Blue thermally activated delayed fluorescence molecule having acridane and cyanobenzene units

Hiroki Noda, Ryota Kabe, Chihaya Adachi

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Highly efficient blue thermally activated delayed fluorescence (TADF) materials consisting of 9,9-diphenylacridan and benzonitrile units were developed. We found that placing 9,9-diphenylacridan in the ortho-position of benzonitrile enhanced the TADF process compared with results from meta- and para-substituted derivatives. We observed blue TADF emission with a high photoluminescence quantum yield (80%) and a high reverse intersystem crossing rate constant (1.2 × 106 s-1) for 2,6-bis(9,9-diphenylacridan-10(9H)-yl)benzonitrile (o-A2CN). An organic light-emitting diode fabricated using o-A2CN as an emitter showed good blue emission (CIEx, CIEy = 0.16, 0.16) with high external electroluminescence quantum efficiency (15.9%).

Original languageEnglish
Pages (from-to)1463-1466
Number of pages4
JournalChemistry Letters
Issue number12
Publication statusPublished - Jan 1 2016


All Science Journal Classification (ASJC) codes

  • Chemistry(all)

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