Homoleptic tris-cyclometalated iridium complexes with 2-phenylbenzothiazole ligands for highly efficient orange OLEDs

Os(II) Based Green to Red Phosphors: A Great Prospect for Solution‐Processed, Highly Efficient Organic Light‐Emitting Diodes

“…First of all, the radiative decay rate constants are derived to be ∼10 5 s −1 for 1 – 4 , ascertaining their phosphorescent origin. The sulfur atom of the thiazolyl groups tends to possess the greater polarizability,13 so that all thiazolyl Os(II) complexes 1 – 3 have showed much red‐shifted absorption compared with their pyridyl counterparts 12. b] On the other hand, the trivalent nitrogen atom of the imidazolyl groups possess higher electron density and less polarizability, which then induces the blue‐shift of both absorption and emission spectra of complex 4 .…”

Luminescent Neutral Platinum Complexes Bearing an Asymmetric N^N^N Ligand for High‐Performance Solution‐Processed OLEDs

“…Interestingly, while there are several reports on highly efficient iridium(III)‐based light‐emitting devices,7 the number of the platinum(II)‐based counterparts is rather low, and only few showed comparable performances with the former ones 8. Amongst the possible ligands coordinated to the platinum ion, relevant role is played by the symmetric and asymmetric tridentate systems 9.…”

Recent progress in upconversion luminescence nanomaterials for biomedical applications

“…In addition, the energy level of 3 A * of the acceptor should be lower than that of 3 T * of the sensitizer. Based on these considerations, metal complexes, such as ruthenium (II), 29,[51][52][53] iridium (III), [54][55][56] and platinum (II), 57,58 complexes with long-lived 3 T * states, are normally selected as the sensitizer, and organic -conjugation molecules are used as the annihilator. ISC: intersystem crossing; TTET: triplet-triplet energy transfer; 1 S * , 3 T * , 1 A * , and 3 A * : singlet and triplet excitation states of the sensitizer and the annihilator.…”