Bulletin of the American Physical Society
APS March Meeting 2018
Volume 63, Number 1
Monday–Friday, March 5–9, 2018; Los Angeles, California
Session B17: Organic Film Structure, Properties, and Dynamics
11:15 AM–2:03 PM,
Monday, March 5, 2018
LACC
Room: 306A
Sponsoring
Unit:
DMP
Chair: Mina Yoon, Oak Ridge National Laboratory
Abstract ID: BAPS.2018.MAR.B17.10
Abstract: B17.00010 : A new electrode design for ambipolar carrier injection in organic semiconductors and its applications to light emitting diodes*
1:27 PM–1:39 PM
Presenter:
Kasumi Tanigaki
(Tohoku Univ)
Authors:
Kasumi Tanigaki
(Tohoku Univ)
Thangavel Kanagasekaran
(Tohoku Univ)
Hidekazu Shimotani
(Tohoku Univ)
Ryota Shimizu
(Chemistry, Tokyo Institue of Technology)
Taro Hitosugi
(Chemistry, Tokyo Institue of Technology)
Organic semiconductors (OSCs) 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 (M) thin film layer. Field-effect transistors of single crystal organic semiconductors (sc-OSCs) with the new electrodes of M/pc-OSC/TTC (M: Ca or Au) show both highly-efficient electron and hole injection. Contact resistances of electron and hole injection from Ca/pc-OSC/TTC and Au/pc-OSC/TTC are lower than those from pure Ca for electrons and Au for holes, respectively. Equivalent high field-effect mobilities of holes (22 cm2V–1s–1) and electrons (5.0 cm2V–1s–1) were observed in a rubrene single crystal, which are the highest among field-effect transistors with electrodes so far proposed. The new electronde are useful in high performance and air stable lihgt emitting field-effect transistors.
*This work was partially supported by JSPS KAKENHI Grant Number JP17H05326, and the financial support for collarborative researches by AIMR, Tohohku University.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.MAR.B17.10
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