Chrysene-Cored Fluorescent Dendrimers as Nondoped Deep-Blue Emitters for Solution-Processable Electroluminescent Devices

Abstract

New solution-processable chrysene-based deep-blue fluorescent dendrimers bearing chrysene as a core end-capped by carbazole dendrons were designed, synthesized, and characterized. These dendrimers exhibit strong deep-blue emissions in solution and thin film states with decent hole mobility and high thermal and electrochemical stability. They are effectively utilized as non-doped emitters in organic light-emitting diode (OLED). The simple structure non-doped OLEDs show good electroluminescence (EL) performances (luminance of 2334-2400 cd m-2, external quantum efficiency (EQE) of 1.88-2.51%, and turn-on voltage of 3.8-4.0 V) and deep-blue EL spectra (CIEy ≈ 0.065 - 0.075) with narrow full width at half maximum of 61-65 nm.