Bifunctional oligofluorene-cored carbazole dendrimers as solution-processed blue emitters and hole transporters for electroluminescent devices

Effective blocking of the molecular aggregation of novel truxene-based emitters with spirobifluorene and electron-donating moieties for furnishing highly efficient non-doped blue-emitting OLEDs

“…Except for Tr4, all compounds show two major emission peaks in CH 2 Cl 2 solution, which can be assigned to the 0-0 and 0-1 singlet state transitions. 56 The shoulder emission peaks ca. 420 nm for Tr1 and 489 nm for Tr2 should come from the 0-2 transition.…”

Blue Light Emitting Polyphenylene Dendrimers with Bipolar Charge Transport Moieties

“…Dendrimer-based OLEDs have been investigated in the last two decades, due to their numerous advantages over small molecules and polymers, i.e., cost-effective solution processability, high performance reproducibility thanks to their well-defined structures, in contrast to polymers, and precise functionalization of dendrimers at multiple positions [9][10][11][12][13]. Dendrimers for OLEDs generally include two types: one designed for better charge transport (conjugated scaffold) [14][15][16][17][18][19] and one for surface-to-core energy transfers (non-conjugated scaffold) [20][21][22][23][24].…”

Role of LiTFSI in high Tgtriphenylamine-based hole transporting material in perovskite solar cell

“…Studied compound was synthesized from commercially available tris(4-bromophenyl)amine in three steps with an overall yield of 52%. 19 Cyclic voltammogram (CV) is measured to determine the oxidation and reduction potential of BT41. The later was then subjected to The maximum absorption appears similarly at 405 nm for the solution and 406 nm for the thin film, while the peak for the thin film is broader than that for the solution due to enhanced overlap between molecules, leading to splitting of HOMO and LUMO level.…”