INORGANIC CHEMISTRY
·
2024
·
IF 4.3
Xunliang Jiang,Haoqing Ding,Fengxi Yang,Fusheng Luo,Zhixing Gan,Zhiping Fan,Fei Gao,Zhenzhi Cheng,Guangsheng Luo,Weiping Zhou
The lead-free halide perovskites possess nontoxicity and excellent chemical stability, whereas relatively weak luminescence intensity limits their potential in practical applications. Therefore, strengthening the luminescence intensity and expanding application fields are urgent tasks for the development of lead-free halide perovskites. In this paper, antimony-doped Cs2NaScCl6 crystals synthesized by a solvothermal method emit bright, deep blue photoluminescence at 447 nm. The photoluminescence (PL), photoluminescence excitation (PLE), and absorption spectra demonstrate that Sb3+ doping effectively activate the intrinsic “dark self-trapped exciton (STE),” leading to an impressive photoluminescence quantum yield (PLQY) value of 78.31% for 1% Sb3+ doping. Furthermore, the luminescence intensity remains above 92% compared with the fresh sample without secondary phases detected even after 90 days under environmental conditions. To expand the emission spectra, rare-earth Sm3+ is further incorporated into Cs2NaScCl6:1% Sb3+ crystals. The results show that Sb ions not only enhance intrinsic STE luminescence but also serve as sensitizers to boost the red-light emission of Sm3+, leading to a significant 500-fold increase in red emission intensity. Finally, the PLQY reaches a stunning 86.78%. These findings provide valuable insights in the design of Sb ion-doped lead-free double perovskites, broadening the application fields in various optoelectronic devices.
研究领域:
材料科学
·
光学
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DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2026
·
IF 7.8
Shuxin Li,Wenfei Shen,Hao Fu,Yao Wang,Jun Li,Zhonglin Du,Matt J. Kipper,Christopher D. Snow,Laurence A. Belfiore,Soo Wohn Lee,Jianguo Tang
The emergence of convenient blading technology has enabled the development of large-area polymer solar cells (PSCs). However, the smart, efficient enhancement and transparency adaption of bladed PM6:Y6 solar cells requires demonstration of key performance indicators. Herein, we report the enhanced efficiency and adapted transparency of PSCs by binary lanthanide (Eu3+/Sm3+)-induced diblock polymer aggregates (EIPAs/SIPAs) with inclusion of ZnO (ZnO:EIPAs:SIPAs). First, the EIPA- and SIPA-cocapsulated ZnO nanoclusters (ESPAs-Z) were employed as the electron-transport layer (ETL). Owing to their distinct excitation and emission spectra, EIPAs and SIPAs can synergistically boost solar light harvesting and energy conversion. Thus, bladed devices using a PM6:Y6 active layer, with EIPAs and SIPAs in the ETL, have achieved an enhanced power conversion efficiency (PCE) of 13.47% that is notably enhanced by the ratio of 11.4% from 12.03% of the single ZnO ETL. Simultaneously, this ESPAs-Z-in-ETL improves the compatibility between ITO and the active layer and optimizes the energy-level alignment at the interface. In PM6:Y6-based semitransparent polymer solar cells (ST-PSCs), doping EIPAs and SIPAs yielded an optimal PCE of 6.09% while maintaining a high AVT of 39.32%. This work demonstrates that incorporating Eu3+/Sm3+ nanoaggregates into PSCs is a critical advance for the scalable fabrication of ST-PSCs.
