Page 156 - Handbook of Adhesion Promoters

8.7 Poly(3,4-ethylenedioxythiophene) 149

Figure 8.6. Adhesion improvement of PEDOT by combination of IrO x and platinum. [Adapted, by permission,
from Boehler, X; Oberueber, F; Schlabach, S; Stieglitz, Asplund, M, ACS Appl. Mater. Interfaces, 9, 189-97,
2017.]

8.7 POLY(3,4-ETHYLENEDIOXYTHIOPHENE)
The poor adhesion of poly(3,4-ethylenedioxythiophene) (PEDOT) to metallic substrates,
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has impeded its broader applications. Iridium oxide demonstrated exceptional stability in
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PEDOT coatings. The nanostructured platinum gives a purely mechanical adhesion pro-
motion providing 10-fold adhesion improvement compared to the smooth Pt substrates by
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simply altering the morphology of Pt (Figure 8.6).
The 9,9-bis(alkynyl)fluorenyl compound containing triethoxysilane moieties has
found application as an adhesion promoter in the production of electroactive devices
including opto-electronic devices, organic light emitting devices, electroluminescent
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devices, photovoltaics, and organic thin film transistors containing PEDOT.
Polyolefin was modified with one or more silanes used as an adhesion promoter for
the production of flat glass/glass, glass/plastic, or plastic/plastic laminates with a conduc-
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tive layer made out of PEDOT.
REFERENCES
1 Boehler, X; Oberueber, F; Schlabach, S; Stieglitz, Asplund, M, ACS Appl. Mater. Interfaces, 9, 189-97,
2017.
2 Lewis, LN; Manivannan, V; Faircloth, TJ; Liu, J; Cella, JA, US7625596, General Electric Company,
Dec. 1, 2009.
3 Becker, HG; Zagefka, H-D; Wey, HG; Schmidt, FG; Hoppe, D; Kothe, M, US9550344, Evonik Degussa
GmbH, Jan. 24, 2017.