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Abstract Carbene metal amides are a new class of highly efficient light‐emitting molecules based on a linear donor–metal–acceptor geometry. Here the synthesis, structure, and photo‐ and electroluminescence of carbene silver carbazolato complexes, ( Ad L)Ag(Cz) Ad L = adamantyl‐substituted cyclic (alkyl)(amino)carbene; Cz = carbazolate ( 1 ) and 3,6‐ t Bu 2 Cz ( 2 ), are reported. They display green emission with photoluminescence quantum yields of up to 74%. Efficient mixing of triplet and singlet excited states is observed, with sub‐microsecond thermally activated radiative triplet lifetimes. These complexes provide prototype organic light‐emitting diodes based exclusively on silver emitters, with external quantum efficiencies of up to 14%.
Romanov et al. (Tue,) studied this question.