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DOI
PubMed
高影响因子
CRYSTAL GROWTH & DESIGN
·
2025
·
IF 3.4
Feiyan Xie,Junqiang Gu,Jie Zhang,Yintong Chen,Run Yin,Junhao Li
Due to the lack of red light, currently available commercial phosphor-converted white light-emitting diodes (pc-WLEDs) have a poor color rendering index. In order to improve the color rendering performance of pc-WLEDs, it is urgent to develop satisfactory bright red emission phosphors. Herein, we reported a bright red luminescent Na5Lu(WO4)4:Sm3+ phosphor. By studying the effect of Sm3+ doping concentration on luminescence performance, it was found that the concentration quenching effect was attributed to the dipole–dipole interaction. The quantum yield, color purity, and CIE coordinates of the optimal Sm3+ concentration activated Na5Lu(WO4)4:9%Sm3+ phosphor were 49.37%, 95.12%, and (0.653, 0.346), respectively. Furthermore, the phosphor had strong resistance to thermal quenching, and the luminous intensity at 425 K was only reduced by 10.20% compared with that at 300 K, while maintaining excellent color stability (Δε = 9.27 × 10–3). Finally, we used Na5Lu(WO4)4:9%Sm3+ phosphor as the red component, and additionally added commercial blue and green phosphors, combined with the 365 nm near-ultraviolet chip to produce a white LED device with a CRI of up to 90.5 and a CCT as low as 4581 K. These results indicated that Na5Lu(WO4)4:Sm3+ phosphors had broad potential applications in high color rendering index white LEDs excited by near-ultraviolet light.
研究领域:
材料科学
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光学工程
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DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2024
·Vol. 48
·期 27
·12146-12152
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IF 2.7
Henan Zhang,Qi Liu,Alena Novoselova,Valeri Smolenski,Kewei Jiang,Yongde Yan,Milin Zhang,Jun Wang
The reactions of oxygen and samarium ions in molten NaCl–2CsCl eutectic in the temperature range of 823–913 K have been investigated by potentiometric titration in an inert gas atmosphere. The activity of oxygen ions in the studied melts was monitored using a standard YZME (indicator) electrode based on Y2O3-stabilized ZrO2 with a solid–electrolyte membrane. The titration of Sm3+ by O2− ions demonstrated the formation of insoluble SmOCl compounds in the investigated region. The mechanism of formation of SmOCl and Sm2O3 was established by the analysis of potentiometric titration curves. Subsequently, the solubility of SmOCl and Sm2O3 in the melt was calculated using the material balance equation and solubility constant equation. Finally, the basic thermodynamic properties of SmOCl and Sm2O3 in molten NaCl–2CsCl eutectic were calculated, and the properties of samarium in the melt were summarized using the Pourbaix-type (E-pO2−) diagram to determine the kinds of stabilized samarium compounds. Furthermore, the optimal chlorination conditions can be obtained from the E-pO2− diagram of Sm.
研究领域:
化学
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材料科学
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 6
Weimin Jiang,Shengwei Guan,Chuangyu Wang,Mengxin Chen,Zengming Qin,You Li,Hongwei Ding,Feng Wang
A series of NaLu(MoO 4 ) 2 (NLMO): Sm 3+ phosphors and Sm 3+ , Eu 3+ co-doped NLMO phosphors were synthesized by high-temperature solid-state method. Their crystal structures and luminescent properties were systematically characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), fluorescence spectroscopy, fluorescence lifetime, and temperature-dependent emission spectroscopy. XRD results confirm that Sm 3+ and Eu 3+ are successfully doped through isovalent substitution of Lu 3+ sites without destroying the pure NLMO phase structure. Under 405 nm near-ultraviolet excitation, the optimal doping concentration of Sm 3+ is 0.04 mol, and the concentration quenching mechanism is dipole-dipole interaction. Efficient Sm 3+ →Eu 3+ energy transfer is observed in the co-doped system, which is further verified by the fluorescence lifetime measurement of Sm 3+ . The maximum energy transfer efficiency reaches 81%, with the dominant mechanism identified as dipole-dipole interaction. The NLMO:0.04Sm 3+ ,0.07Eu 3+ phosphor exhibits excellent thermal stability, retaining 81% of its emission intensity at 303 K when heated to 383 K, and the thermal quenching activation energy is as high as 0.331 eV. CIE chromaticity coordinates show that the emission color of the phosphor gradually shifts from orange-red to red with increasing Eu 3+ doping concentration, and the correlated color temperature is observed between 1753 K and 2339 K. These results demonstrate that the NLMO:Sm 3+ , Eu 3+ phosphor integrates high energy transfer efficiency, outstanding thermal stability, and precise color tunability, making it an ideal red component for near-ultraviolet excited white light-emitting diodes with significant practical application value.
