Figure 1. a) Chemical structures of PBDB-T, BZ4F-O-1, BZO-4F
and BZO-4Cl; b) Normalized absorption spectra of PBDB-T, BZ4F-O-1,
BZO-4F and BZO-4Cl in neat films; c) The energy levels alignment of
PBDB-T, BZ4F-O-1, BZO-4F and BZO-4Cl.
Table 1. The optical absorption and electronic energy level
properties of PBDB-T, BZ4F-O-1, BZO-4F and BZO-4Cl.