Method for fabrication work function-tunable ionic liquid-functionalized poly-3,4-ethylenedioxythiophene:poly-styrenesulfonate film

Abstract

A method for manufacturing a work function-tunable ionic liquid-functionalized poly-3,4-ethylenedioxythiophene:poly-styrenesulfonate (PEDOT:PSS) film. The method comprises: a pretreatment step, a film formation step, a film treatment step, and an ionic liquid treatment step. In the pretreatment step, a pretreatment solution is prepared by mixing PEDOT:PSS solution with methanol. In the film formation step, the pretreatment solution is blade-coated onto a substrate and subsequently annealing to form a first-stage film. In the film treatment step, dimethyl sulfoxide(DMSO) is blade-coated onto the first-stage film, followed by annealing. The DMSO-treated first-stage film washed with methanol to remove residual DMSO, forming a second-stage film. In the ionic liquid treatment step, an ionic liquid is ultrasonically agitated in deionized water to prepare an ionic liquid solution. This solution is blade-coated onto the second-stage film. The film is annealed washed with deionized water to remove the ionic liquid, thereby obtaining the ionic liquid-functionalized PEDOT:PSS film.

Dependencies are inferred from the claim text.