Pyrene-functionalized carbazole derivatives as non-doped blue emitters for highly efficient blue organic light-emitting diodes

A new class of pyrenyl solid-state emitters: 1-pyrenyl ynones. Synthesisviathe Friedel–Crafts route, molecular and electronic structure and photophysical properties

“…[35][36][37] Moreover, such uorophores bearing a at p-conjugated pyrene moiety are relatively rare. [38][39][40] Strong yellow solid-state emission of 1a-d, with long uorescence decays, makes them promising candidates for the design of luminescent materials and devices.…”

Star-Shaped Asymmetrically Substituted Blue Emitting Carbazoles: Synthesis, Photophyscial, Electrochemical and Theoretical Investigations

“…Among the dyes, 5 b and 5 d exhibited superior thermal stability over their fluorene ( 5 a ) and carbazole ( 5 c ) analogues attributable to the presence of rigid pyrene and triphenylamine functionality. Enhancement in thermal stability of the organic materials due to the presence of pyrene and triphenylamine chromophores has been adequately documented in the literature ,. Relatively facile decomposition observed for 5 a and 5 c may be because of the fragile alkyl chains .…”

Blue-light-emitting and hole-transporting molecular materials based on amorphous triphenylamine-functionalized twisted binaphthyl

“…These results are close to previously reported performances for OLEDs based on anthracene-containing binaphthol chromophores compounds (0.7-1.5 cd/A) [13b], dispiro-Xanthene-indenofluorene (1.0 cd/A) [17], fluorine-based compounds TCPC-6 (1.35 cd/A) [18]. However, they are lower than with the anthracene derivative with a tetraphenylethylene group (3.1 cd/A) [19], the pyrene-functionalized carbazole derivative (2.53 cd/A) [20] and device based on benzenelinked tetraphenylethene compounds (2.3-5.0 cd/A) [21]. Both A and B types of device have the advantages of low operating voltages and narrow EL luminance peaks.…”