Fluorescent deep-blue and hybrid white emitting devices based on a naphthalene–benzofuran compound

• We report the synthesis, photophysical, and electrochemical characterization of naphthalene–benzofuran compound.
• Fluorescent deep-blue emitting devices show the peak external quantum efficiency (EQE) of 4.5% and CIE coordinates of (0.15, 0.07).
• Hybrid white emitting devices having this material as the fluorescent blue emitter show the peak EQE exceeding 10%.

We report the synthesis, photophysics and electrochemical properties of naphthalene–benzofuran compound 1 and its application in organic light emitting devices. Fluorescent deep-blue emitting devices employing 1 as the emitting dopant embedded in 4-4′-bis(9-carbazolyl)-2,2′-biphenyl (CBP) host show the peak external quantum efficiency of 4.5% and Commission Internationale d’Énclairage (CIE) coordinates of (0.15, 0.07). Hybrid white devices using fluorescent blue emitting layer with 1 and a phosphorescent orange emitting layer based on an iridium-complex show the peak external quantum efficiency above 10% and CIE coordinates of (0.31, 0.37).

Graphic abstractFluorescent deep-blue emitting devices based on naphthalene–benzofuran compound show the peak external quantum efficiency of 4.5% and Commission Internationale d’Énclairage (CIE) coordinates of (0.15, 0.07).Figure optionsDownload as PowerPoint slide