TY - JOUR
T1 - Effect of Joule heating on transient current and electroluminescence in p-i-n organic light-emitting diodes under pulsed voltage operation
AU - Yoshida, Kou
AU - Nakanotani, Hajime
AU - Adachi, Chihaya
N1 - Funding Information:
This work was supported by a Grant-in-aid from the Funding Program for World-Leading Innovative R&D on Science and Technology (FIRST) and the International Institute for Carbon Neutral Energy Research (WPI-I 2 CNER) sponsored by the Ministry of Education , Culture, Sports, Science and Technology of Japan. We thank to Akiko Hamada and Makoto Yoshizaki, i 3 -Center for Organic Photonics and Electronics Research (i 3 – OPERA) for assistant to fabricate ITO coated sapphire substrate. We also grateful thank to Sangarange Don Atula Sandanayaka, Le Zhang, and William John Potscavage, Jr., for fruitful discussions and assistance for preparation of this manuscript.
Publisher Copyright:
© 2016 Elsevier B.V. All rights reserved.
PY - 2016/4/1
Y1 - 2016/4/1
N2 - The transient current and electroluminescent characteristics of p-i-n organic light-emitting diodes driven using short voltage pulses with various amplitudes and pulse widths were investigated to understand high current behavior (>10 A/cm2). Even under short voltage pulse operation, Joule heating was found to strongly affect the transient characteristics and lead to temperature rises estimated to be over 100 K in the high current density region (>400 A/cm2). This results in a large increase in both current density and EL intensity within the pulse width. In addition, the Joule heating was found to have an effect on the external quantum efficiency. However its contribution was found to be limited compared with the other quenching mechanism, singlet-polaron quenching.
AB - The transient current and electroluminescent characteristics of p-i-n organic light-emitting diodes driven using short voltage pulses with various amplitudes and pulse widths were investigated to understand high current behavior (>10 A/cm2). Even under short voltage pulse operation, Joule heating was found to strongly affect the transient characteristics and lead to temperature rises estimated to be over 100 K in the high current density region (>400 A/cm2). This results in a large increase in both current density and EL intensity within the pulse width. In addition, the Joule heating was found to have an effect on the external quantum efficiency. However its contribution was found to be limited compared with the other quenching mechanism, singlet-polaron quenching.
UR - http://www.scopus.com/inward/record.url?scp=84957080025&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84957080025&partnerID=8YFLogxK
U2 - 10.1016/j.orgel.2016.01.039
DO - 10.1016/j.orgel.2016.01.039
M3 - Article
AN - SCOPUS:84957080025
SN - 1566-1199
VL - 31
SP - 287
EP - 294
JO - Organic Electronics
JF - Organic Electronics
ER -