Luminescent lanthanide complexes have been widely investigated as light emitting materials in bio-imaging and sensing, solid state lighting and display, anti-fake tags and light conversion films, due to their characte...Luminescent lanthanide complexes have been widely investigated as light emitting materials in bio-imaging and sensing, solid state lighting and display, anti-fake tags and light conversion films, due to their characterized photophysical properties including large Stokes shift, long lifetime, and sharp emission spectrum, arising from the sensitized f-f transitions. In this review, we summarize the most recent advances in luminescent lanthanide complexes and their applications from 2015 to August 2017 concerning of general concepts to potential applications. We first introduce the basic concept of sensitized luminescence of lanthanide complexes and the strategies used for highly luminescent complexes. Then recent varieties of luminescent lanthanide complexes and their hybrid materials are presented. Finally, applications are discussed in detail.展开更多
Facile and efficient method for constructing carbon dots(CDs)with narrow full width at half maximum(FWHM)is a major challenge in the field,and researches on regulating the FWHM of CDs are also rare and scarce.In this ...Facile and efficient method for constructing carbon dots(CDs)with narrow full width at half maximum(FWHM)is a major challenge in the field,and researches on regulating the FWHM of CDs are also rare and scarce.In this work,we delved into the synthesis of CDs with narrow fluorescence emission FWHM(NFEF-CDs)in the m-phenylenediamine(m-PD)/ethanol system,utilizing solid superacid resin as cata-lyst with solvothermal method.The resulting NFEF-CDs exhibit a photoluminescent(PL)emission peak at 521 nm with a narrow FWHM of 41 nm,an absolute PL quantum yield(QY)of 80%,and display excitation-independent PL behavior.Through comprehensive characterization,we identified the protonation of edge amino on NFEF-CDs as the key factor in achieving the narrow FWHM.Subsequently,we validated the broad applicability of solid superacid resins as catalysts for synthesizing CDs with narrow FWHM in the m-PD/ethanol system.Finally,we utilized a self-leveling method to prepare NFEF-CDs film on the surface of poly(methyl methacrylate)(PMMA)substrate and investigated the solid-state fluorescence properties of NFEF-CDs as well as their performance as luminescence solar concentrator(LSC)for photovoltaic conver-sion.The results revealed that the as-prepared LSC exhibit an internal quantum efficiency(η_(int))of 42.39%and an optical efficiency(η_(opt))of 0.68%.These findings demonstrate the promising prospects of NFEF-CDs in the field of LSCs and provide a theoretical basis for their application in photovoltaic conversion.展开更多
The polyethylene oxide(PEO)based solid-state batteries are considered as promising candidates for the next-generation Li metal batteries with high energy density and safety.However,the low Li-ion conductivity and high...The polyethylene oxide(PEO)based solid-state batteries are considered as promising candidates for the next-generation Li metal batteries with high energy density and safety.However,the low Li-ion conductivity and high-voltage endurability hinder the further applications of PEO-based electrolytes.To overcome these issues,herein two-dimensional(2D)CeF_(3)nanoplates with maximally exposed[001]crystal faces are introduced into the PEO matrix to expand the electrochemical window and improve Liion conduction and transport.The optimized crystal shape and crystal face anisotropy of CeF_(3)nanoplate filler reduce the crystallinity of composite solid polymer electrolyte(CSPE)via its Lewis acid-base interaction with ether oxygen of PEO.The Liaffinity[100]and Li-repellent[001]crystal faces of CeF_(3)nanoplates synergistically realize the dissociation of lithium bis(trifluoromethanesulfonyl)imide(LiTFSI),fast Li-adsorption/desorption,and Li+migration.The optimized CSPE-0.1CeF_(3)membrane enables the achievement of Li metal batteries with high endurability and stability,from the kinetically favorable Li/Li symmetric cells with long-term cycling over 8000 h.The highly reversible Li/LiFePO_(4) cells exhibit a capacity retention of 109.2 mAh·g^(−1)after 1000 cycles at 1 C,corresponding to a low capacity fading rate of 0.026%per cycle.The conversion-type allsolid-state Li/CSPE-0.1CeF_(3)/FeF_(3)cells show a high reversible capacity of 201.9 mAh·g^(−1)after long-term 600 cycles and of 231.1 mAh·g^(−1)at an ultra-high rate of 5 C.展开更多
