Journal of Materials Chemistry C
·
2024
·Vol. 13
·期 1
·242-249
·
IF 5.7
Lidong Wang,Xueting Fu,Peng Du,Hai Jiang,Laihui Luo
The versatility of emission modes and colors in flexible films is essential for broadening their potential applications. This study presents the development of a multi-mode luminescent flexible film by integrating ZnS:Cu and LiNbO3:Pr3+ powders into a polydimethylsiloxane (PDMS) matrix. The ZnS:Cu and LiNbO3:Pr3+ powders are uniformly distributed in the PDMS matrix. The effect of the LiNbO3:Pr3+ content on the photoluminescence (PL), electroluminescence (EL), mechanoluminescence (ML), thermoluminescence (TL), and photostimulated luminescence (PSL) properties of the films has been investigated. The PL colors of the LiNbO3:Pr3+/ZnS:Cu/PDMS flexible films due to the distinct intrinsic emissions of ZnS:Cu and LiNbO3:Pr3+ can be changed by altering the excitation wavelength. An appropriate content of the LiNbO3:Pr3+ powder introduces PSL into the flexible films, while the films demonstrate excellent EL and ML performance, along with multicolored TL emissions, including red and green. This research offers a novel approach to enhancing flexible electronic displays, EL devices, and optical anti-counterfeiting technologies.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
LUMINESCENCE
·
2023
·Vol. 38
·期 8
·1465-1476
·
IF 2.9
Sheng Wu,Puxian Xiong,Kexin Qin,Yao Xiao,Binli Xiao,Kang Chen,Dongliang Jiang,Yinzhen Wang
Mechanoluminescence (ML) materials have found potential applications in information storage, anti-counterfeiting, and stress sensing. Conventional stress sensing based on absolute ML intensity is prone to significant mistakes owing to the unpredictability of measurement surroundings. However, implementing a ratiometric ML sensing technique may considerably ameliorate this issue. In this study, a single activator-doped gallate material (LiGa 5 O 8 :Pr 3+ ) is proposed to determine the relationship between the ML intensity and the change in local positional symmetry that occurs when the material is subjected to stress. The sensing reliability of the ML intensity ratio under different factors (Force; Content; Thickness and Materials) is systematically analyzed, where the factor that has the greatest effect on the proportional ML is the concentration, with the ML intensity asymmetry ratio decreasing from 1.868 to 1.300 varying concentration at constant stress. The colour-resolved visualization of stress sensing is further realized, which opens a new path for a ratiometric ML-based strategy to improve the reliability of stress sensing.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
Optical Materials Express
·
2018
·Vol. 8
·期 6
·1425-1434
·
IF 2.566
Cong Pan,Jun-Cheng Zhang,Min Zhang,Xu Yan,Hong-Di Zhang,Yun-Ze Long,Xin-Yuan Sun,Hai-Tao Jiang
Isomorphic materials tend to exhibit differentiated performance due to the small differences between the constituent atoms and the crystal structures. Inspired by the isomorphic strategy, herein we developed a novel trap-controlled mechanoluminescent (TC-ML) material, Pr3+-activated Sr2Nb2O7, that shows mechanoluminescence (ML) under the mechanical actions of compression and friction. Compared to the isomorphic Ca2Nb2O7:Pr3+ which requires a long-time delay to achieve high-contrast ML due to the strong long-lasting afterglow, Sr2Nb2O7:Pr3+ enables the obtaining of high-contrast ML in a short-time delay because of the weak short-lasting afterglow, which greatly simplifies the imaging process to facilitate the further application of ML. The investigations of structural and optical characteristics between Sr2Nb2O7:Pr3+ and Ca2Nb2O7:Pr3+ reveal that the unique ML of Sr2Nb2O7:Pr3+ should result from its lower trap concentration and shallower trap depth relative to Ca2Nb2O7:Pr3+. Our results are expected to deepen our understanding on the behavioral diversity of isomorphic phosphors and thereby broaden the horizon of designing and regulating TC-ML materials.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