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高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Yixuan Zhao,Lu Liu,Li Zhou,Ruiqi Yang,Changlin Li,Jiexin Chen,Ziyue Hu,Haoran Su,Bin Deng,Xiaohui Ji,Ruijin Yu
New Sm 3+ doped Cd 2 MgTeO 6 tellurate red-emitting phosphors with Na + ions as charge compensation were obtained using a high-temperature solid-state approach at 1000 °C. During this study, the prepared phosphors were subjected to phase purity, particle morphology , luminescence characteristics, thermal stability, and Commission Internationale de L′ Eclairage (CIE) chromaticity. The critical quenching concentration of Sm 3+ doped Cd 2 MgTeO 6 phosphor was 2 mol%. According to Dexter's theory and the calculated R c value (22.21 Å), the dipole-dipole interaction causes the phenomenon of concentration quenching. Particularly, the Cd 2 MgTeO 6 :2 mol%Sm 3+ , 2 mol%Na + phosphor exhibited an evident red-light emission (647 nm) at λ ex = 407 nm because of the 4 G 5/2 to 6 H 9/2 level transition of Sm 3+ . Its internal quantum efficiency (IQE) was 38.87%. It is worth noting that the Cd 2 MgTeO 6 :Sm 3+ , Na + phosphor exhibited abnormal thermal quenching (ATQ) characteristics, and the luminous intensity of the Cd 2 MgTeO 6 :2 mol%Sm 3+ , 2 mol%Na + increased by 7.20% at 480 K compared with the initial temperature. In addition, white LEDs and red LEDs were successfully manufactured with a 408 nm chip. The prepared red LED showed the emission spectrum similar to the absorption spectrum of Phytochrome P r , which is expected to be applied in plant growth. The w-LED had a CCT (correlated color temperature) of 4790 K, color rendering index of 91, and color coordinates of (0.348, 0.335). Therefore, the Cd 2 MgTeO 6 :Sm 3+ , Na + phosphor has demonstrated potential applications in w-LEDs and plant growth LEDs.
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高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Jiang Guo,Junlan Guo,Jing Gao,Jiexin Chen,Ya Yang,Yue Yang,Lingling Zheng,Yanyan Li,Lei Zhao,Bin Deng,Ruijin Yu
Novel orange-red-emitting LaNb 2 VO 9 (LNV): x Sm 3+ ( x = 0–35 mol%) phosphors were successfully synthesized through the traditional high-temperature solid-state reaction method. The crystal structure, SEM images, particle size distribution , XRD spectra, optimal concentration, zero-thermal-quenching behaviors, and luminescent stability of the samples were exhaustively studied. In particular, the phosphors presented broadband excitation that consisted of O 2− →V 5+ and O 2− →Sm 3+ charge transfer bands (CTB). Under 308 nm excitation, LNV:5 mol%Sm 3+ phosphor emitted orange-red light with high intensity at the wavelength of 598 nm due to the 4 G 5/2 → 6 H 7/2 transition of Sm 3+ ions. The sample with the optimal doping concentration of 5 mol% exhibited zero-thermal-quenching. Furthermore, a white light-emitting diode (WLED) with the Commission Internationale de L'Eclairage (CIE) coordinate of (0.347, 0.348) and the superior color rendering index (CRI, R a ) of 90 was smoothly fabricated. With the LNV: 5 mol%Sm 3+ phosphor, the level 1–3 structure of latent fingerprints (LFPs) and the detailed features of lip prints were clearly detected under ultraviolet irradiation. Ultimately, the phosphor effectively detected LFPs in various daily life circumstances. Consequently, the zero-thermal-quenching orange-red LNV:Sm 3+ phosphors have several promising applications in WLEDs and personal identification.
