Doubly ortho-linked cis-4,4'-bis(diarylamino)stilbene/fluorene hybrids as efficient nondoped, sky-blue fluorescent materials for optoelectronic applications

The titled hybrids bearing a central dibenzosuberene optoelectronic unit with functional C3 and C7, N,N-diarylamino appendages, and spiro-fluorene junction act as blue fluorescent OLED materials. Sharp blue fluorescent (464 nm, Delta lambda(fwhm) = 47-60 nm) OLED devices can thus be furnished with a high eta(ext) of 7.9%, L-20 of 2689 cd/m(2), eta(c) of 13.6 (cd/A), and eta(p) of 8.2 (lm/W) at 20 mA/cm(2).