Advanced Optical Materials
·
2023
·Vol. 11
·期 22
·2300911
·
IF 9
Binli Xiao,Puxian Xiong,Sheng Wu,Dongliang Jiang,Kang Chen,Yao Xiao,Peishan Shao,Yinzhen Wang
Mechanical luminescence (ML) is the conversion of mechanical energy into light energy when a material is subjected to a force. It is challenging to develop ML materials with tunable luminescent properties by single ion doping, which have broad application prospects in the fields of stress sensing and dynamic signature anticounterfeiting. In this study, a Pr 3+ doped Sr 2 Ga 2 GeO 7 tunable ML material is reported. Due to the traps resulting from unequal substitution of Pr 3+ –Sr 2+ in [SrO 6 ] heptahedra, the deep/shallow traps redistribution occurs towards a multicolor ML from red to green. In addition, even after continuous friction sliding force (15 N), the ML intensities can be recovered after ultraviolet pre-irradiation, indicating that Sr 2 Ga 2 GeO 7 : Pr 3+ has excellent ML emission stability. Based on thermoluminescence analysis, potential PersL and ML mechanisms are further elaborated by a lattice engineering (trap regulation) strategy. In all, the development of single-ion doped multicolor ML materials may have crucial research value and show a variety of potential applications in the fields of anticounterfeiting and information encryption.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Xuelian He,Hang Zhang,Feiyan Xie,Chaochao Tao,Hualan Xu,Shengliang Zhong
High luminescence intensity and long persistent duration is desired for practical application of long persistent materials. But it still remains challenging due to insufficient phosphors to meet the commercial request and a general lack of understanding of luminescence mechanism. In this work, green persistent luminescent phosphor Zn 2 SiO 4 :Mn 2+ ,Pr 3+ was first synthesized by traditional solid-state reaction method with self-made SiO 2 submicrospheres as silicon source. The morphology, crystal structure, photoluminescence and the long afterglow performance have been investigated systematically. Interestingly, the longest persistent luminescence is observed for 0.025 Mn 2+ , 0.001 Pr 3+ co-doped Zn 2 SiO 4 with a persistent time of ∼2640 s at (0.32 mcd/m 2 ), which is 20 times longer than those of Zn 2 SiO 4 host or single Mn 2+ doped Zn 2 SiO 4 phosphors. The possible persistent mechanism has been discussed. The finding will be beneficial for developing persistent phosphors with superior functionalities.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
Journal of Superconductivity and Novel Magnetism
·
2022
·Vol. 35
·期 9
·2473-2484
·
IF 1.675
Li Pengwei,Li Jie,Zhang Wenhao,Wang Yonglun,Yao Kai
Pr-doped M-type barium ferrite with a composition of Ba 1− x Pr x Fe 12 O 19 (0.00 < x < 0.25) was prepared via solid-state sintering combined with high-energy ball milling. The structures, spectra, morphologies, and magnetic properties of Pr 3+ -substituted Ba hexaferrites were analyzed herein. Under high-energy ball milling, the material produces crystal vacancy defects for elemental doping. The X-ray diffraction results showed that the hexagonal crystal structure was affected when the Pr content ( x ) was > 0.20. The GSAS refinement results show that the synthesized samples were good. The scanning electron microscopy results and Fourier transform infrared (FT-IR) spectra of the tetrahedral and octahedral sites (FT-IR result of the Fe–O bond = 601 and 448 cm −1 peaks, respectively) of the prepared material proved the formation of a hexagonal crystal structure. The magnetic properties of the samples were measured using a vibrating sample magnetometer at room temperature, and the obtained results demonstrated that the coercivity increased with an increase in the doping amount (from 3815.03 at x = 0 to 4600.56 kOe at x = 0.25). At the same time, the saturation magnetization maintained its high value (> 72.568 emu/g), which is beneficial for preparing permanent magnets.
