TY - GEN
T1 - Deep-blue light emission with a wide-bandgap naphthalene-derivative liquid organic semiconductor host
AU - Kobayashi, Naofumi
AU - Kuwae, Hiroyuki
AU - Oshima, Juro
AU - Ishimatsu, Ryoichi
AU - Tashiro, Shuya
AU - Imato, Toshihiko
AU - Adachi, Chihaya
AU - Shoji, Shuichi
AU - Mizuno, Jun
N1 - Publisher Copyright:
© 2017 SPIE.
PY - 2017
Y1 - 2017
N2 - We developed a novel naphthalene-derivative to function as a wide-bandgap liquid organic semiconductor (LOS) host material for the limited range of liquid deep-blue light-emitting materials that have been developed to date. The naphthalene-derivative, 1-naphthaleneacetic acid 2-ethylhexyl ester (NLQ) was synthesized as a LOS, by introducing an ethylhexyl group into naphthalene. 9,10-Diphenyl anthracene (DPA) was doped into NLQ as a guest deep-blue dye. From the absorption spectrum, the bandgap energy of NLQ was estimated to be 4.13 eV, indicating that NLQ has the widest bandgap energy of any such host material so far as we know. Deep-blue electroluminescence (EL) emission in a liquid state was obtained by doping DPA into NLQ. Light emission could be achieved by a combination of Förster resonance energy transfer and direct recombination of trapped holes and electrons because the bandgap energy of DPA is straddle by that of the wide-bandgap NLQ. Thus, NLQ is shown to be a promising wide-bandgap LOS host material, which allows deep-blue light emission and may have applications in liquid organic light-emitting diodes.
AB - We developed a novel naphthalene-derivative to function as a wide-bandgap liquid organic semiconductor (LOS) host material for the limited range of liquid deep-blue light-emitting materials that have been developed to date. The naphthalene-derivative, 1-naphthaleneacetic acid 2-ethylhexyl ester (NLQ) was synthesized as a LOS, by introducing an ethylhexyl group into naphthalene. 9,10-Diphenyl anthracene (DPA) was doped into NLQ as a guest deep-blue dye. From the absorption spectrum, the bandgap energy of NLQ was estimated to be 4.13 eV, indicating that NLQ has the widest bandgap energy of any such host material so far as we know. Deep-blue electroluminescence (EL) emission in a liquid state was obtained by doping DPA into NLQ. Light emission could be achieved by a combination of Förster resonance energy transfer and direct recombination of trapped holes and electrons because the bandgap energy of DPA is straddle by that of the wide-bandgap NLQ. Thus, NLQ is shown to be a promising wide-bandgap LOS host material, which allows deep-blue light emission and may have applications in liquid organic light-emitting diodes.
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U2 - 10.1117/12.2251640
DO - 10.1117/12.2251640
M3 - Conference contribution
AN - SCOPUS:85019405895
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - Organic Photonic Materials and Devices XIX 2017
A2 - Kajzar, Francois
A2 - Kaino, Toshikuni
A2 - Tabor, Christopher E.
A2 - Koike, Yasuhiro
PB - SPIE
T2 - Organic Photonic Materials and Devices XIX 2017
Y2 - 30 January 2017 through 1 February 2017
ER -