TY - JOUR
T1 - Simplified thermally activated delayed fluorescence organic light-emitting diodes
AU - Park, Chan Hyuk
AU - Shim, Yong Sub
AU - Park, Cheol Hwee
AU - Jung, Sun Gyu
AU - Park, Young Wook
AU - Ju, Byeong Kwon
N1 - Funding Information:
This research was supported by the Industry Technology R&D program of MOTIE/KEIT . (No. 10048317 , Development of red and blue OLEDs with external quantum efficiency over 20% using delayed fluorescent materials), and the Brain Korea 21 Plus Project in 2018. In addition, this research was supported by the Basic Science Research Program through the National Research Foundation of Korea funded by the Ministry of Education, Science and Technology ( NRF-2017R1D1A1B03036520 and No. 2016R1A2B4014073 ).
Publisher Copyright:
© 2018 Elsevier B.V.
PY - 2018/12
Y1 - 2018/12
N2 - Recently, after the first demonstration of efficient, thermally activated delayed fluorescence (TADF) organic light-emitting diodes (OLEDs), these devices have been widely investigated, and several new materials (hole and electron transport materials) have been reported. In this work, we demonstrate highly efficient TADF OLEDs with a simplified structure, and systematically characterize these partially evaluated reported materials; (4s,6s)–2,4,5,6,–tetra(9H–carbazol–9–yl)isophthalonitrile (4CzIPN) has been used as a TADF emissive dopant; the exciton blocking and carrier transport characteristics of 9,9′–Diphenyl–6–(9–phenyl–9H–carbazol–3–yl)–9H,9′H–3,3′–bicarbazole (Tris-PCz) and 2,7–bis(2,2′–bipyridin–5–yl)triphenylene (BPy-TP2) have been characterized and compared with those of other widely used well-known organic materials. The demonstrated simplified TADF OLEDs with a 4CzIPN doped single emissive layer showed a high peak external quantum efficiency and power efficiency of 18.6% and 31.5 lm/W, respectively.
AB - Recently, after the first demonstration of efficient, thermally activated delayed fluorescence (TADF) organic light-emitting diodes (OLEDs), these devices have been widely investigated, and several new materials (hole and electron transport materials) have been reported. In this work, we demonstrate highly efficient TADF OLEDs with a simplified structure, and systematically characterize these partially evaluated reported materials; (4s,6s)–2,4,5,6,–tetra(9H–carbazol–9–yl)isophthalonitrile (4CzIPN) has been used as a TADF emissive dopant; the exciton blocking and carrier transport characteristics of 9,9′–Diphenyl–6–(9–phenyl–9H–carbazol–3–yl)–9H,9′H–3,3′–bicarbazole (Tris-PCz) and 2,7–bis(2,2′–bipyridin–5–yl)triphenylene (BPy-TP2) have been characterized and compared with those of other widely used well-known organic materials. The demonstrated simplified TADF OLEDs with a 4CzIPN doped single emissive layer showed a high peak external quantum efficiency and power efficiency of 18.6% and 31.5 lm/W, respectively.
KW - 4CzIPN
KW - Organic light-emitting diodes
KW - Simplified structure
KW - Thermally activated delayed fluorescence
UR - http://www.scopus.com/inward/record.url?scp=85054782538&partnerID=8YFLogxK
U2 - 10.1016/j.optmat.2018.10.002
DO - 10.1016/j.optmat.2018.10.002
M3 - Article
AN - SCOPUS:85054782538
SN - 0925-3467
VL - 86
SP - 233
EP - 238
JO - Optical Materials
JF - Optical Materials
ER -