Journal of Materials Chemistry C
·
2025
·
IF 5.1
Shan shan Zhao,He-He Dong,Weichang Li,Lei Zhang,Shikai Wang,Chun Yu,Hu Li
Upconversion emission materials have many advantages, such as narrowband sharp line emission, excellent photochemical stability, and long lifespan. In particular, under 980 nm invisible laser-beam irradiation, materials with visible light upconversion luminescence have vital application value in optical anti-counterfeiting and laser displays. In this study, a library of upconversion phosphors of CaLaAl3O7:RE3+/Yb3+ (RE=Tm, Ho) was produced through a high-temperature solid-state reaction method. The powders exhibited different color emissions under different excited wavelengths. Under 980 nm laser excitation, Tm3+/Yb3+ co-doped phosphors exhibited upconversion emission of 474 nm blue light, which was attributed to the 1G4→3H6 transition of Tm3+, and the fitting slope of the upconversion luminescence intensity vs. laser-pump power density was n450-500=2.83, which indicated the three-photon absorption upconversion process. Additionally, Ho3+/Yb3+ co-doped phosphors had the strongest red emission at 660 nm, originating from the 5F4/5S2→5I8 transition of Ho3+, which belongs to the two-photon absorption process. Subsequently, the changes in chromaticity coordinates of the prepared samples were analyzed under different light excitations, and different light color emissions were observed. The color purities of Ho3+/Yb3+ and Tm3+/Yb3+ co-doped samples were 99.9% and 65.4%, respectively. Finally, we verified the practical application value of the prepared powder in the fields of multi-color luminescence optical anti-counterfeiting and laser displays. The results show that the produced phosphors have vital application potential in information security protection, optical data storage, and 3D laser displays.
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
JOURNAL OF COORDINATION CHEMISTRY
·
2020
·
IF 1.41
Ting-Ting Zang,Jia-Peng Cao,Ze-Yu Du,Hua Mei,Yan Xu
Two new Schiff-base modified vanadium complexes, [VIVO(C7 H5O)2(N2C6H10)] (1) and [VVO2(C7H5O)(N2C6H12)] (2), were synthesized under hydrothermal conditions, in which salicylaldehyde and cyclohexanediamine were used directly to form Schiff-base ligands during the reactions. The structures of 1 and 2 were characterized by EA, FT-IR, UV-vis, SCXRD and PXRD, EPR spectroscopy and magnetic susceptibility measurement. Due to the good optical activity of Schiff-base ligands and the existence of conjugated benzene rings in 1 and 2, the delocalized electronic effects between Schiff-base ligands and vanadium can be improved. Therefore, the third-order non-linear optical (NLO) properties of these complexes were investigated. The results of the open aperture Z-scan tests show that the two-photon absorption (TPA) cross-sections (σ) of the complexes are 1033 and 1041GM, respectively, which indicated that they both have potential applications as NLO materials.
研究领域:
化学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Lei Wang,Ruipeng Hou,Tengfei Huang
The upconversion (UC) emission behavior occurs usually in rare-earth doped compounds but rarely in pure semiconductors. Herein, the UC emission behavior of WO 3 was investigated. The oxygen-vacancy-rich WO 3 nanosheets were rapidly synthesized by high-power laser irradiation. The red UC emission peaked at ∼1.75 eV is observed in the synthesized WO 3 nanosheets under continuous 980 nm or 1940 nm laser excitation. The UC emission stems from the abundant oxygen-deficient levels and belongs to a multiphoton absorption behavior. Meanwhile, the laser-power-dependent UC behavior could be attributed to the transformation of different oxygen defect states. On this basis, a variable output color phosphor based on Er-Yb co-doped WO 3 [WO 3 :(Er, Yb)] was developed. The WO 3 :(Er, Yb) phosphor can change the UC color from green to red with increasing the 980-nm laser power. Moreover, the upconversion behavior of WO 3 can be utilized to assist WS 2 photocatalysis. This work develops a pure semiconductor with an interesting UC emission and clarifies the UC mechanism.
