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Red light from osmium complexes has been shown to occur with a peak radiance that exceeded 6000 cd m–2 at only 6 V. External quantum efficiencies that are of the order of 1 % have been achieved. The importance of ionic space charge effects in the mechanism of device operation is discussed here. The Figure shows the structure of the osmium complex.
Bernhard et al. (Mon,) studied this question.
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