A facile way to pattern PEDOT: PSS film as an electrode for organic devices
- 저자
- Vladislav Kostianovskii, Bernardi Sanyoto, Yong-Young Noh*
- 저널명
- Organic Electronics, 44, 99-105 (2017)
- 년도
- 2017
- Link
- https://doi.org/10.1016/j.orgel.2017.02.007 157회 연결
[Abstract]
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 × 102 Ω cm), than that for Au counterparts. The hole mobility was 0.29 cm2/V s for both electrode materials and used DPPT-TT semiconductor polymer.