COMPOUND, COMPOSITION AND ORGANIC LIGHT-EMITTING DEVICE
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United States of America Patent
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Sep 25, 2015
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Sep 25, 2014
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Abstract
A compound of formula (I) wherein: X is0, S, NR11, CR11 2or SiR11 2wherein R11 in each occurrence is independently a substituent; R1is a substituent; R2, R3, and R4are each independently H or a substituent;R5and R6independently in each occurrence is a substituent;m independently in each occurrence is 0, 1 or 2; and n independently in each occurrence is 0, 1, 2, 3 or 4. The compound may be used as a host for a phosphorescent light-emitting material in an organic light-emitting device.
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