Mesoscale Control of Organic Crystalline Thin Films: Effects of Film Morphology on the Performance of Organic Transistors

다국어 초록 (Multilingual Abstract)

We report mesoscale control of small molecular 6,13-bis(triisopropylsilylethynyl) pentacene(TIPS-pentacene) crystalline thin films by varying the solute concentration in the fluidic channelmethod. A stepwise increase in the TIPS-pentacene concentration in the solution enabled us toprepare highly-crystallized ribbons, thin films, and thick films in a mesoscale range, respectively.
All three types of deposited films exhibited an in-plane crystalline nature of (001) direction beingnormal to the substrate as well as crystalline domain growth parallel to the direction of the recedingmeniscus inside the fluidic channel. In addition, the film’s morphology and thickness were foundto have a great influence on the field-effect mobility of the transistors, and the highest average andmaximum mobilities were achieved from transistors with thin-film semiconductor channels.

참고문헌 (Reference)

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