POS5-1391
Efficient Hole Injection and Transport in Solution-Processed OLEDs via Thermally Cross-Linkable Poly(iminoarylene)
When and Where
Nov 30, -0001
00:00 - 00:00
Presenter(s)
Yu Kyeong Kim (Pusan National University)
Co-Author(s)
Abstract
A major difficulty in manufacturing OLED devices through a solution process is the preparation of multilayered thin films. If the lower layer becomes damaged by the solvent used in the process of forming the upper layer, then the device efficiency and lifetime would be reduced. Therefore, manufacturing OLED devices using the thermal crosslinking method will be an important solution because sufficient solvent resistance can be obtained only through heat treatment without using additives or light irradiation. The organic hole injection layer and transport layer are common layers and can be used in various displays such as OLED, Quantum dot LED, and perovskite LED. In this study, new HIL and HTL polymers with excellent hole transport ability and high solvent resistance were synthesized and their properties were analyzed. The synthesized polymer was able to appropriately control the HOMO energy levels of -5.14 eV and -5.30 eV, and as a poly(iminoarylene)-based polymer, it had excellent hole mobility. OLED devices using the synthesized new thermally cross-linked HIL showed better performance than the corresponding devices using Poly-(3,4 ethylenedioxythiophene) : poly(styrene sulfonate) (PEDOT:PSS). Additionally, Perovskite LED devices using the new thermally cross-linked HTL performed better than those using poly-TPD, balancing the charge injection of the LED and limiting Joule heating generation.