研究领域:
材料科学
·
光学
·
光催化
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Guohong Tang,Yuqi He,Hongmei Liao,Shuangqi Zhang,Xiaofei Chu,Rongxia Si,Zhiyuan Jin,Yuhang Du,Chi Wang,Baojun Chen,Zhiyu He,Wei Huang
LiGaTe2 is a promising nonlinear optical crystal with a large figure of merit (d362/n3), but it is difficult to grow the LiGaTe2 single crystal due to its extreme instability. In this work, we used Ag to replace Li and successfully grew a Li0.5Ag0.5GaTe2 crystal by the modified Bridgman method for the first time. We found it has thermal stability below 200 °C in an atmospheric environment, and the thermal expansion coefficient is positive. This is different from LiGaTe2 and AgGaTe2 which have a negative thermal expansion coefficient along the c-axis. When the temperature exceeds 200 °C, Li0.5Ag0.5GaTe2 is easily decomposed and oxidized. Under closed vacuum conditions, the melting and solidifying points of Li0.5Ag0.5GaTe2 are measured to be 719 and 694 °C. XPS spectra show that the binding energies of Li, Ga, and Te are higher than LiGaTe2, and the surface is easily oxidized. The A1 vibration modes are found at 117.72 and 135.44 cm–1 by the Raman spectrum which is related to the Te and Ga–Te bond in [GaTe4]5– tetrahedra. Li0.5Ag0.5GaTe2 has a wide transmittance range from 0.94 to 20 μm, and there was two-photon absorption near 16 μm. The phonon spectrum and PDOS were simulated by the DFT calculation to study the phonon vibration modes in the lattice, which shows that the density of the Raman vibration is higher than those of AgGaTe2 and LiGaTe2. The SHG test results showed that the SHG response intensity of Li0.5Ag0.5GaTe2 is 1.5 times that of AgGaS2, which shows its excellent nonlinear optical properties for mid-IR applications.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
PubMed
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 81
·77849-77853
·
IF 3.289
Dan Liu,Na Zhang,Xinyu Zhang,Shuai Kong,Jianhua Yu,Zhichao Wu,Jieying Wu,Yupeng Tian,Hongping Zhou
A series of new zinc(II) complexes (Dyes 1–3) were obtained by self-assembly of the donor-bridge-donor (D–π–D) type ligand L with ZnX2 (X = Br, I, SCN). The single crystal of Dye 3 was obtained by slow evaporation of a mixture solution of methanol and dichloromethane. The molecular structure has been determined by X-ray crystallography. Hydrogen bonds (C–H⋯N, C–H⋯S) play significant roles in the final topological structures. Linear and nonlinear optical properties of the ligand and complexes were investigated in details. Experimental results revealed that effective two-photon absorption (TPA) cross sections of these complexes are larger than that of ligand L (18.7 GM) with the maximum values of 88.7 GM (Dye 1), 41.9 GM (Dye 2) and 46.5 GM (Dye 3) in DMF, respectively. The biological imaging result shows that L and Dyes 1–3 had excellent penetrability in living cells.
研究领域:
化学
·
材料科学
·
生物学
✓ 已验证
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2012
·
IF 2.098
Lin Ma,Yunhui Sun,Duxia Cao,Huihui Chen,Zhiqiang Liu,Qi Fang
Three aurone derivatives, Z -2-[(4- N , N -dimethylaminophenyl)methylene] benzofuran-3-one ( 1 ), Z -2-[( N -ethylcarbazol-3-yl)methylene]benzofuran-3-one ( 2 ) and Z -2-[(pyren-1-yl)methylene]benzofuran-3-one ( 3 ) have been synthesized by the cyclization of 2′-hydroxychalcones. Their crystal structure, single- and two-photon related absorption and fluorescence properties have been examined. Pumped by 860 nm laser pulses in femtosecond regime, the compounds exhibit strong yellow–green two-photon excited fluorescence at 539 nm ( 1 ), 505 nm ( 2 ) and 524 nm ( 3 ) in THF with two-photon absorption (TPA) cross-section being 1536GM ( 1 ), 608GM ( 2 ) and 236GM ( 3 ).
