Study of All Solution Processed Exciplex Organic Light-Emitting Diode

Abstract

Organic light-emitting diodes (OLEDs) are widely used in full-color display panels, fluorescent tubes and solid-state lighting devices. In recent years, due to the material utilization yield of the vacuum deposition method is very low and maintaining a high vacuum further increases the fabrication cost and complexity, solution processing method has become a research hotspot. However, the development of solution-processed OLEDs has a great challenge in multilayer structure formation and nearly all prior reports on solution-processed OLEDs were utilizing a vacuum deposited electron-transport layer (ETL). Therefore, it is of great significance to further research on all solution-processed OLEDs whose ETL were spin-coated. In this paper, spin-coated ETL based OLED with high current efficiency that comparable with vacuum deposited ETL based OLED were successfully achieved.

Thermally Activated Delayed Fluorescence in Commercially Available Materials for Solution-Process Exciplex OLEDs

“…However, because of the high material consumption and high cost in the VTE method, a low-cost solution-processed deposition is a feasible and effective strategy to prepare high-performance TADF OLEDs. Commercially available 2,4,6-tris [3-(diphenylphosphinyl)phenyl]-1,3,5-triazine (POT2T) is a potential candidate as a acceptor in the solution-processed exciplex system because of its high solubility, easy gain, and suitable LUMO level [20][21][22][23]. Table 1 collects the solution-processed exciplex OLEDs based on POT2T combined with different donor materials.…”