Ultrathin non-doped thermally activated delayed fluorescence emitting layer for highly efficient OLEDs
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We report highly efficient, ultrathin non-doped green and bluish-green organic light-emitting diodes (OLEDs) using a thermally activated delayed fluorescence (TADF) emitter. The green OLED with an ultrathin (~1 nm) EML showed a 2.6-fold higher external quantum efficiency (EQEmax) of 13.5% with a luminance of 17,250 cd/m2 than the conventional (30 nm) non-doped device.
Nanda , G P , Sk , B , Yadav , N , Rajamanickam , S , Deori , U , Mahashya , R , Zysman-Colman , E & Rajamalli , P 2021 , ' Ultrathin non-doped thermally activated delayed fluorescence emitting layer for highly efficient OLEDs ' , Chemical Communications , vol. In press . https://doi.org/10.1039/D1CC04972K
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DescriptionThe authors are grateful to Prof. Chien-Hong Cheng, National Tsing Hua University, Taiwan for providing facilities for OLED device fabrication and characterization. G.P.N. thanks Council of Scientific & Industrial Research (CSIR) India for the Junior Research Fellowship (JRF). E.Z-C. thanks the Engineering and Physical Sciences Research Council (EPSRC) EP/P010482/1 for support. E. Z.-C. is a Royal Society Leverhulme Trust Senior Research fellow (SRF\R1\201089). P. R. thanks the Indian Institute of Science (IISc) for generous financial support and the Science & Engineering Research Board (SERB), India, for the SERB-Power Grant (SPG) (Grant No: SPG/2020/000107). BS thank IISc for the C. V. Raman Fellowship under the Institute of Eminence (IoE).
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