Advanced Optical Materials
·
2025
·Vol. 13
·期 14
·2403472
·
IF 7.2
Hongzhen Liu,Yuhe Shao,Chao Dou,Jing Zhao,Zhen Song,Quanlin Liu
Mechanoluminescence (ML) materials can convert mechanical energy into photoelectrons and have significant potential for applications in intelligent sensing, self-driven luminescent displays, and human-computer interaction. Among the numerous ML systems, Mn 2+ -doped wurtzite-based phosphors have become a prominent ML family. However, their ML emissions are typically confined to visible light, which substantially limits their utility in fields such as biomechanics and bioimaging. Here, it is demonstrated that the photoluminescence (PL) and ML emission of CaZnOS:Mn 2+ can be tuned from the red to near-infrared light (peaked at 770 nm) by regulating the Mn 2+ ion concentration. The electronic paramagnetic resonance, PL lifetime, and various spectra reveal that the near-infrared emission originates from the enhanced magnetic interaction of Mn 2+ pairs due to intrinsic defects. The heavy Mn 2+ -doped CaZnOS elastomer with near-infrared ML emission exhibits distinct advantages over low Mn 2+ -doped CaZnOS with only red emission in the field of biomechanical imaging. This work achieves near-infrared emission in CaZnOS phosphors singly doped with Mn 2+ ions for the first time, providing a perspective for spectra broadening of Mn 2+ ions-doped phosphors.
研究领域:
材料科学
·
光学
·
生物医学工程
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DOI
高影响因子
Advanced Optical Materials
·
2023
·Vol. 11
·期 8
·2203031
·
IF 9
Zhongyuan Li,Bin Li,Wuqi Liu,Dong Yan,Qiang Tang,Zhen Fang,Rong-Jun Xie
Mn 2+ -activated halide double perovskites (HDPs) are found to show promising luminescent behavior and have great potential for optoelectronic applications. However, such interesting materials hitherto are only limited to compounds with a monotonous three-dimensional structure and show a low photoluminescence quantum yield (PLQY). Herein, an Mn 2+ -doped two-dimensional (2D) layered HDP PPA 4 NaInCl 8 (PPA + = C 6 H 5 (CH 2 ) 3 NH 3 + ) showing promising photoluminescence properties is reported. The large separation between the adjacent inorganic sheets and the good dissolution of Mn 2+ in the layered structure endow PPA 4 NaInCl 8 :Mn 2+ with efficient red emission and a record PLQY of 69.90%. The spectroscopic analyses and density functional theory calculations indicate that the inherent absorption and luminescence stem from the inserted organic cations PPA + in PPA 4 NaInCl 8 . An energy transfer process occurs between the singlet excitons from PPA + and Mn 2+ , resulting in tunable emission accompanied by the variation of Mn 2+ concentration. These results provide several new fundamental insights on doping and doped 2D layered HDPs, which enhances the understanding of structure−property relations in this important family.
