期刊
ORGANIC ELECTRONICS
卷 44, 期 -, 页码 99-105出版社
ELSEVIER
DOI: 10.1016/j.orgel.2017.02.007
关键词
PEDOT:PSS; Patterning; Organic field-effect transistors; Conjugated polymers; Oxide-free organic electronics; Solution process
资金
- Nano Material Technology Development Program through the National Research Foundation of Korea - Ministry of Science, ICT & Future Planning (MSIP, Korea) [2014M3A7B4051745]
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. (C) 2017 Elsevier B.V.
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