研究领域:
有机化学
·
材料科学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Qin Zhang,Yang Gao,Juguang Hu,Tingchao He
Chiral transition metal oxides (TMOs) have garnered significant attention in biological and optoelectronic applications due to their light–matter interaction mechanisms and tunable optical activities. However, the current understanding of their optical properties remains incomplete, limiting further development of related applications. To address this knowledge gap, this work has systematically investigated the photophysical characteristics of chiral TMOs, using chiral cobalt oxide nanoparticles (l/d-Cys-CoO1.35 NPs) as a model system. Transient absorption spectroscopy reveals complex charge-transfer behaviors in the visible wavelength region including ligand-to-metal charge transfer and d–d transitions. Using Z-scan measurements, two- and three-photon absorption cross sections of l/d-Cys-CoO1.35 NPs are determined. Furthermore, the reactive oxygen species assay confirms the synergistic capabilities of Type I (radical-mediated) and Type II (1O2-mediated) photodynamic therapy in these l/d-Cys-CoO1.35 NPs. This work not only advances the fundamental understanding of photophysical properties of chiral TMOs but also provides perspectives for their biomedical applications.
研究领域:
材料科学
·
纳米技术
·
光学
·
物理化学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Science
·
2023
·Vol. 10
·期 9
·2206070
·
IF 15.1
Wentao Wu,Xiaoying Shang,Zhijin Xu,Huang Ye,Yunpeng Yao,Xueyuan Chen,Maochun Hong,Junhua Luo,Lina Li
Organic–inorganic hybrid perovskites carry unique semiconducting properties and advanced flexible crystal structures. These characteristics of organic–inorganic hybrid perovskites create a promising candidacy for circularly polarized light (CPL) detection. However, CPL detections based on chiral perovskites are limited to UV and visible wavelengths. The natural quantum well structures of layered hybrid perovskites generate strong light–matter interactions. This makes it possible to achieve near-infrared (NIR) CPL detection via two-photon absorption in the sub-wavelength region. In this study, cooperative strategies of dimension increase and mixed spacer cations are used to obtain a pair of chiral multilayered perovskites (R- β -MPA)EA 2 Pb 2 Br 7 and (S- β -MPA)EA 2 Pb 2 Br 7 (MPA = methylphenethylammonium and EA = ethylammonium). The distinctive bi-cations interlayer and multilayered inorganic skeletons provide enhanced photoconduction. Moreover, superior photoconduction leads to the prominent NIR CPL response with a responsivity up to 8.1 × 10 −5 A W −1 . It is anticipated that this work can serve as a benchmark for the fabrication and optimization of efficient NIR CPL detection by simple chemical design.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
PubMed
高影响因子
Advanced Materials Technologies
·
2023
·Vol. 8
·期 8
·2201610
·
IF 6.8
Mengya Cui,Ting Huang,Zeyu Peng,Lingrong Xing,Zheng Zhou,Liang Guo,Jianli Wang,Jiejie Xu,Rongshi Xiao
Laser direct writing (LDW) is a promising approach for fabricating metallic micropatterns on transparent substrates for transparent electronic circuits that satisfy both electronic and optical criteria. However, high efficiency and precision patterning remain a challenge for both photochemical and photothermal LDW. Herein, a novel method is proposed with a femtosecond laser to achieve a highly-efficient photothermal process via single-photon absorption by photosensitive particles (SPA-FsLDW). The dispersive photosensitive particles act as numerous heating sources, enabling simultaneous multiple-location photothermal reactions and highly-efficient metallization due to heat-induced metal ion reduction. The new approach effectively exploits the excellent heat-input regulation with the ultrashort pulse of the femtosecond laser to achieve great temperature controllability and precision. It is shown that, with a deposition rate of ≈10 7 µm 3 s −1 and electrical resistivity of ≈10 −7 Ω m, SPA-FsLDW improves efficiency and electrical resistivity by at least one order of magnitude compared to previously reported FsLDW. A self-powered sensor is fabricated using SPA-FsLDW, demonstrating its practical applicability.
