Poly(1,4-phenylene vinylene) Derivatives with Ether Substituents to Improve Polymer Solubility for Use in Organic Light-Emitting Diode Devices

Abstract

New ether-substituted poly(1,4-phenylene vinylene) (PPV) derivatives were synthesized via Horner–Emmons coupling. The structures of the monomers and the resultant oligomers were confirmed by 1H and 13C NMR spectroscopies. The molecular weights of the oligomers were characterized by gel permeation chromatography, giving the number-average and weight-average molecular weights and the corresponding polydispersity indices. Measurements of UV–vis absorption and fluorescence were used to characterize the optical properties of the oligomers. Estimation of the highest occupied molecular orbital and lowest unoccupied molecular orbital energy levels and other electrochemical characteristics of the oligomers were investigated by cyclic voltammetry. Dialkyl and dialkoxy PPV oligomers were also prepared and characterized following the same instrumental methods used for the ether-substituted oligomers, providing a known reference system to judge the performance of the new conjugated oligomers. Devices were fabricated to analyze the electroluminescent characteristics of the oligomers in organic light-emitting diodes.

Structural and Morphological Characterization of MEH-PPV/Ag Composite

“…Poly (phenylenevinylene) (PPV) is the only polymer of its type that can be treated into a highly ordered crystalline thin film [1][2][3][4][5][6][7][8][9], and its conjugated nature has received a lot of attention since it becomes electrically conductive upon doping. Using conducting polymer materials as an active medium has led to the development of several optoelectronic devices, including field effect transistors, light-emitting diodes (LED), and photo-diodes (bulk heterojunction) [10][11][12][13][14][15][16][17][18][19].…”

Synthesis, Characterization, and Optical Properties of Carbazole-Functionalized Poly(norbornene-dicarboximide) by ROMP

“…They also serve as hole-transporting and electron-blocking layers in OLEDs. Their high glass transition temperatures and thermal decomposition temperatures further expand their potential applications [26][27][28][29][30][31][32][33][34][35] .…”

Synthesis and Electron Transporting Properties of Diblock Copolymers Consisting of Polyfluorene and Polystyrene

“…Polymer light-emitting diode (PLED) materials have been employed to convert electrical energy into light due to their numerous advantages, including mechanical flexibility, low cost, high thermal stability, uniform brightness, rapid response time, and wide viewing angles [ 1 , 2 , 3 , 4 , 5 , 6 ].…”