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The optical constants of emitter and electrode materials in polymer light-emitting diodes

2003; Institute of Physics; Volume: 36; Issue: 4 Linguagem: Inglês

10.1088/0022-3727/36/4/101

1361-6463

Catherine Ramsdale, Neil C. Greenham,

Molecular Junctions and Nanostructures

The optical constants of spun-cast films of several polyfluorene derivatives were examined using a combination of reflection and transmission spectroscopic ellipsometry. Results for both unannealed films and films annealed at 150°C are presented. For some polymers, annealing allowed the polymer chains to re-organize such that the films became more isotropic. The optical constants of two common metal cathodes, calcium and aluminium, were investigated using reverse ellipsometry. Multi-layer structures incorporating both polymer and metal layers were also successfully modelled.