Synthesis and Light-emitting Properties of Random Copolymers Composed of Phenylsilyl- and Alkoxy-Sustituted Phenylenevinylene

Abstract

New random copolymers of phenylsilyl-and alkoxy-substituted phenylenevinylene, DMPS(9)-MEH(1)-PPV, DMPS(5)-MEH(5)-PPV and DMPS(1)-MEH(9)-PPV, have been synthesized by the Gilch dehydrohalogenation route, and the light-emitting properties of these polymers have been studied. The synthesized polymers were completely soluble in common organic solvents, and exhibited good thermal stability, almost up to 380℃. They showed UV-visible absorbance and photoluminescence (PL) in the ranges of 422-510 and 513-590 nm, respectively, according to their feed ratios. Electroluminescent devices were fabricated with these polymers as emitting layers, and ITO and Al as anode and cathode, respectively. DMPS(1)-MEH(9)-PPV, DMPS(5)-MEH(5)-PPV and DMPS(9)-MEH(1)-PPV exhibited EL emission maxima at 575 nm, 565 nm, and 541 nm, respectively.

Highly efficient nanocrystalline CsxMA1−xPbBrx perovskite layers for white light generation

“…MEH-PPV polymer can stand as an alternative red emitter which was recently used with a CsPbBr 2 Cl nanocrystal perovskite in a white LED [12]. Broadband red emission of MEH-PPV can provide relatively high yield of up to 40% [27,28]. Therefore, rare earth element phosphors used in commercial white LEDs could be readily replaced with more abundant and cost-efficient green bromide perovskite and red MEH-PPV light converters in order to boost mass production of cost-efficient white LEDs providing high color rendering index and easily tunable color temperature.…”