TITLE

Multiwalled carbon nanotube sheets as transparent electrodes in high brightness organic light-emitting diodes

AUTHOR(S)
Williams, Christopher D.; Robles, Raquel Ovalle; Zhang, Mei; Li, Sergey; Baughman, Ray H.; Zakhidov, Anvar A.
PUB. DATE
November 2008
SOURCE
Applied Physics Letters;11/3/2008, Vol. 93 Issue 18, p183506
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We have fabricated efficient organic light emitting diodes using strong, transparent carbon nanotube (CNT) sheets as the hole-injecting anode. These devices show a brightness of 4500 cd/m2 and current efficiency near 2.5 cd/A, which is close to the efficiency we achieve with a similar device, which uses indium tin oxide (ITO) as the anode. We demonstrate that proper planarization of the electrode using the water-soluble polymer poly(3,4-ethylenedioxythiophene) poly(styrenesulfonate) is necessary for achieving high efficiency and can be accomplished by spin casting multiple layers. We believe that increased conductivity of the sheets could lead to CNT-based devices with efficiencies exceeding those on ITO.
ACCESSION #
35279201

 

Related Articles

  • Fully bendable polymer light emitting devices with carbon nanotubes as cathode and anode. Yu, Zhibin; Hu, Liangbing; Liu, Zhitian; Sun, Mingliang; Wang, Meiliang; Grüner, George; Pei, Qibing // Applied Physics Letters;11/16/2009, Vol. 95 Issue 20, p203304 

    Polymer light emitting devices were fabricated by roll lamination using single-walled carbon nanotubes as both anode and cathode. The devices exhibited a low turn-on voltage of 3.8 V, high brightness of 1400 cd/m2 at 10 V and maximum efficiency of 2.2 cd/A at 480 cd/m2. The devices are also...

  • Inverted top-emitting organic light-emitting diodes using sputter-deposited anodes. Dobbertin, T.; Kroeger, M.; Heithecker, D.; Schneider, D.; Metzdorf, D.; Neuner, H.; Becker, E.; Johannes, H.-H.; Kowalsky, W. // Applied Physics Letters;1/13/2003, Vol. 82 Issue 2, p284 

    We demonstrate vacuum-sublimed topside-emitting inverted organic light-emitting diodes (IOLEDs) employing low-power radio-frequency magnetron sputter-deposited indium tin oxide (ITO) anodes. The device introduces a two-step sputtering sequence to reduce damage incurred by the sputtering process,...

  • Improved characteristics of organic light-emitting devices by surface modification of nickel-doped indium tin oxide anode. Ching-Ming Hsu; Wen-Tuan Wu // Applied Physics Letters;8/2/2004, Vol. 85 Issue 5, p840 

    This letter presents the optoelectrical performance of an organic light-emitting diode (OLED) through the elevation of indium tin oxide (ITO) anode work function by Ni co-sputter surface doping and additional O2 plasma treatment. The turn-on voltage of OLED devices can be reduced by 2.3 V for Ni...

  • Enhancement of hole injection using iridium-oxide-coated indium tin oxide anodes in organic light-emitting diodes. Soo Young Kim; Jong-Lam Lee; Ki-Beom Kim; Yoon-Heung Tak // Applied Physics Letters;3/28/2005, Vol. 86 Issue 13, p133504 

    We report the enhancement of hole injection using an IrOx layer between indium tin oxide anodes and 4,4’-bis[N-(1-naphtyl)-N-phenyl-amino]biphenyl in organic light-emitting diodes (OLEDs). The turn-on voltage of OLEDs decreased from 7 V to 4 V and the maximum luminescence value increased...

  • High-efficiency monochrome organic light emitting diodes employing enhanced microcavities. Meerheim, Rico; Nitsche, Robert; Leo, Karl // Applied Physics Letters;7/28/2008, Vol. 93 Issue 4, p043310 

    We demonstrate enhanced light outcoupling from bottom emitting monochrome high-efficiency red, green, and blue organic light emitting diodes by adding silver layers on the indium tin oxide (ITO) anode. The devices contain the phosphorescent emitting dyes tris(2-phenylpyridine)iridium and...

  • Interface state and dipole assisted hole injection improvement with 1,4,5,8,-naphthalene-tetracarboxylic-dianhydride in organic light-emitting devices. Pyungeun Jeon; Hyunbok Lee; Jeihyun Lee; Kwangho Jeong; JinWoo Lee; Yeonjin Yi // Applied Physics Letters;8/15/2011, Vol. 99 Issue 7, p073305 

    1,4,5,8-naphthalene-tetracarboxylic-dianhydride (NTCDA) is known to improve hole injection when inserted between the hole transport layer and the indium tin oxide (ITO) anode in organic light emitting devices. To clarify the origin of the improvement, the interfacial electronic structures...

  • Highly efficient simplified organic light emitting diodes. Meyer, J.; Hamwi, S.; Bülow, T.; Johannes, H.-H.; Riedl, T.; Kowalsky, W. // Applied Physics Letters;9/10/2007, Vol. 91 Issue 11, p113506 

    The authors report on highly efficient organic light emitting diodes (OLEDs) consisting of only two organic layers. The key to the simplification is the direct injection of holes into the wide band gap hole transport material 4,4′,4″-tris(N-carbazolyl)-triphenyl amine (highest...

  • Graphene as anode electrode for colloidal quantum dots based light emitting diodes. Klekachev, Alexander V.; Kuznetsov, Sergey N.; Asselberghs, Inge; Cantoro, Mirco; Hun Mun, Jeong; Jin Cho, Byung; Stesmans, André L.; Heyns, Marc M.; De Gendt, Stefan // Applied Physics Letters;7/22/2013, Vol. 103 Issue 4, p043124 

    Graphene films demonstrating low sheet resistance and high transparency in the visible light range are promising to be used as electrodes for light-emitting applications. In this work, we report the implementation of single layer graphene as hole injecting electrode for CdSe/ZnS quantum...

  • Anode material based on SWCNT for infrared quantum dot light-emitting devices. Farghal, Ahmed; Wageh, S.; Abou El-Azm, Atef // Optical & Quantum Electronics;Mar2010, Vol. 42 Issue 4, p263 

    We present an optical model based on Green's function to investigate the effect of using single-wall carbon nanotube (SWCNT) as anode for infrared quantum dot light-emitting devices (IR QD-LEDs). To the best of our knowledge, there is no report in using SWCNT as anode in IR QD-LEDs. We have...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics