Electroluminescent devices comprising diketopyrrolopyrroles
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United States of America Patent
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Jun 13, 2006
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app pub date -
Sep 8, 2000
filing date -
Sep 27, 1999
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Abstract
Electroluminescent device comprising in this order(a) an anode(b) a hole transporting layer(c) a light-emitting layer(d) optionally an electron transporting layer and(e) a cathode and a light-emitting substance, wherein the light-emitting substance is a diketopyrrolopyrrole represented by formula I or formula III ##STR00001## processes for the preparation of compounds I, its uses and compositions comprising the compounds I and/or III.
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