COMPOSITION AND LIGHT EMITTING DEVICE USING THE SAME
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Jan 15, 2016
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Feb 3, 2015
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Provided is a composition useful for producing a light emitting device in which the driving voltage is low. In particular, a composition containing a phosphorescent compound of formula (1) and a phosphorescent compound of formula (2) is provided, wherein the variable groups are as defined in the specification.
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