Characteristic Evaluation of Organic Light-Emitting Diodes Prepared with Stamp Printing Technique

Figure 7

AFM images of the organic thin films: (a) PEDOT:PSS, (b) PEDOT:PSS/spin TPBi, (c) release film/spin TPBi, and (d) PEDOT:PSS/RF stamp TPBi.

(a)

(b)

(c)

(d)