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DOI
高影响因子
ENERGY & FUELS
·
2024
·
IF 5.2
Renfeng Wang,Wenyan Chen,Churui Zhang,Ruizheng Zhao,Xianfen Wang
Aqueous zinc ion batteries (AZIBs) are limited by low energy density and poor cycle life. Electrolyte engineering is one of the most effective approaches to address the challenges. In this study, MnSO4 was selectively incorporated into the cost-effective hybrid electrolyte (ZnSO4+K2SO4, Zn0.5K0.25) to improve the energy density and lifespan. Ex situ techniques of XRD and SEM confirmed the electrodeposition of Mn2+ into porous MnO2 nanosheets and uniformly covered the Prussian blue cathode surface, forming the nanoporous//3D open framework interface with improved kinetics. Furthermore, the porous MnO2 nanosheets also contributed to the improved capacity, rate performance and cycling stability. The performance was noteworthy with a discharge capacity of 365.4 mAh g–1 (0.5 A g–1) and 156.7 mAh g–1 (3.0 A g–1). The capacity retention reached a remarkable 120% after 1200 cycles. Additionally, the full cell exhibited a high energy density of 299.3 Wh kg–1. These findings provide valuable insights for improving the energy density and cycle stability of AZIBs.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2013
·Vol. 1
·期 27
·4209-4215
·
IF 0
En-Hai Song,Sha Ding,Ming Wu,Shi Ye,Fen Xiao,Guo-Ping Dong,Qin-Yuan Zhang
Temperature-tunable intense yellow upconversion luminescence has been demonstrated in perovskite nanocrystals KZnF3:Yb3+,Mn2+ upon excitation with a 976 nm laser diode. The broad yellow luminescence band is centered at 585 nm and identified as the 4T1g(G) → 6A1g (S) transition of Mn2+. An upconversion luminescence mechanism based on exchange coupled Yb3+–Mn2+ dimer is proposed and the upconversion process consists of a sequence of ground state absorption (GSA)/excited-state absorption (ESA) steps. To understand thermal quenching behavior, temperature dependent upconversion luminescence of KZnF3:Yb3+,Mn2+ during heating and cooling cycles have been investigated. Results show the yellow upconversion luminescence can be seen by the naked eyes at temperatures up to 573 K and the thermal quenching is reversible. The intense yellow upconversion nanocrystals KZnF3:Yb3+,Mn2+ might find potential applications in the fields of lighting, temperature sensing, biomedical imaging and solid state lasers.
研究领域:
材料科学
·
纳米技术
·
光学材料
·
发光学
·
光子学
✓ 已验证
DOI
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Xiaolei Zhu,Xiaoping Wang,Xianke Sun
Bi 3+ /Tb 3+ /Mn 2+ -activated SrZnSO phosphors were prepared to investigate their luminescence characteristics. The SrZnSO:Bi 3+ , SrZnSO:Mn 2+ and SrZnSO:Tb 3+ phosphors, excited by the NUV/blue light, show blue, orange and green emissions, respectively. The Bi 3+ → Tb 3+ , Tb 3+ → Mn 2+ and Bi 3+ → Mn 2+ energy transfer processes take place in Bi 3+ /Tb 3+ -, Tb 3+ /Mn 2+ -, Bi 3+ /Mn 2+ - and Bi 3+ /Tb 3+ /Mn 2+ -activated SrZnSO phosphors, which result in tunable luminescence of these phosphors. The CIE coordinates were calculated on the basis of the emission spectra, and they reflect the emission color changes of phosphors. For the Bi 3+ /Tb 3+ -, Tb 3+ /Mn 2+ - and Bi 3+ /Mn 2+ - activated SrZnSO phosphors, the emission points are located in the cyan, yellow and white light regions, respectively. For the Bi 3+ /Tb 3+ /Mn 2+ -activated SrZnSO phosphors, the light is in warm white light region.
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DOI
高影响因子
CRYSTENGCOMM
·
2022
·Vol. 24
·期 9
·1803-1811
·
IF 3.756
Kaiwen Hu,Yongfei Hu,Tan Li,Fen Qiao,Yunxia Chen,Jianjun Han,Lee Li,Ghafar Ali,Yi Xie
Doping Mn2+ ions into lead halide perovskite (LHP) nanocrystals (NCs) has attracted great attention in the optoelectronic fields due to the stability enhancement and unique dual-color emission characteristics arising from the energy transfer from the LHP host to the dopants (i.e., Mn2+ ions). Herein, we report a facile and scalable synthetic protocol for Mn2+-doped CsPbCl3 and CsPbBrxCl3−x nanoplates via a one-pot room-temperature (RT) procedure in the presence of hexamethyldisilazane (HMDS). It is noteworthy that both HMDS and Mn2+ ions play a critical role in triggering the crystallization of the Mn-doped LHP NCs under ambient conditions by functioning as a passivation agent with Lewis base groups that coordinate with Pb2+ ions. The optical properties including the emission wavelength and the relative PL intensity of the band-to-band emission and the Mn2+ emission are tuned by changing the amount of HMDS and the precursor ratios Mn : Pb and Br : Cl. It is interesting that the representative Mn-doped CsPbCl3 NCs displayed enhanced thermal stability, which was confirmed by the observation that the emission intensity of the sample annealed below 95 °C for 2 h increases compared with that of the fresh sample. Ion exchanges between not only Cl−, Br− and I− but also Mn2+ and Pb2+ are also investigated.
