title: Effect of Poly-TPD Molecular Weight on the Characteristics of Quantum-Dot Light-Emitting Devices.
abstract: We have investigated the effect of poly-TPD molecular weight (Mw) on the characteristics of CdSe/ZnS quantum-dot light-emitting devices (QD-LEDs). The poly-TPDs with Mw = 24000 and 84000 were used for hole-transporting layer. The Mw = 24000 poly-TPD layer was seriously dissolved by toluene which was used for the dispersion of QDs, resulting in substantial thickness reduction during the spin-coating of QD layer. The emission, external quantum efficiency, and driving characteristics of the QD-LEDs were investigated. A maximum external quantum efficiency of 2.1% was obtained in the QD-LED with Mw = 84000 poly-TPD layer.
authors.forename: Min-Ji
authors.initials: MJ
authors.lastname: Jo
authors.forename: Dae-Gyu
authors.initials: DG
authors.lastname: Moon