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DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2023
·Vol. 107
·期 5
·3012-3027
·
IF 3.9
Rong Tang,Yue Yang,Ya Yang,Xuan Ouyang,Junzhi Che,Shigao Chen,Xuemei Yao,Bin Deng,Ruijin Yu
A sequence of reddish-orange emitting NaSrBi (1− x ) TeO 6 : x Sm 3+ phosphors were successfully composited by a favorable solid-phase chemical process. The sintering temperature is optimized as 850°C. NaSrBiTeO 6 (NSBTO):Sm 3+ samples were assigned to the cubic double-perovskite structure, exhibiting the space group of Fm 3 ¯ $\bar{3}$ m (225). Photoluminescence emission spectra display the main peaks at 562, 598, 645, and 705 nm at 404 nm excitation. Among them, the most intense emission peak is at 645 nm. The concentration-quenching mechanism of Sm 3+ follows the interaction between electric dipoles and quadrupoles. The asymmetric ratio (I( 4 G 5/2 - 6 H 9/2 )/I( 4 G 5/2 - 6 H 5/2 ) of NSBTO:2 mol%Sm 3+ phosphor is extracted as 4.96. The optimum NSBTO:2 mol%Sm 3+ phosphor has excellent thermal stability with a remained emission intensity riches 93.61% (420 K). After testing with high-pressure water steam at various periods, the phosphor remains chemically stable for moisture resistance. For the NSBTO:2 mol%Sm 3+ phosphor, the satisfactory color purity and low correlated color temperature (CCT) are obtained with 99.9% and 1494 K, respectively. The electroluminescence spectra of the prepared red light emitting diode (LED) are in conformity with the phytochrome absorption spectra of chlorophyll a, chlorophyll b, P FR , and P R . The white light-emitting diode (w-LED) is also perfectly packaged, obtaining an efficient color rendering index ( R a ) of 92.12 and CCT of 5553 K. These exceeding optical properties certified that NaSrBi (1− x ) TeO 6 : x Sm 3+ demonstrates promising prospects and can be efficiently applied in horticultural LED applications.
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高影响因子
PHYSICA B-CONDENSED MATTER
·
2021
·
IF 2.436
Yang Yu,Sai Xu,Muhan Jiang,Ruixin Song,Jie Li,Yuefeng Gao,Xizhen Zhang,Xiangping Li,Hongquan Yu,Baojiu Chen
Upconversion core-shell nanoparticles with dual-function of temperature sensing and photothermal conversion are preferable in diagnose and treatment of cancer. Herein, NaYF 4 :Tm 3+ /Yb 3+ @NaYF 4 :Sm 3+ /Yb 3+ upconversion nanoparticles have been synthesized by a high-temperature thermal decomposition method. XRD and TEM are used to characterize the crystal structure and morphology of the samples. Temperature dependent upconversion spectra are measured under excitation of 980 nm within the scope of 303–498 K. The investigation on temperature sensing properties are on the basis of the luminescence intensity ratio of Tm 3+ . The designed core shell nanoparticles and bare core nanoparticles both have good temperature sensing performances, and the sensing properties of both are similar. Furthermore, the photothermal conversion performances are investigated ground on the power dependent temperature measurement, ethanol evaporation experiment and visual infrared thermal images. It is found that the photothermal conversion ability of the core-shell UCNPs is greatly improved by coating of the NaYF 4 : Sm 3+ /Yb 3+ outer shell.
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高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Kechen Zhang,Haojing Xu,Yuhe Shao,Zaisheng Wen,Ting Wang,Mingyue Chen,Zhen Song,Quanlin Liu
Achieving excitation-free, long-range target surveillance under complete darkness remains a critical challenge for night-vision technology. Here, a breakthrough is reported in near-infrared (NIR) persistent luminescence (PersL) materials designed specifically for this frontier. Through strategic bandgap engineering via Sm 3 ⁺ co-doping and In 3 ⁺ solid-solution incorporation in the novel Cr 3 ⁺-doped Mg 3 Ga 1.9 In 0.1 SnO 8 spinel phosphor, the afterglow intensity and duration are dramatically enhanced. The optimized material exhibits an ultra-long NIR PersL exceeding 168 h. Crucially, PDMS films embedded with this phosphor enabled real-time, persistent target detection at an unprecedented distance of 47.5 m in complete darkness, entirely without any external excitation source. This record-setting long-range performance demonstrates the material's potential as an enabling technology for passive, long-range nighttime surveillance systems. Comprehensive spectroscopic studies elucidate the underlying PersL mechanism. This work establishes a new pathway for designing ultra-long NIR PersL materials and paves the way for advanced applications in remote night-vision technologies.