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高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2023
·Vol. 33
·期 32
·2301372
·
IF 19
Leipeng Li,Chongyang Cai,Xiaohuan Lv,Xingqiang Shi,Dengfeng Peng,Jianrong Qiu,Yanmin Yang
Owing to the forthcoming global energy crisis, the search for energy-saving materials has intensified. Over the past two decades, mechanically induced luminescent materials have received considerable attention as they can convert waste into useful components, for instance, the conversion from stress into light. However, this material features many constraints that limit its widespread application. Herein, a strategy to improve the mechanoluminescence (ML) of ZnO by embedding it in a ZnF 2 :Mn 2+ matrix is introduced. Upon dynamic excitation via an external stress, the reddish-yellow ML is confirmed to originate from the 4 T 1 (4G) → 6 A 1 (6S) transition of the optically active Mn 2+ center. Moreover, the sample with the strongest ML contains the appropriate amount of ZnF 2 (ZnF 2 :ZnO = 7:3). By performing density functional theory calculations, a possible ML-enhancement mechanism is elucidated, which indicates the formation of a ZnF 2 /ZnO:Mn 2+ heterojunction. Considering the unique characteristics of ML, its promising applications are demonstrated in various mechano-optics scenarios, including flexible and stretchable optoelectronics, advanced self-powered displays, e-skins/e-signatures, and anti-counterfeiting, without the use of external light/electric-incentive sources. The study significantly increases the variety of ML materials and is expected to strengthen the foundation for the future development of smart mechanically controlled devices and energy-saving systems.
研究领域:
材料科学
·
光学
·
力学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Longchao Guo,Ting Wang,Qingyuan Wang,Wei Feng,Ziyang Li,Shaoqing Wang,Ping Xia,Feng Zhao,Xue Yu
Fluorescent materials have been employed in the field of anti-counterfeiting thanks to their feasible and flexible design approach, visualization feature, and handy identification. However, versatile fluorescent materials are still eager to be developed for advanced information security. Here, an efficient temporal and spatial anti-counterfeiting strategy is proposed with the multi-response behaviors from the as-explored transition metal and lanthanide ions doped BaZnOS phosphors under distinct stimulus. Diverse optical performance of the corresponding phosphor with the irradiation of X-ray, ultraviolet (UV), and near-infrared laser as well as the stimulation of stress and temperature endows a spatial anti-counterfeiting strategy. Moreover, with the cooperation of the photo-stimulated and up-conversion behaviors, a temporal anti-counterfeiting could be achieved elaborately. Herein, this work not only gives an insight to understand the multi-dimensional response of the corresponding tailored phosphor under distinct exterior stimulations, but also provides a feasible and facilitated way to address the counterfeit issues accordingly.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
高影响因子
Joule
·
2025
·
IF 35.4
Xinran Li,Tengsheng Zhang,Gaoyang Li,Boya Wang,Hongrun Jin,Yanyan Zhang,Xin Liu,Yutong Feng,Yifeng Wang,Wanhai Zhou,Jingwen Zhao,Wei Li,Hongjin Fan,Dongyuan Zhao,Dongliang Chao
Aqueous manganese ion batteries (AMIBs) have recently garnered attention due to the abundance of manganese and their intrinsic safety. However, the development of current AMIBs remains plagued by restrictive actual capacities. Herein, we propose an energetic Mn 2+ -S redox electrochemistry with a solid-liquid-solid redox pathway. Operando X-ray absorption fine spectroscopy and synchrotron X-ray diffraction unveil the Mn 2+ storage mechanism of S 8 ↔ MnS 4 ↔ MnS 2 ↔ MnS. A capacity of 1,242 mAh g −1 with a high sulfur utilization of 74.3 wt % can be achieved, surpassing the capacity limitations of previously reported AMIBs. As a proof of concept, a system intergrating the S/MnS and MnO 2 /Mn 2+ redox couples delivers an energy density of 396 Wh kg S+MnO2 −1 and cycles for 800 cycles stably at 4 A g −1 . We have elucidated the mechanism underlying the redox of Mn 2+ -S and may open an avenue for the next high-energy AMIBs.
