Preparation and electrical characterization of Au/n-Si (1 1 0) structure with PVA–nickel acetate composite film interfacial layer

Abstract

Two types of Schottky diodes, with and without PVA (Ni-doped) layer, were fabricated to investigate whether or not the PVA (Ni-doped) layer is effective on some electrical parameters such as ideality factor n, barrier height [Formula: see text] , series resistance Rs, and interface state density NSS. PVA (Ni-doped) microdrops film was deposited on n-type silicon substrate. SDs with and without PVA (Ni-doped) layer, namely MPS and MS diodes, respectively, were investigated by current–voltage ( I–V) measurements at room temperature. Also, series resistance calculations have been performed using Cheung method. The values of n and Rs obtained for MPS are found higher compared to those of MS. This is attributed to the particular distribution of NSS, and inhomogeneity of barrier height and interfacial layer at metal/semiconductor (M/S) interface. Au/PVA(Ni-doped)/n-Si diode (MPS) exhibits a photovoltaic behavior with an open circuit voltage Voc 0.42 V and short-circuit current ISC 33.2 µA under 100 mW/cm2 illumination intensity. The obtained photovoltaic results indicate that the MPS diode can be used as an efficient material for applications in optoelectronic applications such as solar cells and photodiode devices.

Investigation of electrical and photovoltaic properties of Au/poly(propylene glycol)-b-polystyrene/n-Si diode at various illumination intensities

“…R s changes from region to region and it is effective on the I-V characteristics of the diode. The series resistance can be calculated by various techniques [7,[12][13][14][15], however, in order to obtain the behavior of the resistance in each region, Ohm's law where resistance (R i ) value is given by R i = dV/dI could simply be used. The obtained R i values of the diode are given in Figure 4.…”

“…Also, homogeneity or inhomogeneity of barrier height and it's formation affect the main electrical characteristics of the diode [19][20][21][22]. Due to the above mentioned reasons, the N ss values were calculated using Card and Rhoderick's function [7,[12][13][14][15];…”

“…In n-type semiconductors, the energy of surface states E ss with respect to the energy of conduction band edge, E c , at the semiconductor surface is given by [7,12,13],…”

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

“…[1][2][3][4][5] Generally, polymeric materials are used extensively as interfacial layer material in metal-organic polymerssemiconductor (MPS) and similar structures due to their optical and electrical properties in the study area of Schottky diodes, photodiodes, solar cells, light emitting diodes, thin film transistors, sensors, and so forth. [1][2][3][4][5][6][7][8][9][10] Polyvinyl alcohol (PVA) is semicrystalline, water-soluble 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. 1,2,5,[10][11][12][13] PVA is a potential material having very high dielectric strength (>1000 kV/mm), 3,4 good charge storage capacity, besides its interesting physical properties which arise from the presence of OH groups and hydrogen bond formation.…”

“…[1][2][3][4][5][6][7][8][9][10] Polyvinyl alcohol (PVA) is semicrystalline, water-soluble 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. 1,2,5,[10][11][12][13] PVA is a potential material having very high dielectric strength (>1000 kV/mm), 3,4 good charge storage capacity, besides its interesting physical properties which arise from the presence of OH groups and hydrogen bond formation. PVA, henceforth, as one of the most important polymers is used as interfacial organic layer material and has attracted great attention especially in the case of disperse material-dependent electrical and optical properties.…”