Abstract
Electrodeposition is a versatile method for the preparation of ZnO films with controlled nanostructures and properties. In the present paper we describe two approaches for the preparation of ZnO hybrid films with red/green adjustable luminescence. ZnO is imparted with luminescence properties by bipyridine (dcbpy)- lanthanide complexes. In the first route, ZnO/ dcbpy hybrid films are prepared and subsequently chelated with Ln3+ ions (with Ln being Eu or Tb) to form the luminescent complex. In the second proposed route, highly porous ZnO matrices are prepared by electrodeposition with help of eosin Y molecules. The matrices are loaded with in- situ assembled Ln3+:dcbpy luminescent complexes. In both cases, the ligand is anchored to ZnO by its carboxylic acid groups. The film emission and excitation characteristics show UV absorption by the ligand bipyridine group and an efficient energy transfer to Ln3+.
Published Version
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