Optical Characterization of Luminescence Polymer Blends Using Tauc/Davis-Mott Model

Abstract

The optical and electronic structures of poly (N-carbazole) (PVK) blend with poly(vinylidene fluoride-co-hexafluoropropene) (PVDF-HFP) and polyvinylpyrrolidone (PVP) in the same composition were investigated. Polymer coating was carried out using doctor blade technique on a glass substrate. Uv-vis and photoluminescence spectrum revealed that there are significant different results obtained between PVK, PVK:PVP and PVK:PVDF-HFP. The electronic parameters such as absorption edge (Ee), allowed direct bandgap (Ed), allowed indirect bandgap (Ei) and Urbach edge (Eu) were calculated by using Tauc/Davis-Mott Model. The value of Ee and Ed for PVK and PVK:PVDF-HFP almost same but there was significant different value between Eu and Ei.

Optical properties of P3HT:tributylphosphine oxide-capped CdSe nanocomposites

“…These values are of the same order of those reported in the literature [46][47][48]. This constitutes a measure of the importance of the inhomogeneous disorder and atomic-scale dispersion, induced by the nanocrystal incorporation inside the nanocomposite.…”

Effect of host polymer blends to phosphorescence emission

“…For its future use in phosphorescence polymer light emitting diode as well as electrochemical cell, this present work investigates the effect of host polymers which consist of PVK:PVDF-HfP and PVK:PVP polymer blends to the phosphorescence emission of Europium (III)Tris(dibenzoylmethane) mono(5-amino-1,10-phenanthroline) (EuDBMPhen). The detail investigated of host polymer can be found in the literature [7][8][9][10][11] Two polymer blending systems consist of blended PVK with PVDF-HFP (PVK:PVDF-HFP) and PVK with PVP (PVK:PVP) in the same weight ratio 1:1 were prepared. Meanwhile, pure PVK was also prepared as a control.…”

Conductivity and optical studies of plasticized polymer electrolytes based on 49% PMMA-grafted natural rubber

“…This type of electrolytes are also much pronounce as gel polymer electrolytes (GPEs) [3][4][5]. The plasticizers frequently used in GPEs include propylene carbonate (PC), ethylene carbonate (EC), dimethylformamide (DMF) [19], dibuthyl phthalate (DBP), diocthyl adipate (DOA) and polyethylene glycol (PEG) [6]. These plasticizers were reported compatible with poly (methyl) methacrylate (PMMA) [2,7] and was found to enhance the conductivity.…”