title: Improved Performance of Red Phosphorescent Organic Light Emitting Diodes Using Partial Mixed Host System.
abstract: Phosphorescent organic light-emitting diodes (PHOLEDs) have shown a heterojunction system that is a bulk heterojunctioned emitting layer (EML). In our work, we have demonstrated an improvement in efficiency with a partial mixed host system in an EML. A mixed host system, which is mixed with a host material and an electron transporting material, was used on the red PHOLEDs. In general, the recombination zone is located at the electron transporting layer (ETL) side in typical PHOLEDs due to excessive accumulation at the interface. However, this study proposed the removal of interfaces through the advantage of a mixed host system and a mixed layer between EML and ETL sides to increase the electron mobility of the experiments. Detailed optical and electrical analysis of these phenomena, were demonstrated.
authors.forename: Yong
authors.initials: Y
authors.lastname: Sun
authors.forename: Ho Won
authors.initials: HW
authors.lastname: Lee
authors.forename: Song Eun
authors.initials: SE
authors.lastname: Lee
authors.forename: Hyung Jin
authors.initials: HJ
authors.lastname: Yang
authors.forename: Han Kyu
authors.initials: HK
authors.lastname: Yoo
authors.forename: Kyo Min
authors.initials: KM
authors.lastname: Hwang
authors.forename: Chan Woo
authors.initials: CW
authors.lastname: Kim
authors.forename: Seung Soo
authors.initials: SS
authors.lastname: Yoon
authors.forename: Young Kwan
authors.initials: YK
authors.lastname: Kim