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laser fabrication of graphene-based supercapacitors

Photonics Research 2020年第4期8卷 577-588页

作者： XIU-YAN FU ZHAO-DI CHEN DONG-DONG HAN YONG-LAI ZHANG HONG XIA HONG-BO SUN State Key Laboratory of Integrated Optoelectronics College of Electronic Science and EngineeringJilin UniversityChangchun 130012China State Key Laboratory of Precision Measurement Technology and Instruments Department of Precision InstrumentTsinghua UniversityBeijing 100084China

Supercapacitors(SCs)have broad applications in wearable electronics(e.g.,e-skin,robots).Recently,graphenebased supercapacitors(G-SCs)have attracted extensive attention for their excellent flexibility and electrochemical performance.laser fabrication of G-SCs exhibits obvious superiority because of the simple procedures and integration compatibility with future electronics.Here,we comprehensively summarize the state-of-the-art advancements in laser-assisted preparation of G-SCs,including working mechanisms,fabrication procedures,and unique characteristics.In the working mechanism section,electric double-layer capacitors and pseudocapacitors are introduced.The latest advancements in this field are comprehensively summarized,including laser reduction of graphene oxides,laser treatment of graphene prepared from chemical vapor deposition,and laserinduced graphene.In addition,the unique characteristics of laser-enabled G-SCs,such as structured graphene,graphene hybrids,and heteroatom doping graphene-related electrodes,are presented.Subsequently,laser-enabled miniaturized,stretchable,and integrated G-SCs are also discussed.It is anticipated that laser fabrication of G-SCs holds great promise for developing future energy storage devices.

关键词： laser fabrication graphene-based supercapacitors

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Diffusion dynamics and characterization of attogram masses in optically trapped single nanoparticles using laser-induced plasma imaging

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Nano Research 2023年第5期16卷 7470-7480页

作者： Pablo Purohit Francisco J.Fortes Javier laserna UMAlaserLAB Departamento de Química AnalíticaUniversidad de MálagaC/Jiménez Fraud 4Malaga 29010Spain Niels Bohr Institute University of CopenhagenBlegdamsvej 172100 CopenhagenDenmark

In the present work,a wavelength-selected plasma imaging analysis system is presented and used to track photons emitted from single-trapped nanoparticles in air at atmospheric pressure.The isolated nanoentities were atomized and excited into plasma state using single nanosecond laser pulses.The use of appropriate wavelength filters alongside time-optimized acquisition settings enabled the detection of molecular and atomic emissions in the plasma.The photon detection efficiency of the imaging line resulted in a signal>400 times larger than the simultaneously-acquired dispersive spectroscopy data.The increase in sensitivity outlined the evolution of diverse physicochemical processes at the single particle scale which included heat and momentum transfer from the plasma into the particle as wells as chemical reactions.The imaging detection of excited fragments evidenced different diffusion kinetics and time frames for atoms and molecules and their influence upon both the spectroscopic emission readout and fabrication processes using the plasma as a reactor.Moreover,the origin of molecular species,whether naturally-occurring or derived from a chemical reaction in the plasma,could also be studied on the basis of compositional gradients found on the images.Limits of detection for the inspected species ranged from tens to hundreds attograms,thus leading to an exceptional sensing principle for single nanoentities that may impact several areas of science and technology.

关键词： single nanoparticle inspection wavelength-selected laser-induced plasma imaging laser fabrication attogram characterization atomic/molecular diffusion

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Improved performance of organic light-emitting devices by integrating microstructure

Improved performance of organic light-emitting devices by in...

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中国真空学会2014学术年会

作者： Yan-Gang Bi Jing Feng Hong-Bo Sun State Key Laboratory on Integrated Optoelectronics College of Electronic Science and EngineeringJilin University

Due to the promising applications in full-color flat-panel displays and solid-state lighting sources,organic light-emitting devices(OLEDs)have attracted considerable interests since their discoveries.Light extraction in OLEDs has been an active area of research because of significant power loss arising from substrate modes from the total internal reflection at the glass substrate/air interface,waveguide(WG)modes in organic/indium-tinoxide(ITO)anode layers,and surface plasmon-polariton(SPP)modes associated with the metallic electrode/organic interface.Microstructures with wavelength to subwavelength-scale periodicity have played important roles in optical and optoelectronic devices through manipulating the generation and propagation of photons in materials.We have investigated systematically the laser fabrication of microstructures in organic optoelectronic devices and their effects on improving the device performance.The WG and SPP modes that were generally lost in conventional bottom-emitting OLEDs have been successfully recovered by employing the microstructure,and a much enhanced light extraction has been observed.Dual-periodic corrugations which excite the SPPs resonance at two separate wavelengths have been introduced into the metallic electrodes of the white organic light-emitting devices(WOLEDs)to realize a broadband light extraction.

关键词： microstructure laser fabrication organic light-emitting devices surface plasmon-polariton

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