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(Color online) Schematic diagrams showing the surface treatment method of screen-printed CNT films by (a) adhesive taping, (b) PDMS elastomer, and (c) PDMS elastomer of the triode-type structure with a top gate.
(Color online) SEM images of the printed CNT film and a line profile of the AFM image: (a) as-deposited CNT film and (b) PDMS layer detached from the cathode. The inset shows a process of the PDMS layer detachment from the cathode surface, (c) inhomogeneous surface of the CNT film treated by the PDMS elastomer, (d) cross-sectional SEM image showing the optimal surface morphology after PDMS elastomer treatment, (e) AFM image of the surface of the screen-printed CNT film.
(Color online) Curves of the current versus voltage and the corresponding emission images (active area of ) from the screen-printed CNT film after and before surface treatment: (a) measured curves. The inset in (a) shows that few pixels emit electrons in the as-deposited CNT film, (b) and (c) phosphor screen images after the surface treatment (at the anode voltage of and ).
(Color online) (a) Schematic diagram of the triode-type structure prepared for PDMS treatment, (b) PDMS layer detached from the cathode, (c) emission image of a triode structure panel using the green phosphor anode plate, (d) curves of the gate current vs the anode current with time at a fixed voltage.
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