High efficiency green phosphorescent organic light-emitting diodes with a low roll-off at high brightness

Carbazole-based polymers as hosts for solution-processed organic light-emitting diodes: Simplicity, efficacy

“…Notably, P85 bears the hole-transport material 9,9 0 -(1,3-phenylene)bis-9H-carbazole (mCP). mCP is a common host for blue phosphors characterized by a high E T (2.90 eV) and a very deep HOMO level [179]. This is also this polymer that furnished the best devices of this study.…”

Improved hole injection for blue phosphorescent organic light-emitting diodes using solution deposited tin oxide nano-particles decorated ITO anodes

“…Using mCP:TPBi with a 1:2 ratio at the right side of the EML significantly improved the electron mobility, as has also been observed in white PHOLEDs 54 . TPBi is a well known n-type electron transporting material and has also been used as an n-type host material 59,60 . In such a structure without NPs (device E), due to rapid electron injection into p-/n- mixed host, the current density and luminance is again improved, but the quantum efficiency is almost unchanged, this time due to the increased density of electrons.…”

Organic Semiconductor Electroluminescent Materials

“…They reported the first practical molecular n-type dopant W 2 (hpp) 4 [77][78][79], which could be doped into ETL material 2,4,7,9-tetraphenyl-1,10-phenanthroline (TPPhen; Fig. 6.5).…”