Highly Efficient Organic UV Photodetectors Based on Polyfluorene and Naphthalenediimide Blends: Effect of Thermal Annealing

Figure 7

AFM phase images of PFE.BNDI (3 : 1) films annealed at different temperatures: (a) RT, RMS roughness: 11.2, (b) 40°C, RMS roughness: 10.4, (c) 60°C, RMS roughness: 7.5, and (d) 80°C, RMS roughness: 11.6.

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(b)

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(d)