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Upstream product

• 3842-55-5 2-chloro-4,6-diphenyl-1,3,5-triazine 
• 1765-93-1 4-fluoroboronic acid 
• 203450-08-2 2-di(4-fluorophenyl)-4,6-diphenyl-1,3,5-triazine 
• 18628-07-4 9-(9H-carbazol-3-yl)-9H-carbazole 
• 23449-08-3 2-(4-bromobenzenyl)-4,6-diphenyl-1,3,5-triazine 

Relevant academic research and scientific papers

An excited state managing molecular design platform of blue thermally activated delayed fluorescence emitters by π-linker engineering

A molecular design platform of blue thermally activated delayed fluorescence (TADF) emitters to boost the external quantum efficiency and efficiency roll-off of blue TADF organic light-emitting diodes (OLEDs) was developed. A molecular structure hiring one or two excited state controlling subunits in the π-linker between a donor and an acceptor was employed. The subunit in the π-linker was a phenyl unit to precisely control the performances of TADF devices. It was described that the phenyl subunit simultaneously improved the external quantum efficiency and efficiency roll-off of TADF OLEDs. A high external quantum efficiency of 28.5% was demonstrated using the material design having two phenyl sub units.

Combinatorial donor engineering for highly efficient blue thermally activated delayed fluorescence emitters with low efficiency roll-off

A thermally activated delayed fluorescence (TADF) molecule with high reverse intersystem crossing rate accompanied by high photoluminescence quantum yield was developed by combinatorial donor engineering of bicarbazole and 12H-benzofuro[3,2-a]carbazole. The donor was designed to have strong donor character, rigidity and large twisted angle with the acceptor moiety by combining the merits of bicarbazole and benzofurocarbazole. The TADF emitter derived from the new donor achieved high external quantum efficiencies of up to 23.3% and largely suppressed efficiency roll-off at high luminance relative to the control TADF emitters. Therefore, the combinatorial donor approach was effective to trigger the synergistic effect on the device performances of the TADF devices.