TY - JOUR
T1 - Inkjet printing of thermally activated delayed fluorescence (TADF) dendrimer for OLEDs applications
AU - C, Amruth
AU - Luszczynska, Beata
AU - Szymanski, Marek Zdzislaw
AU - Ulanski, Jacek
AU - Albrecht, Ken
AU - Yamamoto, Kimihisa
N1 - Funding Information:
A.C acknowledges support by the grant 674990 EXCILIGHT - H2020-MSCA-ITN-2015. A.C would like to thank the team of Biosensors and Organic Electronic laboratory, Bionanopark, Lodz, Poland for providing facilities for the fabrication of devices. A.C, B.L. and J.U. acknowledge support by the grant nr 33 0355/PnH/2016 – MNiSW, Poland; and TANGO2/340019/NCBR/2017 – NCBR Poland. K.A. and K.Y. acknowledge support by Grand-in-Aid for Scientific Research on Innovated Areas “π-System Figuration: Control of Electron and Structural Dynamism for Innovative Functions”, JSPS KAKENHI Grant Numbers 17H05146, 15H05757, JST ERATO Grant No.JPMJER1503 and Leading Initiative for Excellent Young Researchers, MEXT, Japan. M. S. acknowledges support by Swedish Knowledge Foundation for the KKSSYNERGY project 2016 “BIO-QC: Quality Control and Purification for New Biological Drugs” (grant number 20170059).
Funding Information:
A.C, B.L. and J.U. acknowledge support by the grant nr 33 0355/PnH/2016 – MNiSW , Poland; and TANGO2/340019/NCBR/2017 – NCBR Poland.
Funding Information:
K.A. and K.Y. acknowledge support by Grand-in-Aid for Scientific Research on Innovated Areas "π-System Figuration: Control of Electron and Structural Dynamism for Innovative Functions”, JSPS KAKENHI Grant Numbers 17H05146 , 15H05757 , JST ERATO Grant No. JPMJER1503 and Leading Initiative for Excellent Young Researchers, MEXT , Japan.
Funding Information:
M. S. acknowledges support by Swedish Knowledge Foundation for the KKSSYNERGY project 2016 “BIO-QC: Quality Control and Purification for New Biological Drugs” (grant number 20170059 ).
Publisher Copyright:
© 2019
PY - 2019/11
Y1 - 2019/11
N2 - This study presents the inkjet printing of a novel OLED device with fully solution-processed organic layers that employ TADF material as an emitting layer. The ink was formulated using new TADF material, triazine core carbazole dendrimers with tert-butyl group at the periphery (tBuG2TAZ), dissolved in a mixture of two non-chlorinated solvents. The influence of the print resolution and the substrate temperature on morphology of the printed films was studied and optimized in ambient conditions. The optimized TADF dendrimer layer was then incorporated in the OLEDs as the emitting layer. The best-printed OLEDs exhibited a maximum current efficiency of 18 cd/A and maximum luminance of 6900 cd/m2. Such values are comparable to the values obtained in spin coated devices made of the same TADF dendrimer. Further, the mobility of charge carriers extracted from transient electroluminescence measurements of printed OLEDs, when compared to reference OLEDs made by spin coating technique, showed similar values. Finally, we have demonstrated the possibility of patterning of emission the area of complex shapes merely by selectively printing the emission layer. These results demonstrate the potential application of the new dendrimer TADF emitters for the fabrication of efficient OLEDs by an inkjet printing technique.
AB - This study presents the inkjet printing of a novel OLED device with fully solution-processed organic layers that employ TADF material as an emitting layer. The ink was formulated using new TADF material, triazine core carbazole dendrimers with tert-butyl group at the periphery (tBuG2TAZ), dissolved in a mixture of two non-chlorinated solvents. The influence of the print resolution and the substrate temperature on morphology of the printed films was studied and optimized in ambient conditions. The optimized TADF dendrimer layer was then incorporated in the OLEDs as the emitting layer. The best-printed OLEDs exhibited a maximum current efficiency of 18 cd/A and maximum luminance of 6900 cd/m2. Such values are comparable to the values obtained in spin coated devices made of the same TADF dendrimer. Further, the mobility of charge carriers extracted from transient electroluminescence measurements of printed OLEDs, when compared to reference OLEDs made by spin coating technique, showed similar values. Finally, we have demonstrated the possibility of patterning of emission the area of complex shapes merely by selectively printing the emission layer. These results demonstrate the potential application of the new dendrimer TADF emitters for the fabrication of efficient OLEDs by an inkjet printing technique.
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U2 - 10.1016/j.orgel.2019.07.011
DO - 10.1016/j.orgel.2019.07.011
M3 - Article
AN - SCOPUS:85068560642
SN - 1566-1199
VL - 74
SP - 218
EP - 227
JO - Organic Electronics: physics, materials, applications
JF - Organic Electronics: physics, materials, applications
ER -