| 摘要 |
A composition comprises an organic semiconducting material and a triplet-accepting material of formula (I) having a triplet energy level lower than that of the organic semiconducting material. Each Ar represents an optionally-substituted aryl or heteroaryl group, n is 1-3, m is 1-5, q is 0-1, and R3 and R4 independently represent hydrogen or a substituent. R3 with adjacent (Ar)n and/or R4 with adjacent (Ar)m may be linked by a direct bond or a divalent group, subject to provisos. The semiconducting material may be a fluorescent light-emitting material, a hole- or electron-transporting material, or a hole- or electron-blocking material and is preferably a polymer with amine repeat units. An organic light-emitting device is also disclosed, which comprises an anode and a cathode between which is a light-emitting layer and optional charge-transporting and/or charge-blocking layers, wherein at least one layer comprises the composition. Other compositions, compounds, polymers, and preparative methods are claimed.
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