Loading…

Flexible Active-Matrix Organic Light-Emitting Diode Display Using Air-Stable Organic Semiconductor of \hbox[\hbox, \hbox\hbox: \hbox^, \hbox^ \hbox]\hbox[\hbox, \hbox \hbox] \hbox \hbox

We developed a flexible active-matrix (AM) organic light-emitting diode (OLED) display driven by an organic thin-film transistor (TFT) (OTFT) using an air-stable organic semiconductor (OSC) of dinaphtho[2, 3 -b:2', 3' -f]thieno[ 3, 2 -b]-thiophene (DNTT) for the first time. We employed a l...

Full description

Saved in:
Bibliographic Details
Published in:IEEE transactions on electron devices 2012-12, Vol.59 (12), p.3442-3449
Main Authors: Fujisaki, Y., Nakajima, Y., Takei, T., Fukagawa, H., Yamamoto, T., Fujikake, H.
Format: Article
Language:English
Subjects:
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We developed a flexible active-matrix (AM) organic light-emitting diode (OLED) display driven by an organic thin-film transistor (TFT) (OTFT) using an air-stable organic semiconductor (OSC) of dinaphtho[2, 3 -b:2', 3' -f]thieno[ 3, 2 -b]-thiophene (DNTT) for the first time. We employed a low-temperature cross-linkable olefin-type polymer as the gate insulator (GI) and investigated the properties of the interface between DNTT and polymer GI. The top-contact TFT demonstrated a high mobility of up to 0.8 cm 2 /V·s and a near-zero turn-on voltage. DNTT has a deeper highest occupied molecular orbital level than other OSC materials, and this leads to large contact resistance between the source/drain (S/D) contact and OSC. Surface modifications to the S/D contact were investigated to enable efficient carrier injection to fabricate high-performance bottom-contact TFTs. The short-channel TFT we fabricated exhibited a high hole mobility of 0.5 cm 2 /V·s, a low subthreshold slope of 0.31, and excellent environmental and operational stability. The DNTT-based TFT also demonstrated good applications to processes with less deterioration. Finally, a 5-in flexible OLED display was successively fabricated by integrating the AM backplane with a phosphorescent OLED device. A high luminescence over 300 cd/ m 2 was achieved by driving the DNTT-based OTFTs.
ISSN:0018-9383
1557-9646
DOI:10.1109/TED.2012.2220968