Blue organic multifunctional fluorescent materials for efficient full-color and white organic light-emitting diodes

Abstract

Nowadays, blue organic multifunctional fluorescent (OMF) materials have attracted great interest due to their potentiality to be used as emitters for blue non-doped organic light-emitting diodes (OLEDs) and as hosts to transfer energy to long-wavelength guests. Moreover, blue OMF fluorophores can easily achieve full-color and white emission only with the participation of extra red, yellow and green dopants. Therefore, these materials are of great significance for simplifying the device's structure and preparation process to lower the device's manufacturing cost. Recently, many blue OMF materials have been reported and exhibited excellent electroluminescence performances. This review systematically summarizes the recent progress of blue OMF materials and briefly discusses their molecular design. We have classified the materials according to their molecular building blocks and summarized their molecular design strategies, photophysical properties, luminescence mechanisms and device performances. Furthermore, we discuss the pros and cons of the reported OMF materials and provide an outlook for their development in the future. We believe that blue OMF will play a key role in achieving low-cost and commercialized OLEDs.