研究领域:
材料科学
·
电化学
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2024
·Vol. 35
·期 29
·1-12
·
IF 2.8
Zhang Zeqing,Liu Wei,Li Lin,Li Huan,Zhang Zhijun,Cheng Shuai,Rao Guanghui,Zhao Jingtai
In recent years, materials exhibiting multimodal luminescence properties from deep red to near-infrared (NIR) wavelengths have been a focal point of research, particularly in the exploration of applications within the realms of stress sensing and dynamic signature anti-counterfeiting. A pyroxene-type layered crystal structure compound, CaMgGe 2 O 6 : Mn 2+ , has been reported as a mechanoluminescent (ML) material. Upon incorporation into the host, Mn 2+ ions preferentially substitute for Mg 2+ ions, emitting deep red to near-infrared light (600–800 nm) within this six-coordinated [MgO 6 ] octahedral environment. The congruence of photoluminescence and ML spectra indicates that both types of luminescence originate from the same emissive center. The doping of Mn 2+ ions introduces impurity band, effectively reducing the optical band gap, as evidenced by ultraviolet diffuse reflectance measurements. Thermoluminescence results reveal three defect centers within the phosphor, whose concentrations decrease with Mn 2+ doping, correlating with a reduction in ML intensity. The ML mechanism of the phosphor is elucidated through the analysis of local piezoelectric properties within the crystal. Overall, this study may pave new pathways for the development of efficient near-infrared mechanoluminescent materials, showcasing potential applications within the biological domain.
研究领域:
材料科学
·
光学
·
生物医学工程
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DOI
高影响因子
Journal of Physical Chemistry C
·
2018
·
IF 4.484
Sihang Ji,Xi Yuan,Ji Li,Jie Hua,Yunjun Wang,Ruosheng Zeng,Haibo Li,Jialong Zhao
The Mn2+-doped CsPbCl3 nanocrystals (NCs) with a low Mn2+ doping concentration were synthesized using different reaction temperatures to control the NC size from 5.3 to 17.4 nm and then were studied by means of steady-state and time-resolved photoluminescence (PL) spectroscopy at various temperatures. The Mn2+ emissions with different quantum yields in the doped NCs in hexane exhibited nearly size-independent and single-exponential decay lifetimes of 1.8 ms at room temperature. The PL lifetimes in all Mn2+ in CsPbCl3-doped NCs had similar temperature dependence from 80 to 300 K, whereas they were size-dependent at elevated temperatures, reflecting thermal degradation of doped NCs. The degradation mechanisms of Mn2+ PL were attributed to the amount of surface defects as nonradiative recombination centers generated in size-unchanged and grown Mn2+:CsPbCl3 NCs. The study provides the detailed understanding of the thermal degradation mechanisms in doped perovskite NCs for optoelectronic applications.
研究领域:
纳米材料
·
光电子学
·
光物理
·
钙钛矿纳米晶
✓ 已验证
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2022
·
IF 4.171
Mingfeng Ma,Leipeng Li,Chongyang Cai,Yixiao Han,Yanmin Yang
Due to the unique outer electronic configuration, Mn 2+ can emit tunable luminescence over a wide wavelength range, which thus has a broad spectrum of applications in many fields such as lighting and anti-counterfeiting. Although the persistent luminescence of Mn 2+ in oxyacid salts has been widely studied, it is, however, rarely mentioned in fluorides, due to the fluorides’ wide band gap which cannot be effectively excited by ultraviolet light. Here, we mainly study the persistent luminescence of MgF 2 :Mn 2+ upon excitation of X-ray source. In addition, we also investigate the influence of Ca 2+ on the persistent luminescence of MgF 2 :Mn 2+ , and successfully achieve luminescence modulation from orange toward green in the CIE chromaticity coordinates. Finally, we show the potential applications of the persistent luminescence of (Mg,Ca)F 2 :Mn 2+ in terms of dynamic security.
研究领域:
材料科学
·
发光材料
·
光学性质
·
防伪技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）