Novel iridium complexes with perfluorophenyl‐substituted phenylpyridine ligands have been developed. The Figure shows the photoluminescence (PL) spectra of four complexes in the doped films. By changing the position of substitution, the peaks in the PL spectra are tuned in the wavelength region 513–578 nm. Light‐emitting diodes using these complexes as the emitting material show an external quantum efficiency of 10–17 %.
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Tsuzuki et al. (2003) studied this question.
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