Full-solution-processed Blue Organic Light Emitting Device Based On A Fluorescent 1,3,5-tristyrylbenzene Stilbenoid Small Molecule

摘要

A full-solution-processed blue organic light emitting diode display based on a small molecule built on a fluorescent stilbenoid core has been fabricated and characterized. The structure of the blue device is ITO/PEDOT:PSS/active layer/Al. The optical characterization of the 1,3,5-tristyrylbenzene endowed with alkoxy (-OC_6H_(13)) chain active layer reveals a change in the excited molecular level configuration due to the molecular packing in the thin film that gives as a result a large Stokes shift in the solid state. The electroluminescence in the deep-blue region of the single layer device corresponds well with the photoluminescence emission of the thin films (438 nm) and is independent of the applied voltage. Raman analysis confirms the stability of the compound through the fabrication process. From the Ⅰ-Ⅴ study, an effective hole mobility of 9.3 × 10~(-6) cm~2/V s for the active layer has been obtained.