TY - JOUR
T1 - Spin-polarized carrier injection through hybrid ferromagnetic electrode for enhanced optical efficiency of organic light-emitting diodes
AU - Hwang, Ha
AU - Yoon, Deok Hyeon
AU - Shin, Im Hyuk
AU - Yoon, In Seon
AU - Kwack, Jin Ho
AU - Lee, Ouk Jae
AU - Park, Young Wook
AU - Ju, Byeong Kwon
N1 - Funding Information:
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea Government ( MSIT ) (No. 2019R1A2B5B01070286 ), Basic Science Research Program of the National Research Foundation of Korea (NRF) funded by the Ministry of Education (No. NRF-2017R1D1A1B03036520 ), the National Research Council of Science & Technology (NST) grant (No. CAP-16-01-KIST ), the KIST Institutional Program (2E30600), and the Brain Korea 21 Plus Project in 2019.
Publisher Copyright:
© 2020 Elsevier B.V.
PY - 2020/9
Y1 - 2020/9
N2 - Organic light-emitting diodes (OLEDs) with an enhanced optical efficiency were fabricated using a hybrid ferromagnetic (FM) electrode that injected spin-polarized carriers (spin-polarized current). The optical efficiency of the fluorescent OLEDs was increased through the injected spin-polarized carriers, which increased the formation ratio of singlet to triplet exciton. The OLED with the hybrid FM electrode exhibited enhancements of 66.6% in the external quantum efficiency at 50 mA/cm2 and 31.8% in the power efficiency at 500 cd/m2, compared with a reference device at room temperature. The hybrid FM electrode was designed using the finite-difference time-domain method to obtain a high optical efficiency while preventing spectrum distortion.
AB - Organic light-emitting diodes (OLEDs) with an enhanced optical efficiency were fabricated using a hybrid ferromagnetic (FM) electrode that injected spin-polarized carriers (spin-polarized current). The optical efficiency of the fluorescent OLEDs was increased through the injected spin-polarized carriers, which increased the formation ratio of singlet to triplet exciton. The OLED with the hybrid FM electrode exhibited enhancements of 66.6% in the external quantum efficiency at 50 mA/cm2 and 31.8% in the power efficiency at 500 cd/m2, compared with a reference device at room temperature. The hybrid FM electrode was designed using the finite-difference time-domain method to obtain a high optical efficiency while preventing spectrum distortion.
KW - Ferromagnetic electrode
KW - Finite-difference time-domain simulation
KW - Organic light-emitting diode
KW - Spin-organic light-emitting diode
KW - Spin-polarized carrier injection
KW - Spin-polarized current
UR - http://www.scopus.com/inward/record.url?scp=85084078824&partnerID=8YFLogxK
U2 - 10.1016/j.orgel.2020.105755
DO - 10.1016/j.orgel.2020.105755
M3 - Article
AN - SCOPUS:85084078824
SN - 1566-1199
VL - 84
JO - Organic Electronics: physics, materials, applications
JF - Organic Electronics: physics, materials, applications
M1 - 105755
ER -