研究领域:
材料科学
·
光学工程
·
电子制造技术
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2024
·
IF 5.7
Maolan Peng,Xiaoming Mo,Liu Tan,Xiaoma Tao,Yifang Ouyang,Yulu Zhou,Yi Liang,Jialong Zhao
Lead-free copper halides have garnered significant attention due to their remarkable advancements in optoelectronic devices. While there have been numerous reports on linear optical characteristics and device implementations for lead-free copper halides, the lack of robust research on nonlinear optical properties impedes their potential applications in nonlinear photonic devices. In this work, lead-free copper halide CsCu2I3 and Cs3Cu2I5 single crystals were synthesized using an inverse temperature crystallization method, and their nonlinear upconversion luminescence properties arising from three-photon absorption were investigated under excitation of a near-infrared femtosecond laser. Surprisingly, in comparison with the single crystals, the CsCu2I3 and Cs3Cu2I5 thin films were both found to exhibit completely different nonlinear optical properties with a distinct two-photon absorption mechanism under the same femtosecond laser. The two-photon absorption coefficients were obtained as high as 2.63 × 107 and 1.76 × 107 cm MW−1 for the CsCu2I3 and Cs3Cu2I5 thin films, respectively. Moreover, the nonlinear refractive indices of the CsCu2I3 and Cs3Cu2I5 thin films were achieved as large as 1.25 × 104 and 0.33 × 104 cm2 MW−1, respectively. These values were at least several orders of magnitude higher than the reported two-photon absorption results of the perovskite thin films. These findings highlight the great potential of the perovskite-inspired CsCu2I3 and Cs3Cu2I5 thin films for advanced applications in nonlinear optoelectronic devices.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Dejia Chen,Yixuan Xu,Yating Wang,Xin Li,Dalong Yin,Lifeng Yan
Stable organic radicals, with unique electronic transitions from the ground state (D0) to the doublet excited state (D1), show promise as high-fluorescence quantum yield dyes. While organic small-molecule photosensitizers (PSs) have advanced for tumor photodynamic therapy (PDT), opportunities exist to enhance their performance and functionality. Herein, we synthesized Thiele’s fluorocarbon derivative diradicaloid TFC-I with nearly 100% PLQY and integrated it into amphiphilic polypeptide nanoparticles, P-TI, using a precursor-doping approach. P-TI demonstrated notable features including high photostability, aggregation-induced emission, bright near-infrared fluorescence, substantial quantum yield (37% PLQY), robust near-infrared two-photon absorption (∼400 GM cross section), and superior ROS generation compared to commercial PSs. In vitro and in vivo experiments confirmed that P-TI performed well in mitochondria-targeted PDT, two-photon fluorescence imaging, and biosafety. This work highlights the use of organic stable radicals with precursor-doping for efficient PDT and deep tumor tissue imaging.
研究领域:
生物医学工程
·
材料科学
·
肿瘤学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2024
·
IF 3.9
Dandan Li,Wenrong Zhao,Gang Li,Yan Xu,Liang Xu,Bo Tang
Graphical Two novel star-shaped fluorophores named PDI−S and PDI−Se are constructed by S/Se-fused perylene diimides (PDIs) connected with bicarbazole core. Particularly, PDI−S presents excellent two-photon absorption cross-action (δ TPA ) of 3775 GM excited with 800 nm light, which is the highest value based on PDIs motif in the NIR−I region (700–900 nm). Two-photon absorption (TPA) has attracted growing attention over recent years owing to the wide range of applications in organic nonlinear optical (NLO) materials. The quantitative sensitivity of a two-photon molecular entity is determined by its TPA cross-section (δ TPA ). Perylene diimides (PDIs) are excellent n-type organic semiconductor materials demonstrating distinguished thermal, optical, and chemical stability. Nonetheless, PDIs-based scaffolds exhibit poor δ TPA in the NIR−I region (700–900 nm) due to the lack of suitable molecular design. Here, two novel star-shaped PDIs fluorophores, namely PDI−S and PDI−Se, were constructed by four periphery S/Se-fused PDIs connected with bicarbazole core. PDI−S manifested excellent δ TPA of 3775 GM, which are among the highest values reported for PDIs excited in the NIR−I region.
研究领域:
有机化学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）