TY - JOUR
T1 - Analysis of efficiency variations in ν-DABNA based thermally activated delayed fluorescence OLED devices
AU - Yang, Ki Joon
AU - Lee, Hyuna
AU - Braveenth, Ramanaskanda
AU - Hwang, Soon Jae
AU - Kim, Su Jeong
AU - Kwon, Jang Hyuk
N1 - Funding Information:
This work was supported by the Technology Innovation Program (20015850) funded by the Ministry of Trade, Industry & Energy (MOTIE, Korea).
Publisher Copyright:
© 2021 The Korean Society of Industrial and Engineering Chemistry
PY - 2022/4/25
Y1 - 2022/4/25
N2 - Recently, diboron based blue thermally activated delayed fluorescence (TADF) material, N7,N7,N13,N13,5,9,11,15-octaphenyl-5,9,11,15-tetrahydro-5,9,11,15-tetraaza-19b, 20b-diboradinaphtho[3,2,1-de:1′,2′,3′-jk] pentacene-7,13-diamine (ν-DABNA) has drawn attention from the researchers due to its good device performances as well as narrow full-width at half maximum (FWHM) in OLED devices. In this work, we report a detailed analysis to understand the exact reason behind the efficiency variations in ν-DABNA based TADF devices using different types of host materials. Interestingly, we found that triplet exciton density of ν-DABNA molecule is mainly located at the central region, so the triplet exciton energy transfer from the host material is hindered due to the presence of peripheral diphenylamine extensions. Hence, our analysis suggests that utilizing wide band gap host materials in ν-DABNA based TADF devices exhibit excellent device efficiencies with the support of trap assisted emission mechanism. This study brings an in-depth understanding of efficiency variations in the ν-DABNA based OLED devices.
AB - Recently, diboron based blue thermally activated delayed fluorescence (TADF) material, N7,N7,N13,N13,5,9,11,15-octaphenyl-5,9,11,15-tetrahydro-5,9,11,15-tetraaza-19b, 20b-diboradinaphtho[3,2,1-de:1′,2′,3′-jk] pentacene-7,13-diamine (ν-DABNA) has drawn attention from the researchers due to its good device performances as well as narrow full-width at half maximum (FWHM) in OLED devices. In this work, we report a detailed analysis to understand the exact reason behind the efficiency variations in ν-DABNA based TADF devices using different types of host materials. Interestingly, we found that triplet exciton density of ν-DABNA molecule is mainly located at the central region, so the triplet exciton energy transfer from the host material is hindered due to the presence of peripheral diphenylamine extensions. Hence, our analysis suggests that utilizing wide band gap host materials in ν-DABNA based TADF devices exhibit excellent device efficiencies with the support of trap assisted emission mechanism. This study brings an in-depth understanding of efficiency variations in the ν-DABNA based OLED devices.
KW - Host engineering
KW - Light-emission mechanism
KW - TADF OLED
KW - ν-DABNA
UR - http://www.scopus.com/inward/record.url?scp=85122478031&partnerID=8YFLogxK
U2 - 10.1016/j.jiec.2021.12.024
DO - 10.1016/j.jiec.2021.12.024
M3 - Article
AN - SCOPUS:85122478031
VL - 108
SP - 47
EP - 53
JO - Journal of Industrial and Engineering Chemistry
JF - Journal of Industrial and Engineering Chemistry
SN - 1226-086X
ER -