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.

• Periodical: Advanced Materials Research (Volumes 488-489)
• Pages: 628-632
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.488-489.628
• Online since: March 2012
• Authors: Ahmad Nazib Alias, T.T.I Kudin, Z.M. Zabidi, M.K. Harun, M.Z.A. Yahya
• Keywords: Electronic Structure, Luminescence Polymer, Tauc/Davis-Mott Model

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