Nalaoh, Phattananawee; Sungworawongpana, Nathas; Chasing, Pongsakorn; Waengdongbung, Wijitra; Funchien, Patteera; Kaiyasuan, Chokchai; Sudyoadsuk, Taweesak; Promarak, Vinich published the artcile< A Dimeric π-Stacking of Anthracene Inducing Efficiency Enhancement in Solid-State Fluorescence and Non-Doped Deep-Blue Triplet-Triplet Annihilation Organic Light-Emitting Diodes>, Application of C7H6BrNO2, the main research area is anthracene triplet annihilation fluorescence organic light emitting diode.
Triplet-triplet annihilation (TTA) mechanism utilizing the conversion of low triplet energy excitons to generate singlet excitons has been successfully employed in realizing highly efficient fluorescent organic light-emitting diodes (OLEDs). Herein, new anthracene-based TTA mols. (TPNACN and TPBACN) are developed as deep-blue emitters for high-efficiency non-doped TTA-OLEDs. Their structural, phys., and photophys. properties are exptl. and theor. investigated. These compounds in solid-state exhibit different photophys. properties due to a discrepancy in the mol. packing. Particularly, in the crystal of TPNACN, anthracene moieties are arranged with dimeric π-π stacking, and the material shows a strong excimer emission in the deep-blue region with ΦPL close to the ideal theor. value. The non-doped TTA-OLED based on TPNACN attains a high maximum external quantum efficiency of 7.89% (6.63 cd A-1) with a low turn-on voltage of 2.6 V, and displays deep-blue emission with CIE coordinates of (0.146, 0.101). These results prove that a separated dimeric π-stacked mol. alignment of anthracene enhances not only the fluorescence efficiency in the solid state but also the ratio of singlet exciton harvested by the TTA process in the device, bringing about excellent device electroluminescent properties. This can be a new tactic to designing new emissive materials for efficient OLED devices.
Advanced Optical Materials published new progress about Blue-emitting electroluminescent devices. 20776-50-5 belongs to class bromides-buliding-blocks, and the molecular formula is C7H6BrNO2, Application of C7H6BrNO2.
Referemce:
Bromide – Wikipedia,
bromide – Wiktionary