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

Figure 4

Absorption and photoluminescence spectra of (a) and (b) PFE : BNDI (1 : 1–5); (c) and (d) PFE : BNDI (1–5 : 1).

(a)

(b)

(c)

(d)