| 摘要 |
An OLED device comprises an anode, a cathode and therebetween a light emitting layer containing a compound represented by Formula I below: wherein: each A is independently selected from N and P; each E is independently selected from N, P, and As; each Z is a radical independently selected from each R is an independently selected substituent; and each R' is independently selected from H and a substituent; provided that two substituent groups can join to form a ring.
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