Effect of Water Vapor on the Operation and Stability of Tris(2,2‘-bipyridine)ruthenium(II)-Based Light-Emitting Electrochemical Cells

Citations Over TimeTop 11% of 2005 papers

Abstract

Light-emitting electrochemical cells (LECs) based on Ru(bpy)3(ClO4)2 are thin-film solid-state devices that typically operate at low applied voltages and show relatively high efficiencies. They suffer, however, from poor operating lifetimes. A proposed source of lifetime degradation is water in the film. Previous studies have revealed a marked difference in operation performance between cells fabricated and tested inside a drybox and those made and tested under ambient conditions. This study further characterized the effect of water vapor on device operation. The role of water as solvent within the thin-film devices was found to increase the current and the initial light output, but at the expense of more rapid decay in light generation.

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