focus on an air-stable compound, Li4SnS4, whose structure can be adjusted by Bi3+ doping through the combination of a two-step ball milling method and thermal annealing. The successful substitution of Sn4+ by Bi3+ with lower valence and larger ionic radius results in the enhancement of Li+ concentration in electrolytes and lattice volume, benefiting the Li+ migration. Therefore, the modified glass-ceramic Li4.025Sn0.975Bi0.025S4 exhibits an ionic conductivity of 1.35 × 10–4 S cm–1 at room temperature, which is twice as high as that of pure Li4SnS4. Moreover, the soft acid characteristic of Bi3+ can further ensure the air stability of Li4SnS4 based on the hard and soft acid and base theory. The findings revealed from this research provide a potential avenue for improving the performance of air-stable Li4SnS4 solid-state electrolytes for future large-scale applications.
研究领域:
材料科学
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电化学
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能源存储
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）