Deep-blue light emission with a wide-bandgap naphthalene-derivative liquid organic semiconductor host

Naofumi Kobayashi, Hiroyuki Kuwae, Juro Oshima, Ryoichi Ishimatsu, Shuya Tashiro, Toshihiko Imato, Chihaya Adachi, Shuichi Shoji, Jun Mizuno

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

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.

Original languageEnglish
Title of host publicationOrganic Photonic Materials and Devices XIX 2017
PublisherSPIE
Volume10101
ISBN (Electronic)9781510606432
DOIs
Publication statusPublished - 2017
EventOrganic Photonic Materials and Devices XIX 2017 - San Francisco, United States
Duration: 2017 Jan 302017 Feb 1

Other

OtherOrganic Photonic Materials and Devices XIX 2017
CountryUnited States
CitySan Francisco
Period17/1/3017/2/1

Fingerprint

Organic Semiconductors
Blue Light
Semiconducting organic compounds
Light emission
organic semiconductors
Naphthalene
naphthalene
light emission
Energy gap
Liquid
Derivatives
Derivative
Anthracene
Liquids
liquids
anthracene
Energy
Electroluminescence
Organic Light-emitting Diodes
organic liquids

Keywords

  • Energy transfer
  • Liquid organic semiconductor
  • Naphthalene-derivative
  • Wide-bandgap material

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

Cite this

Kobayashi, N., Kuwae, H., Oshima, J., Ishimatsu, R., Tashiro, S., Imato, T., ... Mizuno, J. (2017). Deep-blue light emission with a wide-bandgap naphthalene-derivative liquid organic semiconductor host. In Organic Photonic Materials and Devices XIX 2017 (Vol. 10101). [101011B] SPIE. https://doi.org/10.1117/12.2251640

Deep-blue light emission with a wide-bandgap naphthalene-derivative liquid organic semiconductor host. / Kobayashi, Naofumi; Kuwae, Hiroyuki; Oshima, Juro; Ishimatsu, Ryoichi; Tashiro, Shuya; Imato, Toshihiko; Adachi, Chihaya; Shoji, Shuichi; Mizuno, Jun.

Organic Photonic Materials and Devices XIX 2017. Vol. 10101 SPIE, 2017. 101011B.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Kobayashi, N, Kuwae, H, Oshima, J, Ishimatsu, R, Tashiro, S, Imato, T, Adachi, C, Shoji, S & Mizuno, J 2017, Deep-blue light emission with a wide-bandgap naphthalene-derivative liquid organic semiconductor host. in Organic Photonic Materials and Devices XIX 2017. vol. 10101, 101011B, SPIE, Organic Photonic Materials and Devices XIX 2017, San Francisco, United States, 17/1/30. https://doi.org/10.1117/12.2251640
Kobayashi N, Kuwae H, Oshima J, Ishimatsu R, Tashiro S, Imato T et al. Deep-blue light emission with a wide-bandgap naphthalene-derivative liquid organic semiconductor host. In Organic Photonic Materials and Devices XIX 2017. Vol. 10101. SPIE. 2017. 101011B https://doi.org/10.1117/12.2251640
Kobayashi, Naofumi ; Kuwae, Hiroyuki ; Oshima, Juro ; Ishimatsu, Ryoichi ; Tashiro, Shuya ; Imato, Toshihiko ; Adachi, Chihaya ; Shoji, Shuichi ; Mizuno, Jun. / Deep-blue light emission with a wide-bandgap naphthalene-derivative liquid organic semiconductor host. Organic Photonic Materials and Devices XIX 2017. Vol. 10101 SPIE, 2017.
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AU - Ishimatsu, Ryoichi

AU - Tashiro, Shuya

AU - Imato, Toshihiko

AU - Adachi, Chihaya

AU - Shoji, Shuichi

AU - Mizuno, Jun

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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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