研究领域:
材料科学
·
磁学
✓ 已验证
产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2022
·
IF 3.754
Xinning Xu,Zongliang Xiao,Yuhang Wang,Yinuo Yan,Junwei Shen,Yawen Nie,Weixiong You,Di Wu,Lei Han,Fengqin Lai
Ultraviolet-C (UVC) light shows important application prospects in disinfection, disease phototherapy, cancer photodynamic therapy, etc. Here, a novel UVC upconversion phosphor δ -Y 2 Si 2 O 7 :Pr 3+ with excellent optical properties was successfully prepared by the high-temperature solid-state reaction method and the sol-gel method. The XRD results clarified the law of phase transition from the β -/ γ -Y 2 Si 2 O 7 to the δ -Y 2 Si 2 O 7 phase. The diffuse reflection spectra of phosphors prepared by two different methods exhibited two obvious absorption bands related to the 3 H 4 → 3 P 2 and 3 H 4 → 1 D 2 transitions of Pr 3+ ions. And the values of the band gap were estimated by diffuse reflection spectra, which are in good agreement with the value calculated by DFT . Under the excitation of 460 nm laser, two emission peaks corresponding to the 4 f 5 d → 3 H 4 and 4 f 5 d → 3 H 5 transitions of Pr 3+ ions were discovered at ∼247 nm and ∼258 nm in the range of 230–280 nm. Additionally, the phosphor prepared by the sol-gel method has a higher emission intensity than the phosphor prepared by the high-temperature solid-state reaction method. With the help of temperature-dependent emission spectra , the phosphor prepared by two methods demonstrated outstanding thermal stability up to 150 °C, and the luminescent intensity at 150 °C remained 86.8% and 87.9% of that at ambient temperature, respectively. The results mentioned above suggest that the Y 2 Si 2 O 7 :Pr 3+ phosphor may have potential applications in the field of disinfection.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2024
·Vol. 130
·期 8
·1-13
·
IF 2.5
Xie Zhuojia,Xu Changji,Jiang Xinyu,Zhang Weijian,Feng Min,Zhong Shenglin,Zou Zhengguang
With the growing attention to perovskite materials in the field of magnetic refrigeration. In this work, La 0.8−x Pr x Sr 0.2 MnO 3 (x = 0.05, 0.10, 0.15) (LPSMO) samples were synthesized through the sol–gel method. The effects of Pr 3 ⁺ doping on the structure, morphology, and magnetization of LPSMO were investigated. The XRD analysis revealed that the LPSMO samples have a rhombohedral structure within the R-3c space group. As the amount of Pr 3 ⁺ doping increased, the cell volume decreased. The magnetic properties of LPSMO exhibited a transition from ferromagnetic (FM) to paramagnetic (PM) near the Curie temperature (Tc), with Tc decreasing as the Pr 3 ⁺ doping level increased. The second-order magnetic phase transition of LPSMO near Tc was confirmed by employing the MPMS. The maximum magnetic entropy change ( \(-\Delta {S}_{M}^{max}\) ) of LPSMO is 4.92 J/(kg·K) (x = 0.05), 5.13 J/(kg·K) (x = 0.10) and 5.04 J/(kg·K) (x = 0.15) when the external magnetic field (H) = 5 T, separately. Meanwhile, the relative cooling power ( RCP ) of LPSMO are 283.88, 276.71, and 289.60 J·kg −1 , respectively. The experiments indicate that LPSMO has promising application prospects.
研究领域:
材料科学
·
磁制冷技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMISTRY OF MATERIALS
·
2016
·
IF 9.407
Jun-Cheng Zhang,Yun-Ze Long,Xu Yan,Xusheng Wang,Feng Wang
Recoverable mechanoluminescence (ML), characterized by nondestructive and repetitive luminescence in response to a mechanical stress, has shown considerable promise in a variety of practical applications including lighting and display, as well as stress sensing and imaging. However, the progress in utilizing ML processes has been constrained by the difficulties in developing new ML materials and in ascertaining ML mechanism. In this paper, we report a new strategy to constructing recoverable ML materials by doping piezoelectric hosts with luminescent lanthanide ions, which simultaneously create luminescent centers and carrier traps in the host lattice. The viability of the strategy has been confirmed by assessing a series of Pr3+ activated calcium niobates composed of mCaO·Nb2O5 (m = 1, 2, and 3). Furthermore, systematical characterizations of the series of calcium niobates also reveal an unusual host dependent ML phenomenon. Our results are expected to expand the scope of designing ML materials and to deepen our understanding of ML mechanism, thereby promoting further utilization of recoverable ML.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
ACS Applied Nano Materials
·
2023
·
IF 5.9
Feng Gao,Qing Pang,Dangli Gao,Chaoyang Jia,Hong Xin,Yong Pan,Yuhua Wang,Sining Yun
Photostimulable luminescence (PSL) nanophosphors, which exhibit superior features including controllable energy storage and efficient photon release upon light stimulation, are desirable for optical signal storage. However, trap tuning of the storage phosphor remains a great challenge. Herein, the PSL of Zn2GeO4:Mn2+ nanophosphors is enhanced via creating deep traps through nonequivalent Pr3+ doping. The possible enhanced mechanisms are analyzed combined with doping models using the first-principles theory. A mechanism is proposed based on changing the coordination environment of Mn2+, creating deep traps and tuning the band gap structure, and thus providing the chance for electrons’ photoionization and PSL generation. As a result, the prepared nanophosphors demonstrate the superior functionalities for optical signal storage. This work not only offers an insight into defect engineering through doping strategies for developing PSL materials but also supplies a good candidate for optical information storage.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
OPTICS EXPRESS
·
2022
·Vol. 30
·期 18
·31889-31897
·
IF 3.833
Leipeng Li,Leipeng Li,Leipeng Li,Zhuqin Wu,Zhuqin Wu,Pinshu Lv,Chunzheng Wang,Xiumei Han,Yanmin Yang,Yanmin Yang
Luminescence-based thermometry, especially the ratiometric temperature sensing technology, has attracted considerable attention recently due to its characteristics such as non-contact operating mode and strong capacity of resisting disturbance. Differing from the conventional strategy that usually needs continuous excitation, here an optical thermometry, which we have named the persistent luminescence intensity ratio (PLIR) thermometry, is proposed. The PLIR thermometry relies on the optical material SrF2:Pr3+ that could emit luminescence for several hours and even longer after being charged by X-ray. It has been demonstrated that the PLIR is sensitive to the variation of temperature and complies with the Boltzmann distribution. More importantly, the reliability of the proposed PLIR thermometry is verified. Our work may inspire others to develop more persistent luminescence thermometry.
