Enhancement of Dielectric Characteristics of Polyvinyl Alcohol (PVA) Interfacial Layer in Au/PVA/n‐Si Structures by Bi₂O₃Disperse

Abstract

Dielectric characteristics such as dielectric constant (ε′), dielectric loss (ε″), dielectric loss tangent (tanδ) and real and imaginary parts of electrical modulus (Μ′ and Μ″), and ac electrical conductivity (σac) of Au/ Polyvinyl Alcohol (PVA) (Bi2O3‐dispersed)/n‐Si structures have been investigated by using admittance measurements. Results show that the ε′ values of Au/PVA/n‐Si with Bi2O3‐dispersed PVA interfacial layer are very higher compared with those with pure and other dopant/mixture's of PVA. Thus, PVA is made very compatible for device applications with the enhanced dielectric properties by Bi2O3 disperse and its native very high dielectric strength.

Investigation of current‐voltage characteristics and current conduction mechanisms in composites of polyvinyl alcohol and bismuth oxide

“…Over the last decade, various types of metal‐insulator‐semiconductor (MIS) structures have been investigated vastly by many researchers . Metal‐polymer‐semiconductor (MPS) structures are used as an alternative to conventional MIS structures.…”

“…Metal‐polymer‐semiconductor (MPS) structures are used as an alternative to conventional MIS structures. Main reason of using MPS structures is that having an organic interfacial layer between metal and semiconductor, rather than an inorganic one, leads to improvements in the electrical and dielectric properties of the structure . Also, the fact that MPS structures exhibit characteristics that are similar to those of MIS structures allows us to obtain the electrical characteristics of MPS structures the same way we obtain those of MIS structures.…”

“…Therefore, researchers used various polymers in their trial of reaching better structure characteristics. Among these polymers, polyvinyl alcohol (PVA) comes forward since it is a low cost material, which is easily processed even on flexible surfaces, it also diminishes the density of interface traps ( D it ) at the PVA/n‐Si thanks to better compatibility with n‐Si .…”

“…Besides, PVA's conformity to several reagents; such as Biacetate, Co‐acetate, Ni‐acetate, Zn‐acetate and etc., yields further improvements such as increased dielectric constant, photoconductivity and etc. . Because of this conformity, PVA is a promising material for MPS structures since it is observed that some main electrical parameters, such as ideality factor, barrier height, series, and shunt resistance, can be modified through these reagents.…”

Photoluminescent, morphological and electrical properties of ZrO2 and ZrO2:polyvinyl alcohol composite thin films

“…Such advantages enable depositions to be performed over a large area at relatively low temperature. PVA is semicrystalline, watersoluble with low electrical conductivity polymer and widely used as fiber mats, films, paper coatings, membranes, and so on, due to its excellent chemical and physical properties, nontoxicity, processability, good chemical resistance, wide range of crystallinity, and good film formation capacity [13]. Shao et al [14] reported the thin PVA/zirconium oxychloride composite fibers prepared by using sol-gel processing and electrospinning techniques.…”