TY - JOUR
T1 - Highly effi cient solution-processed host-free organic light-emitting diodes showing an external quantum effi ciency of nearly 18% with a thermally activated delayed fl uorescence emitter
AU - Wada, Yoshimasa
AU - Shizu, Katsuyuki
AU - Kubo, Shosei
AU - Fukushima, Tatsuya
AU - Miwa, Takuya
AU - Tanaka, Hiroyuki
AU - Adachi, Chihaya
AU - Kaji, Hironori
N1 - Funding Information:
This research was funded by the Japan Society for the Promotion of Science (JSPS) through the “Funding Program for World-Leading Innovative R&D on Science and Technology (FIRST Program).” This research was also supported by JSPS KAKENHI Grant Number 25248053 and the Collaborative Research Program of the Institute for Chemical Research, Kyoto University (Grant No. 2015-14). NMR measurements were supported by the Joint Usage=Research Center (JURC) at the Institute for Chemical Research, Kyoto University, Japan.
Publisher Copyright:
© 2016 The Japan Society of Applied Physics.
PY - 2016/3
Y1 - 2016/3
N2 - We demonstrate solution-processed host-free organic light-emitting diodes (OLEDs) using a thermally activated delayed fluorescence emitter 10-[4-(4,6-diphenyl-1,3,5-triazin-2-yl)phenyl]-9,9-dimethylacridan (DMAC-TRZ). A spin-coated neat DMAC-TRZ film shows weak concentration quenching, leading to a high photoluminescence quantum yield (PLQY) of 84%. OLEDs containing a neat film of DMAC-TRZ display a maximum external quantum efficiency (EQE) of 17.6%. Both the PLQY and EQE are the highest reported for solution-processed host-free films and OLEDs, respectively. In addition, the OLEDs exhibit an EQE of 16.8% at high luminance (over 400 cd m%2).
AB - We demonstrate solution-processed host-free organic light-emitting diodes (OLEDs) using a thermally activated delayed fluorescence emitter 10-[4-(4,6-diphenyl-1,3,5-triazin-2-yl)phenyl]-9,9-dimethylacridan (DMAC-TRZ). A spin-coated neat DMAC-TRZ film shows weak concentration quenching, leading to a high photoluminescence quantum yield (PLQY) of 84%. OLEDs containing a neat film of DMAC-TRZ display a maximum external quantum efficiency (EQE) of 17.6%. Both the PLQY and EQE are the highest reported for solution-processed host-free films and OLEDs, respectively. In addition, the OLEDs exhibit an EQE of 16.8% at high luminance (over 400 cd m%2).
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U2 - 10.7567/APEX.9.032102
DO - 10.7567/APEX.9.032102
M3 - Article
AN - SCOPUS:84959886096
SN - 1882-0778
VL - 9
JO - Applied Physics Express
JF - Applied Physics Express
IS - 3
M1 - 032102
ER -