A high-repetition-rate eye-safe optical parametric oscillator （OPO）, using a non-critically phase-matched KTP crystal intracavity pumped by a passively Q-switched Nd：GdVO4/Cr^4＋ ：YAG laser, is experimentally demo...A high-repetition-rate eye-safe optical parametric oscillator （OPO）, using a non-critically phase-matched KTP crystal intracavity pumped by a passively Q-switched Nd：GdVO4/Cr^4＋ ：YAG laser, is experimentally demonstrated. The conversion efficiency for the average power is 7% from pump diode input to OPO signal output and the slope efficiency is up to 10.3%. With an incident pump power of 7,3 W, the compact intracavity OPO （IOPO） cavity, operating at 15 kHz, produces an average power of 0.57 W at 1570 nm with a pulse width as short as 6 ns. The peak power at 1570 nm is higher than 6.3 kW.展开更多
We report on frequency doubling of high-energy,high repetition rate ns pulses from a cryogenically gas cooled multi-slab ytterbium-doped yttrium aluminum garnet laser system,Bivoj/DiPOLE,using a type-I phase matched l...We report on frequency doubling of high-energy,high repetition rate ns pulses from a cryogenically gas cooled multi-slab ytterbium-doped yttrium aluminum garnet laser system,Bivoj/DiPOLE,using a type-I phase matched lithium triborate crystal.We achieved conversion to 515 nm with energy of 95 J at repetition rate of 10 Hz and conversion efficiency of 79%.High conversion efficiency was achieved due to successful depolarization compensation of the fundamental input beam.展开更多
A low-threshold middle-infrared （mid-IR） MgO：PPLN optical parametric generation （OPG） pumped by a laser diode （LD） end-pumped Z-type Nd：YLF laser at 1047 nm is realized with high reflectivity（HR） mirror for ...A low-threshold middle-infrared （mid-IR） MgO：PPLN optical parametric generation （OPG） pumped by a laser diode （LD） end-pumped Z-type Nd：YLF laser at 1047 nm is realized with high reflectivity（HR） mirror for signal. At repetition rate of 10 kHz, the OPG threshold of 50 μJ has been achieved with HR mirror for signal. Compared with the threshold without mirror, the threshold decreases by 17%. Using HR mirror for pump at output side of crystal, the threshold of 40 μJ is achieved. The 2.7 - 4.1 μm continuous tunable output is produced with seven grating periods from 28.5 to 31.5 μm and temperatures from 30 to 200 ℃. When the incident average pump power is 3 W, the OPG idler output power is 0.46 W at 3.26 μm, which corresponds to optical-to-optical conversion efficiency up to 15.3%.展开更多
基金supported by the National Key Basic Research Program of China(Grant No.2014CB643802)the National Natural Science Foundation of China(Grant Nos.21371012,21321001,and 21621061)
文摘Luminescent lanthanide complexes have been widely investigated as light emitting materials in bio-imaging and sensing, solid state lighting and display, anti-fake tags and light conversion films, due to their characterized photophysical properties including large Stokes shift, long lifetime, and sharp emission spectrum, arising from the sensitized f-f transitions. In this review, we summarize the most recent advances in luminescent lanthanide complexes and their applications from 2015 to August 2017 concerning of general concepts to potential applications. We first introduce the basic concept of sensitized luminescence of lanthanide complexes and the strategies used for highly luminescent complexes. Then recent varieties of luminescent lanthanide complexes and their hybrid materials are presented. Finally, applications are discussed in detail.
基金supported by the National Natural Science Foundation of China(No.22308161)the Jiangsu Funding Program for Excellent Postdoctoral Talent(No.2022ZB369),Priority Academic Program Development of Jiangsu Higher Education Institutions(PAPD).
文摘Facile and efficient method for constructing carbon dots(CDs)with narrow full width at half maximum(FWHM)is a major challenge in the field,and researches on regulating the FWHM of CDs are also rare and scarce.In this work,we delved into the synthesis of CDs with narrow fluorescence emission FWHM(NFEF-CDs)in the m-phenylenediamine(m-PD)/ethanol system,utilizing solid superacid resin as cata-lyst with solvothermal method.The resulting NFEF-CDs exhibit a photoluminescent(PL)emission peak at 521 nm with a narrow FWHM of 41 nm,an absolute PL quantum yield(QY)of 80%,and display excitation-independent PL behavior.Through comprehensive characterization,we identified the protonation of edge amino on NFEF-CDs as the key factor in achieving the narrow FWHM.Subsequently,we validated the broad applicability of solid superacid resins as catalysts for synthesizing CDs with narrow FWHM in the m-PD/ethanol system.Finally,we utilized a self-leveling method to prepare NFEF-CDs film on the surface of poly(methyl methacrylate)(PMMA)substrate and investigated the solid-state fluorescence properties of NFEF-CDs as well as their performance as luminescence solar concentrator(LSC)for photovoltaic conver-sion.The results revealed that the as-prepared LSC exhibit an internal quantum efficiency(η_(int))of 42.39%and an optical efficiency(η_(opt))of 0.68%.These findings demonstrate the promising prospects of NFEF-CDs in the field of LSCs and provide a theoretical basis for their application in photovoltaic conversion.
