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(Color online) (a) Chemical structure of a unique low-temperature processable, inherently photosensitive polyimide. (b) Optical microscope image for the negatively patterned polyimide gate insulator.
(Color online) (a) Schematic cross section of pentacene OTFT with the low-temperature processable photosensitive polyimide. (b) Flexible pentacene OTFT fabricated on PES substrate.
(Color online) (a) and (b) Output and transfer characteristic curves, respectively, of OTFT with as-prepared polyimide on ITO glass substrate. (c) and (d) Output and transfer characteristic curves, respectively, of OTFT with the patterned polyimide on PES substrate. The OTFT has a -thick gate insulator and -thick pentacene layer. Inset: AFM images of the -thick pentacene film deposited on top of the as-prepared and patterned gate insulator.
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