Journal
JOURNAL OF MATERIALS CHEMISTRY C
Volume 5, Issue 6, Pages 1363-1368Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7tc00025a
Keywords
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Funding
- National Basic Research Program of China 973 Program [2015CB655002, 2013CB834805]
- National Natural Science Foundation of China [91433201, 51603152]
- Innovative Research Group of Hubei Province [2015CFA014]
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The exploitation of blue to orange emissive thermally activated delayed fluorescence (TADF) materials has been conducted comprehensively, while the equally important red TADF materials have been studied at a relatively slow pace. Three D-A-D structured fluorescent molecules, N-4, N-4, N-7, N-7,tetraphenylbenzo[c][1,2,5] thiadiazole4,7- diamine (BTZ-DPA), 4,7- bis(9H-carbazol-9-yl) benzo[c][ 1,2,5] thiadiazole (BTZ-CZ) and 4,7- bis(9,9dimethylacridin- 10(9H)-yl) benzo[c][1,2,5] thiadiazole (BTZ-DMAC) were designed and synthesized by rationally employing 2,1,3-benzothiadiazole as an acceptor. The introduction of 2,1,3-benzothiadiazole not only presents an efficient input for the design of red TADF emitters, but also provides benefits for the resulting high-efficiency organic light-emitting diodes (OLEDs) which show a maximum external quantum efficiency of 8.8% at a luminance of 1.06 cd m(-2) with emission peak at 636 nm.
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