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CzAcSF is an unsymmetrical acridine derivative with one carbazole and one 9,9-dimethyl- 9,10-dihydroacridine attached to a diphenyl sulfonyl centre. CzAcSF is normally used as blue TADF dopant for highly efficient TADF-OLED devices. A quantum efficiency of 18.1%  has been achieved at a doping concentration of 0.1% TBPE in active emitting layer of DPEPO:CzAcSF.
CzAcSF can also be used as a bipolar host material to harvest singlet excitons of TBPe dopant material by a Forster energy transfer process. BFOXD-based devices exhibit better performances, with a maximum external quantum efficiency (EQE) of 20.1% while using CzAcSF as the host .
High efficiency blue fluorescent organic light-emitting diodes using a conventional blue fluorescent emitter, I. Lee et al., J. . Mater. Chem. C, 3, 8834-8838 (2015); DOI: 10.1039/C5TC01626F.
Solution-Processed Highly Efficient Bluish-Green Thermally Activated Delayed Fluorescence Emitter Bearing an Asymmetric Oxadiazole–Difluoroboron Double Acceptor, D. Zhou et al., ACS Appl. Mater. Interfaces, 11, 27, 24339–24348 (2019); DOI: 10.1021/acsami.9b07511.
Host Engineering for High Quantum Efficiency Blue and White Fluorescent Organic Light-Emitting Diodes, W. Song et al., Adv. Mater., 27, 4358–4363 (2015); DOI: 10.1002/adma. 201501019.
Emergence of White Organic Light-Emitting Diodes Based on Thermally Activated Delayed Fluorescence, P. Xiao et al., Appl. Sci., 8, 299 (2018); DOI: 10.3390/app8020299.
π-Stacked Thermally Activated Delayed Fluorescence Emitters with Alkyl Chain Modulation, T. Wang et al., CCS Chem., 2, 1757–1763 (2020); DOI: 10.31635/ccschem.020.202000355.
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