Construction of a high color-purity deep-blue emitter based on an indolo[3,2,1-<i>jk</i>]carbazole center using a crossed long-short axis (CLSA) molecular design strategy

A deep-blue material based on a crossed long-short axis strategy and a large conjugate core, which enables high-lying reverse intersystem crossing and achieves an efficiency of 7.46% at 420 nm with CIE coordinates meeting the BT.2020 standard.