TDBA-SAF is deep blue multiple resonance thermally activated delayed fluorescence (MR-TADF) emitter with oxygen-bridged triaryl-boron core (DOBNA) as electron acceptor unit and spiro[acridine-9,9'-fluorene] as the electron donor unit. Due to the rigid donor and acceptor units, TDBA-SAF exhibits narrow emission spectrum with the FWHM of less than 65 nm. The extended molecular structure along the transition dipole moment direction results in a highly horizontal emitting dipole ratio over 80%. Deep blue TADF-OLED based on TDBA-SAF as the dopant and DPEPO as the host exhibits a maximum EQE of 28.2% and CIE coordinates of (0.142, 0.090).

Also, TDBA-SAF can be employed as the sensitizer in hyperfluorescence devices. Deep blue hyperfluorescence TADF (HF-TADF) device based on Tp-DABNA as the emitter and TDBA-SAF as the sensitizer demonstrates great device performance with an EQEmax of 28.7 % and mitigated efficiency roll-offs.

General Information

Product Details

Chemical Structure

Device Structure(s)

Device structure	ITO (70 nm)/ MoO3 (1 nm)/TAPC (40 nm)/TCTA (10 nm)/mCP (10 nm)/DPEPO:20 wt.% TDBA-SAF (25 nm)/DPEPO (5n m)/Bphen (30 nm)/LiF (0.7nm)/Al (100 nm) [1]
Colour	Blue light emission at 456 nm
FWHM	55 nm
CIE coordinates	(0.142, 0.090)
Max Current Efficiency	23.7 cd/A
Max Power Efficiency	19.9 lm/W
Max EQE	28.2%

Device structure	ITO (70 nm)/MoO3 (1 nm)/TAPC (30 nm)/TCTA (10 nm)/mCBP (10 nm)/mCBP:DPEPO:TDBA-SAF:t-DABNA (50:50:20:5 wt.%, 25 nm)/DPEPO (5 nm)/TmPyPB (40 nm)/LiF (1 nm)/Al (100 nm) [2]
Colour	Blue light emission at 466 nm
FWHM	30 nm
CIE coordinates	(0.13, 0.13)
Max Current Efficiency	25.8 cd/A
Max Power Efficiency	22.6 lm/W
Max EQE	25.5%