Benzo[b]carbazole and indole derivatives as emitters for non-doped deep-blue organic light emitting diodes

Rational designs of structurally similar TADF and HLCT emitters with benzo- or naphtho-carbazole units as electron donors

“…So the fusions of a benzene or naphthalene on the one-sided benzene ring of CZ could expand the π-conjugation and keep the electron-donating ability of CZ . 44–48 The CZ -based donors could be diversified in the form of the structural isomers through the extended conjugation in different directions. Thus donor units of 11-phenyl-11 H -benzo[ a ]carbazole ( PB[ a ]CZ ), 5-phenyl-5 H -benzo[ b ]carbazole ( PB[ b ]CZ ), 7-phenyl-7 H -benzo[ c ]carbazole ( PB[ c ]CZ ), 13-phenyl-13 H -naphtho[ a ]carbazole ( PN[ a ]CZ ), 5-phenyl-5 H -naphtho[ b ]carbazole ( PN[ b ]CZ ), and 9-phenyl-9 H -naphtho[ c ]carbazole ( PN[ c ]CZ ) are the candidates to construct D–A type molecules with BN and BPN , as illustrated in Fig.…”

Design of efficient non-doped blue emitters: toward the improvement of charge transport

“…8 It is also required to realize a simple-structured OLED to simplify the evaporation processes and reduce the costs. [9][10][11][12][13] To achieve a simple-structured device, we have to develop the multifunctional materials having good carrier transport and emission properties. Previously, Chang et al reported a series of carbazole-substituted anthracene derivatives for non-doped blue emission (9,10-bis [4-(9-ethyl-9H-carbazole-3-yl)phenyl]anthracene ¼ Cz3PhAn).…”