Details

Autor(en) / Beteiligte

• Tanaka, Yuya
• Takahashi, Takehiro
• Nishide, Junichi
• Hiraga, Yasuhide
• Nakanotani, Hajime
• Adachi, Chihaya

Titel

Application of wide-energy-gap material 3,4-di(9H-carbazol-9-yl) benzonitrile in organic light-emitting diodes

Ist Teil von

• Thin solid films, 2016-11, Vol.619, p.120-124

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2016

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• A material with a wide energy gap, 3,4-di(9H-carbazol-9-yl)benzonitrile (2CzBN), was synthesized and applied in organic light-emitting diodes (OLEDs). Pure blue electroluminescence with a peak wavelength of 436nm and Commission Internationale de l'Èclairage (CIE) coordinate of (0.160, 0.084) were obtained for an OLED containing 2CzBN as an emitter, although its external emission efficiency was limited to around 1% because of the lack of thermally activated delayed fluorescence (TADF) activity. In contrast, a highly efficient TADF-based OLED was obtained when 2CzBN was used as a host instead of an emitter by taking advantage of the high triplet energy (2.92eV) and unexpected electron transport capability of 2CzBN. •3,4-di(9H-carbazol-9-yl)benzonitrile (2CzBN) was used as host in organic light emitting diodes.•A highly efficient TADF-based OLED was obtained when 2CzBN was used as host.•High triplet energy (2.92eV) and unexpected electron transport capability of 2CzBN were confirmed.