Transparent Light-Emitting Electrochemical Cells

摘要

Single layer light-emitting electrochemical cells (LECs) are amongst thesimplest electroluminescent devices and operate with air-stable electrodes.Transparent light-emitting devices are of great interest as they can enablenew applications in consumer electronics. In this work, a transparent ionictransition metal complex based LEC is fabricated by developing a transparenttop contact based on tin (IV) oxide (SnO_2) and indium-tin oxide, processedby low-temperature atomic layer deposition and pulsed laser deposition,respectively. The resulting devices present transparency in excess of 75 overthe full visible spectrum (380–750 nm), with 82 transmission at the emissionpeak (563 nm). The devices emit from the front and the rear with highluminance (260 cd m~(?2)) and long lifetime (176 h). These parameters placethem among the highest performing single layer transparent electroluminescentdevices.