Nanostructured Lead Sulphide Depositions by AACVD Technique Using Bis(Isobutyldithiophosphinato)Lead(II) Complex as Single Source Precursor and Its Impedance Study

Abstract

This communication reports the synthesis of bis(diisobutyldithiophosphinato)lead(II) complex and its subsequent application as a single source precursor for the nanostructured deposition of lead sulphide semiconductors and its impedance to explore its scope in the field of electronics. Synthesized complex was characterized by microelemental analysis, nuclear magnetic resonance spectroscopy, infrared spectroscopy and thermogravimetric analysis. This complex was decomposed using the aerosol-assisted chemical vapour deposition technique at different temperatures to grow PbS nanostructures on glass substrates. These nanostructures were analyzed by XRD, SEM, TEM and EDX methods. Impedance spectroscopic measurements were performed for PbS in the frequency range of 40 to 6 MHz at room temperature. In a complex impedance plane plot, two relaxation processes were exhibited due to grains and grain boundaries contribution. A high value of dielectric constant was observed at low frequencies, which was explained on the basis of Koops phenomenological model and Maxwell–Wagner type polarization. Frequency-dependent AC conductivity results were compliant with Jonscher power law, while capacitance–voltage loop had a butterfly shape. These impedance spectroscopic results have corroborated the ferroelectric nature of the resultant PbS nanodeposition.

Impedance Spectroscopic Study of Nickel Sulfide Nanostructures Deposited by Aerosol Assisted Chemical Vapor Deposition Technique

“…Previously, we have reported the synthesis of lead sulfide nanostructures from a single molecular precursor Bis (di- iso butyldithiophosphinato)lead(II) complex by AACVD technique [ 30 ]. The current work presents the preparation of Bis (di- iso butyldithiophosphinato)nickel(II) precursor along with its utilization to deposit NiS nanostructures via aerosol assisted chemical vapor deposition (AACVD) approach, and the impedance spectroscopic analysis of deposited NiS nanostructures.…”

Impedance Spectroscopy Analysis of PbSe Nanostructures Deposited by Aerosol Assisted Chemical Vapor Deposition Approach

“…However, AACVD also has a disadvantage-solubility of the precursor in a solvent; if the precursor does not give solubility in a suitable solvent, then it is impossible to utilize AACVD to deposit thin films of that precursor [35]. Deposition of lead chalcogenides with different nanostructures was reported using various single-source precursors, including dichalcocarbamates [36,37], dichalcogenoimidophosphinate lead (II) complexes [27], xanthates [38,39], dichalcogenophosphinates [40,41], dichalcogenophosphates [27], N-acyl selenoureas [42], and metalorganodithiophosphinates [43,44].…”

“…However, because of limited research carried out on the lead (II) diphenyldiselenophosphinate complex, any specific literature about its toxicity concerns has not been discovered. AACVD evades this problem and avoids the release of unsafe lead alkyls in comparison to other commonly used techniques, offering continuous deposition of synthesized material vapors via low pressures [43]. Although lead belongs to the family of heavy metals, it is less toxic in lead chalcogenide form as compared to its metallic form.…”