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

doi:10.1117/12.2251640

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

^*Corresponding author for this work

Research Organization for Nano & Life Innovation

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

2 Citations (Scopus)

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 language	English
Title of host publication	Organic Photonic Materials and Devices XIX 2017
Publisher	SPIE
Volume	10101
ISBN (Electronic)	9781510606432
DOIs	https://doi.org/10.1117/12.2251640
Publication status	Published - 2017
Event	Organic Photonic Materials and Devices XIX 2017 - San Francisco, United States Duration: 2017 Jan 30 → 2017 Feb 1

Other

Other	Organic Photonic Materials and Devices XIX 2017
Country/Territory	United States
City	San Francisco
Period	17/1/30 → 17/2/1

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

Access to Document

10.1117/12.2251640

Cite this

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

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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 F{\"o}rster 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.",

keywords = "Energy transfer, Liquid organic semiconductor, Naphthalene-derivative, Wide-bandgap material",

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

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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

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.

KW - Energy transfer

KW - Liquid organic semiconductor

KW - Naphthalene-derivative

KW - Wide-bandgap material

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Y2 - 30 January 2017 through 1 February 2017

ER -

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

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