A new electrode design for ambipolar injection in organic semiconductors

Organic semiconductors have attracted much attention for low-cost, flexible and human-friendly optoelectronics. However, achieving high electron-injection efficiency is difficult from air-stable electrodes and cannot be equivalent to that of holes. Here, we present a novel concept of electrode compo...

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Autores principales: Kanagasekaran, Thangavel, Shimotani, Hidekazu, Shimizu, Ryota, Hitosugi, Taro, Tanigaki, Katsumi
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2017
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5645469/
https://www.ncbi.nlm.nih.gov/pubmed/29042533
http://dx.doi.org/10.1038/s41467-017-01047-9
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author Kanagasekaran, Thangavel
Shimotani, Hidekazu
Shimizu, Ryota
Hitosugi, Taro
Tanigaki, Katsumi
author_facet Kanagasekaran, Thangavel
Shimotani, Hidekazu
Shimizu, Ryota
Hitosugi, Taro
Tanigaki, Katsumi
author_sort Kanagasekaran, Thangavel
collection PubMed
description Organic semiconductors have attracted much attention for low-cost, flexible and human-friendly optoelectronics. However, achieving high electron-injection efficiency is difficult from air-stable electrodes and cannot be equivalent to that of holes. Here, we present a novel concept of electrode composed of a bilayer of tetratetracontane (TTC) and polycrystalline organic semiconductors (pc-OSC) covered by a metal layer. Field-effect transistors of single-crystal organic semiconductors with the new electrodes of M/pc-OSC/TTC (M: Ca or Au) show both highly efficient electron and hole injection. Contact resistance for electron injection from Au/pc-OSC/TTC and hole injection from Ca/pc-OSC/TTC are comparable to those for electron injection from Ca and hole injection from Au, respectively. Furthermore, the highest field-effect mobilities of holes (22 cm(2) V(–1) s(–1)) and electrons (5.0 cm(2) V(–1) s(–1)) are observed in rubrene among field-effect transistors with electrodes so far proposed by employing Ca/pc-OSC/TTC and Au/pc-OSC/TTC electrodes for electron and hole injection, respectively.
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spelling pubmed-56454692017-10-19 A new electrode design for ambipolar injection in organic semiconductors Kanagasekaran, Thangavel Shimotani, Hidekazu Shimizu, Ryota Hitosugi, Taro Tanigaki, Katsumi Nat Commun Article Organic semiconductors have attracted much attention for low-cost, flexible and human-friendly optoelectronics. However, achieving high electron-injection efficiency is difficult from air-stable electrodes and cannot be equivalent to that of holes. Here, we present a novel concept of electrode composed of a bilayer of tetratetracontane (TTC) and polycrystalline organic semiconductors (pc-OSC) covered by a metal layer. Field-effect transistors of single-crystal organic semiconductors with the new electrodes of M/pc-OSC/TTC (M: Ca or Au) show both highly efficient electron and hole injection. Contact resistance for electron injection from Au/pc-OSC/TTC and hole injection from Ca/pc-OSC/TTC are comparable to those for electron injection from Ca and hole injection from Au, respectively. Furthermore, the highest field-effect mobilities of holes (22 cm(2) V(–1) s(–1)) and electrons (5.0 cm(2) V(–1) s(–1)) are observed in rubrene among field-effect transistors with electrodes so far proposed by employing Ca/pc-OSC/TTC and Au/pc-OSC/TTC electrodes for electron and hole injection, respectively. Nature Publishing Group UK 2017-10-17 /pmc/articles/PMC5645469/ /pubmed/29042533 http://dx.doi.org/10.1038/s41467-017-01047-9 Text en © The Author(s) 2017 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Kanagasekaran, Thangavel
Shimotani, Hidekazu
Shimizu, Ryota
Hitosugi, Taro
Tanigaki, Katsumi
A new electrode design for ambipolar injection in organic semiconductors
title A new electrode design for ambipolar injection in organic semiconductors
title_full A new electrode design for ambipolar injection in organic semiconductors
title_fullStr A new electrode design for ambipolar injection in organic semiconductors
title_full_unstemmed A new electrode design for ambipolar injection in organic semiconductors
title_short A new electrode design for ambipolar injection in organic semiconductors
title_sort new electrode design for ambipolar injection in organic semiconductors
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5645469/
https://www.ncbi.nlm.nih.gov/pubmed/29042533
http://dx.doi.org/10.1038/s41467-017-01047-9
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