Study of different electron transporting layer on electroluminescent properties of perovskite light emitting diodes

摘要

Organic-inorganic hybrid perovskites have been emerging as promising emitting materials for light-emitting diodes dueto their miraculous optoelectronic properties. Conventional electron transporting materials used in organic light emittingdiodes (OLEDs) such as 1,3,5-tris(2-N-phenylbenzimidazolyl) benzene (TPBi), 4,7-diphenyl-1,10-phenanthroline(Bphen), 1,3,5-tri(m-pyrid-3-yl-phenyl) benzene (TmPyPB), and 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline (BCP)have been used as electron transporting layer (ETL) in the perovskite light emitting diodes (PeLEDs). However, thereexit few systematic analysis about different ETL materials on the performance of PeLED. In this work, we employ TPBi,BPhen, TmPyPB, and BCP as ETL material of PeLED, respectively. Owing to the high electron mobility and suitableenergy level, BPhen PeLED express the best performance at the same thickness with a maximum luminance of 812 cd m~(-2) and current efficiency (CE) of 0.1 cd A~(-1). Hence, this work provides a useful method on device architectureconstruction for the realization of high performance PeLEDs.