New Cross-Linkable Hole Transporting Materials for Perovskite LEDs

S. Kang, S. Park, J. Park
Kyung Hee University,

Keywords: LED, OLED, luminescence, display


In conventional organic light emitting diode (OLED) as well as perovskite light emitting diode (pLED) device, polyvinyl carbazole (PVK) and Poly-TPD have been widely used as a hole transporting layer (HTL) in the past. However, PVK and Poly-TPD have disadvantage in terms of soluble property limitation during stacked-soluble process device preparation. Therefore, we synthesized new cross-linkable HTL polymer, SMPF-DNPB for pLED device. It has non-soluble property to general solvent after thermal treatment and curing process. It includes phenyl naphtyl group, spirofluorene, and vinyl group. The device configuration is ITO/PEDOT:PSS-PSS:Na/ SMPF-DNPB or others/2D perovskite/TOPO/TPBi/LiF/Al. When new HTL materials were used, it showed high luminance efficiency of more than 10 Cd/A in green pLED device.