TY - JOUR
T1 - Application of wide-energy-gap material 3,4-di(9H-carbazol-9-yl) benzonitrile in organic light-emitting diodes
AU - Tanaka, Yuya
AU - Takahashi, Takehiro
AU - Nishide, Junichi
AU - Hiraga, Yasuhide
AU - Nakanotani, Hajime
AU - Adachi, Chihaya
N1 - Funding Information:
YT thanks Mr. Takahiko Yamanaka for his kind cooperation in the experiments. This research was supported by the Center of Innovation (COI) Program from the Japan Science and Technology Agency (JST).
Publisher Copyright:
© 2016 Elsevier B.V.
PY - 2016/11/30
Y1 - 2016/11/30
N2 - 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 436 nm 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 (2.92 eV) and unexpected electron transport capability of 2CzBN.
AB - 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 436 nm 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 (2.92 eV) and unexpected electron transport capability of 2CzBN.
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U2 - 10.1016/j.tsf.2016.11.016
DO - 10.1016/j.tsf.2016.11.016
M3 - Article
AN - SCOPUS:84997795663
SN - 0040-6090
VL - 619
SP - 120
EP - 124
JO - Thin Solid Films
JF - Thin Solid Films
ER -