Reduced graphene oxide/single-walled carbon nanotube hybrid films using various p-type dopants and their application to gan-based light-emitting diodes

Byeong Ryong Lee; Tae Geun Kim

doi:10.1166/jnn.2017.12453

Reduced graphene oxide/single-walled carbon nanotube hybrid films using various p-type dopants and their application to gan-based light-emitting diodes

Byeong Ryong Lee, Tae Geun Kim

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

This article reports the electrical and optical properties of the reduced graphene oxide (RGO)/single-walled carbon nanotube (SWCNT) films using various p-type dopants and their application to GaN-based light-emitting diodes. To enhance the current injection and spreading of the RGO/SWCNT films on the light-emitting diodes (LEDs), we increased the work function (Φ) of the films using chemical doping with AuCl₃, poly(3,4-ethylenedioxythiophene) oxidized with poly(4-styrenesulfonate) (PEDOT:PSS) and MoO₃; thereby reduced the Schottky barrier height between the RGO/SWCNT films and p-GaN. By comparison, LEDs fabricated with work-function-tuned RGO/SWCNT film doped with MoO₃ exhibited the decrease of the forward voltage from 5.3 V to 5.02 V at 20 mA and the increase of the output power up to 1.26 times. We also analyzed the current injection mechanism using ultraviolet photoelectron spectroscopy and X-ray photoelectron spectroscopy.

Original language	English
Pages (from-to)	454-459
Number of pages	6
Journal	Journal of Nanoscience and Nanotechnology
Volume	17
Issue number	1
DOIs	https://doi.org/10.1166/jnn.2017.12453
Publication status	Published - 2017

Bibliographical note

Funding Information:
This work was supported by a National Research Foundation of Korea grant funded by the Korean Government (MEST) under grant number 2011-0028769, Korea.

Publisher Copyright:
Copyright © 2017 American Scientific Publishers All rights reserved.

Keywords

GaN
Light-emitting diodes
Reduced graphene oxide
Single-walled carbon nanotube

ASJC Scopus subject areas

Bioengineering
General Chemistry
Biomedical Engineering
General Materials Science
Condensed Matter Physics

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10.1166/jnn.2017.12453

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title = "Reduced graphene oxide/single-walled carbon nanotube hybrid films using various p-type dopants and their application to gan-based light-emitting diodes",

abstract = "This article reports the electrical and optical properties of the reduced graphene oxide (RGO)/single-walled carbon nanotube (SWCNT) films using various p-type dopants and their application to GaN-based light-emitting diodes. To enhance the current injection and spreading of the RGO/SWCNT films on the light-emitting diodes (LEDs), we increased the work function (Φ) of the films using chemical doping with AuCl3, poly(3,4-ethylenedioxythiophene) oxidized with poly(4-styrenesulfonate) (PEDOT:PSS) and MoO3; thereby reduced the Schottky barrier height between the RGO/SWCNT films and p-GaN. By comparison, LEDs fabricated with work-function-tuned RGO/SWCNT film doped with MoO3 exhibited the decrease of the forward voltage from 5.3 V to 5.02 V at 20 mA and the increase of the output power up to 1.26 times. We also analyzed the current injection mechanism using ultraviolet photoelectron spectroscopy and X-ray photoelectron spectroscopy.",

keywords = "GaN, Light-emitting diodes, Reduced graphene oxide, Single-walled carbon nanotube",

author = "Lee, {Byeong Ryong} and Kim, {Tae Geun}",

note = "Funding Information: This work was supported by a National Research Foundation of Korea grant funded by the Korean Government (MEST) under grant number 2011-0028769, Korea. Publisher Copyright: Copyright {\textcopyright} 2017 American Scientific Publishers All rights reserved.",

year = "2017",

doi = "10.1166/jnn.2017.12453",

language = "English",

volume = "17",

pages = "454--459",

journal = "Journal of Nanoscience and Nanotechnology",

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AU - Lee, Byeong Ryong

AU - Kim, Tae Geun

N1 - Funding Information: This work was supported by a National Research Foundation of Korea grant funded by the Korean Government (MEST) under grant number 2011-0028769, Korea. Publisher Copyright: Copyright © 2017 American Scientific Publishers All rights reserved.

PY - 2017

Y1 - 2017

N2 - This article reports the electrical and optical properties of the reduced graphene oxide (RGO)/single-walled carbon nanotube (SWCNT) films using various p-type dopants and their application to GaN-based light-emitting diodes. To enhance the current injection and spreading of the RGO/SWCNT films on the light-emitting diodes (LEDs), we increased the work function (Φ) of the films using chemical doping with AuCl3, poly(3,4-ethylenedioxythiophene) oxidized with poly(4-styrenesulfonate) (PEDOT:PSS) and MoO3; thereby reduced the Schottky barrier height between the RGO/SWCNT films and p-GaN. By comparison, LEDs fabricated with work-function-tuned RGO/SWCNT film doped with MoO3 exhibited the decrease of the forward voltage from 5.3 V to 5.02 V at 20 mA and the increase of the output power up to 1.26 times. We also analyzed the current injection mechanism using ultraviolet photoelectron spectroscopy and X-ray photoelectron spectroscopy.

AB - This article reports the electrical and optical properties of the reduced graphene oxide (RGO)/single-walled carbon nanotube (SWCNT) films using various p-type dopants and their application to GaN-based light-emitting diodes. To enhance the current injection and spreading of the RGO/SWCNT films on the light-emitting diodes (LEDs), we increased the work function (Φ) of the films using chemical doping with AuCl3, poly(3,4-ethylenedioxythiophene) oxidized with poly(4-styrenesulfonate) (PEDOT:PSS) and MoO3; thereby reduced the Schottky barrier height between the RGO/SWCNT films and p-GaN. By comparison, LEDs fabricated with work-function-tuned RGO/SWCNT film doped with MoO3 exhibited the decrease of the forward voltage from 5.3 V to 5.02 V at 20 mA and the increase of the output power up to 1.26 times. We also analyzed the current injection mechanism using ultraviolet photoelectron spectroscopy and X-ray photoelectron spectroscopy.

KW - GaN

KW - Light-emitting diodes

KW - Reduced graphene oxide

KW - Single-walled carbon nanotube

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JO - Journal of Nanoscience and Nanotechnology

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Reduced graphene oxide/single-walled carbon nanotube hybrid films using various p-type dopants and their application to gan-based light-emitting diodes

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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