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Stepwise Aggregation Control of PEDOT:PSS Enabled High-Conductivity, High-Resolution Printing of Polymer Electrodes for Transparent Organic Phototransistors.

Xixi XiaoXianfeng ShenYuan TieYaru ZhaoRuhe YangYiming LiWeizhen LiLiqun TangRongjin LiYi-Xuan WangWenping Hu
Published in: ACS applied materials & interfaces (2024)
Electrohydrodynamic (EHD) jet printing is a widely employed technology to create high-resolution patterns and thus has enormous potential for circuit production. However, achieving both high conductivity and high resolution in printed polymer electrodes is a challenging task. Here, by modulating the aggregation state of the conducting polymer in the solution and solid phases, a stable and continuous jetting of PEDOT:PSS is realized, and high-conductivity electrode arrays are prepared. The line width reaches less than 5 μm with a record-high conductivity of 1250 S/cm. Organic field-effect transistors (OFETs) are further developed by combining printed source/drain electrodes with ultrathin organic semiconductor crystals. These OFETs show great light sensitivity, with a specific detectivity ( D *) value of 2.86 × 10 14 Jones. In addition, a proof-of-concept fully transparent phototransistor is demonstrated, which opens up new pathways to multidimensional optical imaging.
Keyphrases
  • high resolution
  • mass spectrometry
  • carbon nanotubes
  • water soluble
  • signaling pathway
  • high speed
  • tandem mass spectrometry
  • high frequency