Solution-processed UV light emitting diode based on butyltriphenylsilane modified phenanthro[9,10-d]imidazole with high efficiency†
Abstract
A new UV fluorescent material based on phenanthro[9,10-d]imidazole and butyltriphenylsilane (SiBPI) is designed and synthesized, which presents high quantum yield and excellent solubility. A non-doped solution-processed device using SiBPI as an active layer achieves an extremely high ηext of 1.76% with guaranteed saturated UV CIE coordinates of (0.158, 0.042).