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Low energy losses due to non‐radiative decay are an important step towards high‐efficiency organic LEDs. The rigid, regioregular structure of the novel ladder poly( p ‐phenylene)s reported here lead to a reduction in such losses and to potentially interesting internal LED efficiencies of 1%. The effect on the efficiency of varying the length of the spacers in the structure is examined.
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Grüner et al. (1994) studied this question.
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