Solution-processed niobium diselenide as conductor and anode for polymer light-emitting diodes

Abstract

The use of layered transition metal dichalcogenides (LTMDCs) processed from aqueous solution as hole injectors in polymer light-emitting diodes (PLEDs) was recently reported. In this letter, we extend the use of LTMDCs further by using the metallic compounds as semitransparent anodes in PLEDs (in place of indium tin oxide). The LTMDC films have a sheet resistance of ∼1000 Ω/□, and a transmittance of greater than 60% over the range of 400–800 nm. Typical diodes with niobium diselenide anodes show high luminance and power efficiencies of over 1 lm/W, demonstrating the potential to integrate solution-processed LTMDC conducting films in other electronic applications.