Optimization of Polymer Blue-Light-Emitting Devices by Introducing a Hole-Injection Layer Doped with the Molecular Nanomagnet [Mn12O12(H2O)4(C6F5COO)16]


  • We thank Dr. Spreitzer and Dr. Becker from Merck OLED materials GmbH, Dr. Jonas from HC Starck, and Philips Research for the donation of the light-emitting polymer, the PEDOT:PSS dispersion, and structured ITO substrates, respectively. This work has been supported by the European Union (QUEMOLNA and MAGMANET networks), the Spanish Ministry of Education and Science (MAT2004-03849), and the Generalitat Valenciana. H.B. acknowledges the support of the Program “Ramon y Cajal” of the Spanish Ministry of Education and Science.


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The performance of a blue-light-emitting polymer (LEP) device is improved by introducing a novel soluble hybrid hole-injection layer based on a polyarylamine (pTPD) doped with a large inorganic magnetic cluster (Mn12) used as oxidant. The efficiency of the devices at different luminances changes dramatically as the Mn12/pTPD ratio is increased from 0.005 to 0.05 (see figure).