研究领域:
材料科学
·
光学材料
·
光子学
·
夜视技术
·
远程传感
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2024
·
IF 11.2
Zhuo Li,Nan Yang,Shiqin Ding,Ziwang Zhang,Weijie Huang,Zhibin Ye,Meihua Zhao,Jianxin Shi
Inorganic lead-free double perovskites have the advantages of low toxicity, broadband emission, and good stability, which make them promising luminescent materials for lighting applications. However, due to the limited regulation of their self-trapped exciton emission, it is still greatly challenging to achieve white light emitting from a single double perovskite host. Herein, efficient and tunable white light is realized in Cs 2 NaInCl 6 : Sb 3+ , Tb 3+ , Sm 3+ double perovskite by controlling the ratios of the doped three ions with blue, green, and red emissions, respectively. The steady-state and transient fluorescence spectra of singly- and doubly-doped double perovskites reveal the existence of multiple energy transfer channels in the triply-doped phosphors, including from Sb 3+ to Tb 3+ , Sb 3+ to Sm 3+ , and Tb 3+ to Sm 3+ . Benefiting from these channels, the color coordinates of the triply-doped phosphors can cross the whole white light area of the CIE chromaticity diagram by adjusting the ratios of the three dopants , and the maximum internal quantum yield of the white light phosphors is 66.61 %. The white emission phosphors show the characteristic of being independent of excitation wavelength within 310–360 nm. Furthermore, the emission intensity at 430 K of the white light phosphor Cs 2 NaInCl 6 : 0.01Sb 3+ , 0.65Tb 3+ , 0.20Sm 3+ remains 50 % of that at room temperature. A WLED device fabricated with the phosphor and a 365 nm LED chip exhibits a high color rendering index of 90.9, correlated color temperature of 5469 K, and CIE coordinates of (0.333 and 0.328). The results indicate that the as-prepared double perovskite materials are promising candidates in the solid-state lighting field.
研究领域:
材料科学
·
光学
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DOI
高影响因子
ACS Applied Optical Materials
·
2024
·
IF 0
Yuhang Zheng,Shoujun Ding,Yong Zou,Xubing Tang,Wenpeng Liu
Sc(NbO4)x(TaO4)1–x is composed of ScNbO4 and ScTaO4 matrices, containing [NbO4]3– and [TaO4]3– self-activating luminescent groups, and is a series of potential high-performance luminescent matrixes. In this work, trivalent samarium (Sm3+)-doped Sc(NbO4)x(TaO4)1–x (SNTO) phosphors have been synthesized through a traditional solid-state reaction method. The quenching concentration of Sm3+ in the SNTO matrix was 2 atom %, and the quenching mechanism was analyzed. Especially, the effects of [NbO4]3–/[TaO4]3– component ratios on luminescent properties and thermal stability were studied. The temperature-dependent fluorescence spectra and decay curves of Sm:SNTO phosphors, spanning from 300 to 510 K, have unveiled their luminescent thermal stability. The activation energy Ea representing luminescent thermal stability was found to be sensitive to the [NbO4]3–/[TaO4]3– component ratios, and the maximum Ea value was 0.272 eV. The findings suggest that the luminescent thermal stability of Sm3+-doped Sc(NbO4)x(TaO4)1–x orange-reddish phosphors can be regulated by the host component. Thus, this study can provide a reference for achieving high luminescent thermal stability phosphors through cosubstitution component regulation.
研究领域:
材料科学
·
无机化学
·
光学
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DOI
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