研究领域:
材料科学
·
光学
·
温度测量
✓ 已验证
DOI
高影响因子
OPTICAL MATERIALS
·
2024
·
IF 3.8
Shanshan Zhao,Saima Kanwal,Weiwen Su,Hui Lin,Zhaoxia Han,Songlin Zhuang,Dechao Yu,Dawei Zhang
On basis of fluorescence intensity ratio (FIR) over certain narrow coupled levels of rare-earth ions, up-conversion of RE-doped materials perform excellent temperature-sensing abilities for thermometry applications. A series of Pr 3+ /Gd 3+ co-doped Ca 2 Al 2 SiO 7 phosphors (Ca 2 Al 2 SiO 7 :Pr 3+ /Gd 3+ ) were prepared by a conventional high-temperature solid-state reaction. Under excitation of blue ∼445 nm, the Ca 2 Al 2 SiO 7 :Pr 3+ /Gd 3+ phosphor yields intense photoluminescence (PL) bands around 489, 528, 537, 580, 604, 613, and 646 nm due to electronic transition of 3 P 0 → 3 H 4 , 3 P 0 → 3 H 5 , 3 P 1 → 3 H 5 , 3 P 1 → 3 H 6 , 1 D 2 → 3 H 4 , 3 P 0 → 3 H 6 , and 3 P 0 → 3 F 2 of Pr 3+ , respectively. Their relative intensities are sensitively determined by Pr 3+ contents, which, from 0.1 % to 5 %, tune the emission color from pink to warm white under excitation of 445 nm. It is of great interest that intense irradiation using a blue ∼445 laser does make efficient ultraviolet B (UVB) up-conversion at about 297, 306, and 313 nm, just stemming from the 6 P 3/2 → 8 S 7/2 , 6 P 5/2 → 8 S 7/2 , and 6 P 7/2 → 8 S 7/2 of Gd 3+ , respectively. A typical two-photon absorption process was proved to account for the UVB up-conversion, i.e. successive absorption of two blue ∼445 nm photons populating Pr 3+ 4f5d excited state, which further efficiently transfer its energy to the 6 I J / 6 P J states of Gd 3+ neighbor for UVB emission. Moreover, the thermally coupled levels (TCLs) of Gd 3+ : 6 P 3/2 - 6 P 7/2 , and Gd 3+ : 6 P 5/2 - 6 P 7/2 were thoroughly investigated for temperature sensing in 298–598 K. Maximum relative sensitivity of the 6 P 3/2 - 6 P 7/2 TCLs, i.e. S r (I 306 /I 313 ), is proved to be 0.96 % K −1 at 298 K, and that of the 6 P 5/2 - 6 P 7/2 TCLs, i.e. S r (I 297 /I 313 ), is 1 % K −1 at 373 K. The relevant thermal stabilities of the Ca 2 Al 2 SiO 7 :Pr 3+ /Gd 3+ thermometric candidate was well validated with 10 cycles of heating and cooling processes in 298–598 K. Such continuous explorations of Pr 3+ /Gd 3+ co-doping system will significantly promote the development of robust UVB up-converting phosphors as well as their practical applications in the field of high-resolution optical thermometry.
研究领域:
材料科学
·
光学
·
热测量技术
✓ 已验证
产品关联
DOI
高影响因子
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