In 2019,Journal of Chemical Physics included an article by Sanderson, Stephen; Philippa, Bronson; Vamvounis, George; Burn, Paul L.; White, Ronald D.. Application In Synthesis of fac-Tris(2-phenylpyridine)iridium. The article was titled 《Understanding charge transport in Ir(ppy)3:CBP OLED films》. The information in the text is summarized as follows:
Ir(ppy)3:CBP blends have been widely studied as the emissive layer in organic light emitting diodes (OLEDs), yet crucial questions about charge transport within the layer remain unaddressed. Recent mol. dynamics simulations show that the Ir(ppy)3 mols. are not isolated from each other, but at concentrations of as low as 5 weight % can be part of connected pathways. Such connectivity raises the question of how the iridium(III) complexes contribute to long-range charge transport in the blend. We implement a kinetic Monte Carlo transport model to probe the guest concentration dependence of charge mobility and show that distinct min. appear at approx. 10 weight % Ir(ppy)3 due to an increased number of trap states that can include interconnected complexes within the blend film. The depth of the min. is shown to be dependent on the elec. field and to vary between electrons and holes due to their different trapping depths arising from the different ionization potentials and electron affinities of the guest and host mols. Typical guest-host OLEDs use a guest concentration below 10 weight % to avoid triplet-triplet annihilation, so these results suggest that optimal device performance is achieved when there is significant charge trapping on the iridium(III) complex guest mols. and min. interactions of the emissive chromophores that can lead to triplet-triplet annihilation. (c) 2019 American Institute of Physics. In addition to this study using fac-Tris(2-phenylpyridine)iridium, there are many other studies that have used fac-Tris(2-phenylpyridine)iridium(cas: 94928-86-6Application In Synthesis of fac-Tris(2-phenylpyridine)iridium) was used in this study.
fac-Tris(2-phenylpyridine)iridium(cas: 94928-86-6) belongs to pyridine. Pyridines are often used as catalysts or reagents; particular notice has been paid recently to how pyridine coordinates to metal centers enabling a wide range of valuable reactions. Application In Synthesis of fac-Tris(2-phenylpyridine)iridium