基金supported by the National Natural Science Foundation of China(Nos.21975276 and 52102329)Shanghai Science and Technology Committee(No.20520710800)C.L.appreciates the support by Program of Shanghai Academic Research Leader(No.21XD1424400).
文摘The polyethylene oxide(PEO)based solid-state batteries are considered as promising candidates for the next-generation Li metal batteries with high energy density and safety.However,the low Li-ion conductivity and high-voltage endurability hinder the further applications of PEO-based electrolytes.To overcome these issues,herein two-dimensional(2D)CeF_(3)nanoplates with maximally exposed[001]crystal faces are introduced into the PEO matrix to expand the electrochemical window and improve Liion conduction and transport.The optimized crystal shape and crystal face anisotropy of CeF_(3)nanoplate filler reduce the crystallinity of composite solid polymer electrolyte(CSPE)via its Lewis acid-base interaction with ether oxygen of PEO.The Liaffinity[100]and Li-repellent[001]crystal faces of CeF_(3)nanoplates synergistically realize the dissociation of lithium bis(trifluoromethanesulfonyl)imide(LiTFSI),fast Li-adsorption/desorption,and Li+migration.The optimized CSPE-0.1CeF_(3)membrane enables the achievement of Li metal batteries with high endurability and stability,from the kinetically favorable Li/Li symmetric cells with long-term cycling over 8000 h.The highly reversible Li/LiFePO_(4) cells exhibit a capacity retention of 109.2 mAh·g^(−1)after 1000 cycles at 1 C,corresponding to a low capacity fading rate of 0.026%per cycle.The conversion-type allsolid-state Li/CSPE-0.1CeF_(3)/FeF_(3)cells show a high reversible capacity of 201.9 mAh·g^(−1)after long-term 600 cycles and of 231.1 mAh·g^(−1)at an ultra-high rate of 5 C.
文摘A high-repetition-rate eye-safe optical parametric oscillator （OPO）, using a non-critically phase-matched KTP crystal intracavity pumped by a passively Q-switched Nd：GdVO4/Cr^4＋ ：YAG laser, is experimentally demonstrated. The conversion efficiency for the average power is 7% from pump diode input to OPO signal output and the slope efficiency is up to 10.3%. With an incident pump power of 7,3 W, the compact intracavity OPO （IOPO） cavity, operating at 15 kHz, produces an average power of 0.57 W at 1570 nm with a pulse width as short as 6 ns. The peak power at 1570 nm is higher than 6.3 kW.
基金This work was supported by the European Regional Development Fund and the state budget of the Czech Republic project HiLASE CoE(CZ.02.1.01/0.0/0.0/15_006/0000674)the Horizon 2020 Framework Programme(H2020)(739573).
文摘We report on frequency doubling of high-energy,high repetition rate ns pulses from a cryogenically gas cooled multi-slab ytterbium-doped yttrium aluminum garnet laser system,Bivoj/DiPOLE,using a type-I phase matched lithium triborate crystal.We achieved conversion to 515 nm with energy of 95 J at repetition rate of 10 Hz and conversion efficiency of 79%.High conversion efficiency was achieved due to successful depolarization compensation of the fundamental input beam.
基金the Scientific Research Foundation of Harbin Institute of Technology
文摘A low-threshold middle-infrared （mid-IR） MgO：PPLN optical parametric generation （OPG） pumped by a laser diode （LD） end-pumped Z-type Nd：YLF laser at 1047 nm is realized with high reflectivity（HR） mirror for signal. At repetition rate of 10 kHz, the OPG threshold of 50 μJ has been achieved with HR mirror for signal. Compared with the threshold without mirror, the threshold decreases by 17%. Using HR mirror for pump at output side of crystal, the threshold of 40 μJ is achieved. The 2.7 - 4.1 μm continuous tunable output is produced with seven grating periods from 28.5 to 31.5 μm and temperatures from 30 to 200 ℃. When the incident average pump power is 3 W, the OPG idler output power is 0.46 W at 3.26 μm, which corresponds to optical-to-optical conversion efficiency up to 15.3%.
