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Drying-Mediated Self-Assembly of Graphene for Inkjet Printing of High-Rate Micro-supercapacitors

Nano-Micro Letters 2020年第3期12卷 155-168页

作者： Szymon Sollami Delekta Mika‑Matti Laurila Matti Mantysalo Jiantong Li School of Electrical Engineering and Computer Science KTH Royal Institute of TechnologyElectrum 22916440 KistaSweden Laboratory for Future Electronics Faculty of Information Technology and Communication SciencesTampere University33720 TampereFinland

Scalable fabrication of high-rate micro-supercapacitors(MSCs)is highly desired for on-chip integration of energy storage *** virtue of the special self-assembly behavior of 2D materials during drying thin films of their liquid dispersion,a new inkjet printing technique of passivated graphene micro-flakes is developed to directly print MSCs with 3D networked porous *** presence of macroscale through-thickness pores provides fast ion transport pathways and improves the rate capability of the devices even with solid-state *** multiple-pass printing,the porous microstructure effectively absorbs the successively printed inks,allowing full printing of 3D structured MSCs comprising multiple vertically stacked cycles of current collectors,electrodes,and sold-state *** all-solid-state heterogeneous 3D MSCs exhibit excellent vertical scalability and high areal energy density and power density,evidently outperforming the MSCs fabricated through general printing techniques.

关键词： High-rate micro-supercapacitor 3D micro-supercapacitor Drying-mediated self-assembly Graphene Inkjet printing

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Luminescent line art by direct-write patterning

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Light(Science & Applications) 2016年第1期5卷 518-521页

作者： Erik Mattias Lindh Andreas Sandström Mats Roland Andersson Ludvig Edman The Organic Photonics and Electronics Group UmeaUniversityUmeaSweden LunaLEC AB UmeaSweden Future Industries Institute University of South AustraliaMawson LakesSA 5095Australia

We present a direct-write patterning method for the realization of electroluminescent(EL)line art using a surface-emissive light-emitting electrochemical cell with its electrolyte and EL material separated into a bilayer *** line-art emission is achieved through subtractive patterning of the electrolyte layer with a stylus,and the single-step patterning can be either manual for personalization and uniqueness or automated for high throughput and *** demonstrate that the light emission is effectuated by cation-assisted electron injection in the patterned regions and that the resulting emissive lines can be as narrow as a few *** versatility of the method is demonstrated through the attainment of a wide range of light-emission patterns and colors using a variety of different *** that this low-voltage-driven and easy-to-modify luminescent line-art technology could be of interest for emerging applications,such as active packaging and personalized gadgets.

关键词： direct-write patterning light-emitting electrochemical cell luminescent line art organic electronics

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by a cascade optical field modulation strategy facilitating selective multispectral narrow-band near-infrared photodetection

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Light(Science & Applications) 2020年第1期9卷 229-240页

作者： Yanan Ji Wen Xu Nan Ding Haitao Yang Hongwei Song Qingyun Liu Hans Agren Jerker Widengren Haichun Liu State Key Laboratory of Integrated Optoelectronics College of Electronic Science and EngineeringJilin University130012 ChangchunChina Department of Theoretical Chemistry and Biology KTH Royal Institute of TechnologySE-10691StockholmSweden Department of Applied Physics KTH Royal Institute of TechnologySE-10691StockholmSweden

Since selective detection of multiple narrow spectral bands in the near-infrared(NIR)region still poses a fundamental challenge,we have,in this work,developed NIR photodetectors(PDs)using photon upconversion nanocrystals(UCNCs)combined with perovskite *** conquer the relatively high pumping threshold of UCNCs,we designed a novel cascade optical field modulation strategy to boost upconversion luminescence(UCL)by cascading the superlensing effect of dielectric microlens arrays and the plasmonic effect of gold nanorods,which readily leads to a UCL enhancement by more than four orders of magnitude under weak light *** accommodating multiple optically active lanthanide ions in a core-shell-shell hierarchical architecture,developed PDs on top of this structure can detect three well-separated narrow bands in the NIR region,i.e.,those centered at 808,980,and 1540 *** to the large UCL enhancement,the obtained PDs demonstrate extremely high responsivities of 30.73,23.15,and 12.20 AW^(−1) and detectivities of 5.36,3.45,and 1.91×10^(11) Jones for 808,980,and 1540 nm light detection,respectively,together with short response times in the range of 80-120 ***,we demonstrate for the first time that the response to the excitation modulation frequency of a PD can be employed to discriminate the incident light *** believe that our work provides novel insight for developing NIR PDs and that it can spur the development of other applications using upconversion nanotechnology.

关键词： narrow bands spectral

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