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Relationship between the of exciplex emission and LUMO levels of the acceptors for devices with structure of ITO/-MTDATA ; the inset is the corresponding of exciplex emission vs current density.
Molecular structure (a) of acceptor, BCP and BPhe and donor, (-MTDATA and 2-TNATA) used for exciplex-type devices with structure of ITO/donor ; the external quantum efficiency of exciplex emission vs current density (b) by fixing the donor, the acceptors are BCP and BPhen, respectively, or by fixing the acceptor, the donors are, respectively, -MTDATA and 2-TNATA for comparison.
HOMO-LUMO of various acceptor materials, exciplex emission peaks, and , which are obtained from devices based on donor of -MTDATA. LUMO-HOMO data are cited from literatures (see Refs. 19–22).
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