Diphenylsilanes containing electronically isolated carbazolyl fragments as host materials for light emitting diodes

▶ Branched derivatives containing diphenylsilane core and pendent carbazolyl fragments were synthesized and characterized. ▶ The derivatives were tested as host materials in blue phosphorescent OLEDs. ▶ The best device demonstrated current efficiency of 16.4 cd/A and maximum brightness exceeding 200 cd/m2.