Inkjet-printed silver nanoparticle electrodes on GaN-based micro-structured light-emitting diodes

Wu, Muying; Gong, Zheng; Massoubre, David; Zhang, Yanfeng; Richardson, E.; Gu, Erdan; Dawson, Martin D.

doi:10.1007/s00339-011-6506-x

Cited by 6 publications

(3 citation statements)

References 17 publications

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“…Metallic nanoparticulate inks have received considerable attention in recent years for their use in printing applications, such as microelectrodes, light emitting diodes (LEDs), organic transistors, recongurable antennas, radio frequency identication tags (RFIDs), bio-circuits and many more. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17] Silver and gold nanoparticles are widely used in conductive inks due to their high conductivity, thermal stability, and chemical inertness. [18][19][20] Silver nanoparticles have oen been synthesized through various colloidal processes.…”

Section: Introductionmentioning

confidence: 99%

Highly conductive short chain carboxylic acid encapsulated silver nanoparticle based inks for direct write technology applications

et al. 2013

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In this study silver nanoparticles were synthesized with short chain (C6-C10) carboxylic acids as capping agents and prepared as conductive inks for fabricating electrically conductive patterns using direct write technologies. The structural characterization of as-synthesized nanoparticles revealed that the particles are spherical in shape with narrow size distribution (4.1 to 4.7 nm) and have face centered cubic crystal structure. Silver-particle-based inks were prepared by dispersing the particles in toluene and separating non-dispersing particles from the inks. The loading of silver particles in the solvent was increased with the increasing chain length of capping agents. As a result, inks with a wide range of nanoparticulate concentrations ($3 to 66 wt%) were able to be prepared and most of these inks were stable for at least a month. All the inks exhibited shear thinning behavior and this shear thinning became more prominent for higher concentration inks. As the nanoparticle concentration of the inks was increased, surface tension was decreased and the contact angles of the inks with the KaptonÒ and glass were increased. Printing of microelectrodes, lines and films was carried out using aerosol jet printing and ultrasonic spray coating. The conductivity of printed microelectrodes was 10 to 87% of the bulk silver conductivity with the sintering temperatures as low as 130 to 250 C depending on the ink used.

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Section: Introductionmentioning

confidence: 99%

Highly conductive short chain carboxylic acid encapsulated silver nanoparticle based inks for direct write technology applications

et al. 2013

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“…The Ag nanoparticles (Silver-jet DGP, 40% w/w) were printed with a Dimatix DMP-2800 system as in [14]. Each pixel was finally individually wire bonded to a printed circuit board for characterization purposes.…”

Section: Device Fabrication and Characterizationmentioning

confidence: 99%

Sub-Micron Lithography Using InGaN Micro-LEDs: Mask-Free Fabrication of LED Arrays

Guilhabert

Massoubre

Richardson

et al. 2012

IEEE Photon. Technol. Lett.

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The fabrication of gallium-nitride (GaN)-based light-emitting diode (LED) arrays by a direct writing technique, itself using micron-sized LEDs (micro-LEDs), is reported. CMOSdriven ultraviolet GaN-based micro-LED arrays are used to pattern photoresist layers with feature sizes as small as 500 nm. Checkerboard-type square LED array devices are then fabricated using such photoresist patterns based on either single pixel or multipixel direct writing, and implemented as part of a completely mask-less process flow. These exemplar arrays are composed of either 450-nm-emitting 199 × 199 µm 2 pixels on a 200-µm pitch or 520-nm-emitting 21 × 18 µm 2 pixels on a 23-µm pitch. Fill factors of 99% and 71.5% are achieved with optical output power densities per pixel of 5 and 20 W/cm 2 at 90-and 6-mA dc-injected currents, respectively.Index Terms-Gallium nitride, micro light-emitting diodes (micro-LEDs), nanolithography, semiconductor device manufacture.

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“…Despite efficient micro-blue and white light emitting diodes (LEDs) based on GaN/InGaN multi-quantum-wells (MQWs), the plasmonic effect integrated with metallic nanostructures as one promising method to further improve the opto-electrical performance of micro-LEDs still gains enormous interest [1,2]. Plasmonic micro-LEDs have recently become the forefront of research and development aimed at the creation of new extremely efficient micro emitters for the visible-ultraviolet (UV) spectral range and visible light communication [3,4]. The localized surface plasmons (LSPs) can efficiently and rapidly oscillate with exciton energy in MQWs [5][6][7][8][9][10][11][12][13][14][15], which causes changes of polarization and internal quantum efficiency [16,17].…”

Section: Introductionmentioning

confidence: 99%

Nanoscale Characterization of Surface Plasmon-Coupled Photoluminescence Enhancement in Pseudo Micro Blue LEDs Using Near-Field Scanning Optical Microscopy

Zhang

et al. 2020

Nanomaterials

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The microcave array with extreme large aspect ratio was fabricated on the p-GaN capping layer followed by Ag nanoparticles preparation. The coupling distance between the dual-wavelength InGaN/GaN multiple quantum wells and the localized surface plasmon resonance was carefully characterized in nanometer scale by scanning near-field optical microscopy. The effects of coupling distance and excitation power on the enhancement of photoluminescence were investigated. The penetration depth was measured in the range of 39-55 nm depending on the excitation density. At low excitation power density, the maximum enhancement of 103 was achieved at the optimum coupling distance of 25 nm. Time-resolved photoluminescence shows that the recombination life time was shortened from 5.86 to 1.47 ns by the introduction of Ag nanoparticle plasmon resonance.Nanomaterials 2020, 10, 751 2 of 10 given by Z = λ/2π[(ε GaN -ε metal )/ε metal 2 ] 1/2 where ε GaN and ε metal are the real parts of the dielectric

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Inkjet-printed silver nanoparticle electrodes on GaN-based micro-structured light-emitting diodes

Cited by 6 publications

References 17 publications

Highly conductive short chain carboxylic acid encapsulated silver nanoparticle based inks for direct write technology applications

Highly conductive short chain carboxylic acid encapsulated silver nanoparticle based inks for direct write technology applications

Sub-Micron Lithography Using InGaN Micro-LEDs: Mask-Free Fabrication of LED Arrays

Nanoscale Characterization of Surface Plasmon-Coupled Photoluminescence Enhancement in Pseudo Micro Blue LEDs Using Near-Field Scanning Optical Microscopy

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