A facile way to pattern PEDOT:PSS film as an electrode for organic devices

作者：Kostianovskii Vladislav; Sanyoto Bernardi; Noh Yong Young

来源：Organic Electronics, 2017, 44: 99-105.

DOI：10.1016/j.orgel.2017.02.007

• PEDOT:PSS
• Patterning
• Organic field-effect transistors
• Conjugated polymers
• Oxide-free organic electronics
• Solution process

We report a facile and high resolution patterning method for conductive polymer films as transparent electrodes for organic devices on various substrates. The reliable pattern of PEDOT:PSS film is demonstrated by selective oxygen plasma etching via a defined copper (Cu) protection layer deposited by thermal evaporation. The overcoated Cu layer is removed by a wet etching process without damage to the underlying PEDOT:PSS layer. The minimum patterning feature size is determined by the resolution of the mask for Cu deposition and has shown to reach twenties of micro-meters. The patterned PEDOT:PSS film is successfully applied as source-drain electrodes for the organic field effect transistors (OFETs), and as a transparent anode in organic photodiodes (OPDs). Performance of flexible PEDOT: PSS-based OPDs exceeds a conventional flexible IZO-anode OPDs (6.6 mA/W vs. 1.4 mA/W, respectively). The contact resistance of PEDOT:PSS electrodes in OFETs is found to be 10 times lower (9.8 x 10(2) Omega cm), than that for Au counterparts. The hole mobility was 0.29 cm(2)/V s for both electrode materials and used DPPT-TT semiconductor polymer.

• 出版日期2017-5