Efficient near-ultraviolet (NUV) electroluminescence based on a benzonitrile acceptor HLCT material with balanced carrier mobilities and high color purity.

ABSTRACT: Balanced carrier injection/transport and high color purity are critical for highly efficient near-ultraviolet (NUV) electroluminescence (EL) emitters. Herein, two novel structurally simple NUV donor-π-acceptor (D-π-A) molecules, namely CZ-PPCN and TPA-PPCN, with a benzene π-bridge containing carbazole/triphenylamine as donors and benzonitrile as the acceptor were designed and synthesized, and they exhibited hybrid local charge transfer (HLCT) characteristics. The introduction of the benzonitrile group of the CZ-PPCN molecule not only enhances charge carrier injection but also promotes hole and electron mobility balance through the formation of supramolecular hydrogen bonds (both up to 10^-5 cm² V^-1 s^-1). The non-doped and doped devices fabricated

SUBMITTER: Zhang L 

PROVIDER: S-EPMC12268602 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature