A 2D Titanium Carbide MXene Flexible Electrode for High-Efficiency Light-Emitting Diodes.

Title A 2D Titanium Carbide MXene Flexible Electrode for High-Efficiency Light-Emitting Diodes.
Authors S. Ahn; T.H. Han; K. Maleski; J. Song; Y.H. Kim; M.H. Park; H. Zhou; S. Yoo; Y. Gogotsi; T.W. Lee
Journal Adv Mater
DOI 10.1002/adma.202000919
Abstract

Although several transparent conducting materials such as carbon nanotubes, graphene, and conducting polymers have been intensively explored as flexible electrodes in optoelectronic devices, their insufficient electrical conductivity, low work function, and complicated electrode fabrication processes have limited their practical use. Herein, a 2D titanium carbide (Ti C ) MXene film with transparent conducting electrode (TCE) properties, including high electrical conductivity (?11 670 S cm ) and high work function (?5.1 eV), which are achieved by combining a simple solution processing with modulation of surface composition, is described. A chemical neutralization strategy of a conducting-polymer hole-injection layer is used to prevent detrimental surface oxidation and resulting degradation of the electrode film. Use of the MXene electrode in an organic light-emitting diode leads to a current efficiency of ?102.0 cd A and an external quantum efficiency of ?28.5% ph/el, which agree well with the theoretical maximum values from optical simulations. The results demonstrate the strong potential of MXene as a solution-processable electrode in optoelectronic devices and provide a guideline for use of MXenes as TCEs in low-cost flexible optoelectronic devices.

Citation S. Ahn; T.H. Han; K. Maleski; J. Song; Y.H. Kim; M.H. Park; H. Zhou; S. Yoo; Y. Gogotsi; T.W. Lee.A 2D Titanium Carbide MXene Flexible Electrode for High-Efficiency Light-Emitting Diodes.. Adv Mater Weinheim. 2020:e2000919. doi:10.1002/adma.202000919

Related Elements

Titanium

See more Titanium products. Titanium (atomic symbol: Ti, atomic number: 22) is a Block D, Group 4, Period 4 element with an atomic weight of 47.867. The number of electrons in each of Titanium's shells is [2, 8, 10, 2] and its electron configuration is [Ar] 3d2 4s2. Titanium Bohr ModelThe titanium atom has a radius of 147 pm and a Van der Waals radius of 187 pm. Titanium was discovered by William Gregor in 1791 and first isolated by Jöns Jakob Berzelius in 1825. In its elemental form, titanium has a silvery grey-white metallic appearance. Titanium's properties are chemically and physically similar to zirconium, both of which have the same number of valence electrons and are in the same group in the periodic table. Elemental TitaniumTitanium has five naturally occurring isotopes: 46Ti through 50Ti, with 48Ti being the most abundant (73.8%). Titanium is found in igneous rocks and the sediments derived from them. It is named after the word Titanos, which is Greek for Titans.

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