Preparation of Metal Electrode Materials and Absorber Layers for Flexible PV Application

  • Thamer Alraddadi

Student thesis: Phd

Abstract

With the rapid growth of electronic technologies, the demand for portable electronic devices is increasing. Therefore, chemists and materials researchers are exploring and developing new materials and fabrication processes to produce highly flexible, fully portable, and low-cost electronic devices. The work presented here involved the synthesis of copper, bismuth sulfide, and lead sulfide nanoparticles, as well as the deposition of lead sulfide on cellulose substrate. Several copper(II) amino carboxylic acid complexes; namely glycine (Gly), L-alanine (L-Ala), L-valine (L-Val) and picolinic acid (Pic) have been synthesised and characterised. The complexes were used as precursors for the preparation of copper nanostructure by solid-state reaction under nitrogen at three different temperatures 350, 400 and 450 °C, respectively. Also, hot injection method at 270 °C in oleylamine has been used to synthesise Cu NPs at different times such as 10, 30 and 60 min. The copper nanostructures were characterised by powder X-ray diffraction, Raman spectrum and scanning electron microscopy. Bismuth (III) xanthate complexes with formula [Bi(S2COR)4][N(C2H5)4)] where R = methyl, ethyl, n-propyl, iso-propyl, n-butyl, iso-butyl, pentyl and n-hexyl, were synthesised. The X-ray single crystal structures of these complexes and their thermal decomposition have been studied. Bi2S3 nanocrystals with flake-like shape morphology were obtained from the thermolysis of [Bi(S2COR)4(N(C2H5)4)] where R = ethyl, n-propyl, n-butyl and n-hexyl at three different temperatures 250, 300 and 350 °C under nitrogen. Lead(II) alky xanthate complexes where alky are ethyl, n-propyl, n-butyl and n-hexyl have been synthesised, characterised and used as single-source precursors for the deposition of lead sulfide nanoparticles on two types of cellulose substrates (filter paper and cotton yarn) at 200 °C under nitrogen. Cubic morphology of PbS has been obtained with different size. The decrease of the particle size by increasing the length of alkyl chain result in the increased bandgap of lead sulfide deposited on cellulose substrate.
Date of Award1 Aug 2020
Original languageEnglish
Awarding Institution
  • The University of Manchester
SupervisorDavid Collison (Supervisor), Paul O'Brien (Supervisor) & David Lewis (Supervisor)

Keywords

  • Flexible PV
  • Nanoparticles
  • Semiconductor

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