Stretchable circuits based on liquid metals are promising for wearables but the lack of scalable processes for sintering of printed liquid metal dispersions constitutes a challenge for large-area and high-volume manuf...Stretchable circuits based on liquid metals are promising for wearables but the lack of scalable processes for sintering of printed liquid metal dispersions constitutes a challenge for large-area and high-volume manufacturing.In this work,materials and methods for fully screen printed stretchable liquid metal multilayer circuits have been developed.The ink is based on liquid metal droplets dispersed in the green solvent propylene glycol using the harmless dispersion agent polyvinylpyrrolidone.The development of a scalable water-spray sintering method in combination with ink optimization yielded highly conductive prints of≈7.3×10^(5)S/m.Interestingly,the printed conductors experienced a resistance increase of less than 10%during 50%strain cycling,which is far below the expected 125%increase due to the geometry factor.The process allows for printing of highperformance multilayer circuits,which is demonstrated by the development of printed stretchable near-field communication tags.展开更多
The potential of the screen printing method for large-scale production of organic electrochemical transistors(OECTs),combining high production yield with low cost,is here demonstrated.Fully screen-printed OECTs of 1 m...The potential of the screen printing method for large-scale production of organic electrochemical transistors(OECTs),combining high production yield with low cost,is here demonstrated.Fully screen-printed OECTs of 1 mm^(2) area,based on poly(3,4-ethylenedioxythiophene)doped with poly(styrensulfonate)(PEDOT:PSS),have been manufactured on flexible polyethylene terephthalate(PET)substrates.The goal of this project effort has been to explore and develop the printing processing to enable high yield and stable transistor parameters,targeting miniaturized digital OECT circuits for large-scale integration(LSI).Of the 760 OECTs manufactured in one batch on a PET sheet,only two devices were found malfunctioning,thus achieving an overall manufacturing yield of 99.7%.A drain current ON/OFF ratio at least equal to 400 was applied as the strict exclusion principle for the yield,motivated by proper operation in LSI circuits.This consistent performance of low-footprint OECTs allows for the integration of PEDOT:PSS-based OECTs into complex logic circuits operating at high stability and accuracy.展开更多
Correction to:npj Flexible Electronics https://doi.org/10.1038/s41528-020-0078-9,published online 3 August 2020 The original version of the Supplementary Information associated with this Article contained an error in ...Correction to:npj Flexible Electronics https://doi.org/10.1038/s41528-020-0078-9,published online 3 August 2020 The original version of the Supplementary Information associated with this Article contained an error in Supplementary Fig.3,in which the bottom part of the figure is not displayed.展开更多
基金supported by the Swedish Foundation for Strategic Research,the Swedish Research Council(2023-04694)the Knut and Alice Wallenberg Foundation(Wallenberg Academy Fellow)the Swedish Government Strategic Research Area in Materials Science on Functional Materials at Linköping University(Faculty Grant SFO Mat LiU No 200900971).
文摘Stretchable circuits based on liquid metals are promising for wearables but the lack of scalable processes for sintering of printed liquid metal dispersions constitutes a challenge for large-area and high-volume manufacturing.In this work,materials and methods for fully screen printed stretchable liquid metal multilayer circuits have been developed.The ink is based on liquid metal droplets dispersed in the green solvent propylene glycol using the harmless dispersion agent polyvinylpyrrolidone.The development of a scalable water-spray sintering method in combination with ink optimization yielded highly conductive prints of≈7.3×10^(5)S/m.Interestingly,the printed conductors experienced a resistance increase of less than 10%during 50%strain cycling,which is far below the expected 125%increase due to the geometry factor.The process allows for printing of highperformance multilayer circuits,which is demonstrated by the development of printed stretchable near-field communication tags.
基金This work was primarily supported by the Swedish foundation for Strategic Research(Silicon-Organic Hybrid Autarkic Systems,Reference number:SE13-0045).
文摘The potential of the screen printing method for large-scale production of organic electrochemical transistors(OECTs),combining high production yield with low cost,is here demonstrated.Fully screen-printed OECTs of 1 mm^(2) area,based on poly(3,4-ethylenedioxythiophene)doped with poly(styrensulfonate)(PEDOT:PSS),have been manufactured on flexible polyethylene terephthalate(PET)substrates.The goal of this project effort has been to explore and develop the printing processing to enable high yield and stable transistor parameters,targeting miniaturized digital OECT circuits for large-scale integration(LSI).Of the 760 OECTs manufactured in one batch on a PET sheet,only two devices were found malfunctioning,thus achieving an overall manufacturing yield of 99.7%.A drain current ON/OFF ratio at least equal to 400 was applied as the strict exclusion principle for the yield,motivated by proper operation in LSI circuits.This consistent performance of low-footprint OECTs allows for the integration of PEDOT:PSS-based OECTs into complex logic circuits operating at high stability and accuracy.
文摘Correction to:npj Flexible Electronics https://doi.org/10.1038/s41528-020-0078-9,published online 3 August 2020 The original version of the Supplementary Information associated with this Article contained an error in Supplementary Fig.3,in which the bottom part of the figure is not displayed.
