Unraveling non-radiative decay channels of exciplexes to construct efficient red emitters for organic light-emitting diodes.

14–16 As summarized above, a clear trend can be observed, that is, a sharp decrease in efficiency with the redshift of emission, which can be mainly ascribed to the exponentially increasing non-radiative energy loss as the energy gap gets smaller. 17 Therefore, the inhibition of such energy loss is imperative in realizing efficient red ex

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An increasing trend of Φ PL and a decreasing trend of k nr were observed from mPTZC : TPA-QP to mPTBC : SAF-2NP, as shown in Fig. 4B . mPTBC : TPA-QP, mPTZC : TPA-2NP and mPTZC : TPA-QP have large k nr s, and non-radiative decay is gradually reduced after introducing HBs (mPTBC : TPA-2NP) and the stiff acceptor (mPTZC : SAF-2NP). mPTBC : SAF-2NP possesses the smallest k nr .

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