ELECTROLUMINESCENT DEVICE

摘要

The invention relates to an electroluminescent device. The luminescent device comprises an active electroluminescent medium in a liquid phase acting as a charge transport medium. The device (10) includes electrodes (12, 14) and an active liquid layer (16) sandwiched there between. The active layer is a one-percent by-weight solution of poly (9,9-dioctyl fluorene) (PFO) in toluene. In this solution-phase electroluminescent device the solvent plays no part in the charge, transport process (other than as a host for the dissolved polymer). Emission arises from direct bipolar carrier injection from the electrodes into the carrier bands of the dissolved polymer. The invention further provides a method of analysing a sample using electro-luminescence.