Poly-4-vinylphenol Dielectrics

In 1998 the commercially available polymer PVP (Mw 20,000) was introduced as a dielectric layer for organic TFTs by the Philips group [19]. It is soluble in common organic solvents (e.g. acetone, n-butanol, propylene glycol monomethyl ether ace- 

The resulting flexible films withstand treatment with chemicals such as acetone, alcohols, and neutral aqueous etch formulations, but are sensitive to very basic solutions. It should be noted that significantly larger concentrations of the cross-linking agent in the polymer formulation will result in more ridged films, and 

Irrespective of the process flow, the PVP withstands treatment with the chemi- 

Another important quality criterion for dielectric materials in organic TFTs is their hysteresis. Hysteresis is the shift in threshold voltage depending on the direc- 

One dominating factor for hysteresis in organic polymers is related to the pres- 

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Li, Y., Torah, R., Beeby, S., Tudor, J., 2012. An aU-inkjet printed flexible capacitor on a textile using a new poly (4-vinylphenol) dielectric ink for wearable applications. In IEEE Sensors. pp. 1. http //dx.doi.org/10.1109/ICSENS.2012.6411117. 

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