Electroluminescent properties of yellow light-emitting electrochemical cells based on a cationic iridium complex and the effect of ionic liquids incorporation in an active layer

Luminescence properties of [Ir(C^N)2(N^N)]+ complexes: relations between DFT computation results and emission band-shape analysis data

“…In nice agreement with the literature data, [82][83][84][85][86][87][88][89] the presence of different C^N and N^N ligands in the [Ir(C^N) 2 (N^N)] + structures differentiates to some extent their UV-Vis absorption spectra. The effects, however, are relatively small as it can be clearly seen in the representative examples depicted in Fig.…”

“…À salts according to literature procedures. [82][83][84][85][86][87][88][89] The obtained reaction products were further puried by means of column chromatography on (silica gel with CH 2 Cl 2 as the eluent, changing next to acetone : CH 2 Cl 2 1 : 30 or 1 : 10 v/v). The…”

“…Some of these chelates have been already tested as potential materials for OLED devices and their luminescence were reported in the literature. [82][83][84][85][86][87][88][89] Whereas the [Ir(ppz) 2 (N^N)] + complexes [82][83][84][85][86] exhibit typically the MLCT emission, their [Ir(dfppz) 2 (N^N)] + counterparts [87][88][89] display, for some of the N^N ligands, the 3 *N^N ligand centred LC emission. From this point of view, one can regard the mentioned Ir 3+ chelates as particularly well designed model systems allowing testing the raised hypothesis for similar as well as different enough emitters.…”

Blue and Blue-Green Light-Emitting Cationic Iridium Complexes: Synthesis, Characterization, and Optoelectronic Properties

“…This LEC emitted yellow light and exhibited a peak brightness of 300 cdm –2 and a peak power efficiency exceeding 10 lm W 1– under 3 V . Soon after this a wide variety of iridium complexes were reported, thereby exploiting the large LFSEs of these complexes. ,,,,− The large LFSE of iridium complexes renders the dissociate e g orbitals less accessible compared to those of Ru­(II) complexes. These features enhance the photochemical stability and result in a high photoluminescent quantum yield (PLQY).…”