Lead ethyl dithiocarbamates: efficient single-source precursors to PbS nanocubes

Abstract

Lead ethyl dithiocarbamates have been successfully used as single-source precursors for the deposition of PbS using spin coating followed by annealing at moderate temperatures. The thin films were characterized using a powder X-ray diffractometer and were found to be face-centred cubic with the (200) plane being the most preferred orientation. Scanning electron microscopy images showed the formation of well-defined cubes. Optical band gaps of PbS thin films were estimated using Tauc plots as 0.72, 0.73 and 0.77 eV at annealing temperatures of 250, 300 and 400°C. These band gaps were all blue shifted from the bulk value of 0.41 eV. Energy-dispersive X-ray analysis was used to determine the composition of the thin films which showed an approximately 1 : 1 Pb to S ratio.

Hot‐Injection Synthesis of PbE (E= S, Se) Nanoparticles from Dichalcogenoimidophosphinato Lead (II) Complexes

“…Cubic shaped PbS nanoparticles obtained from various single-source precursors have been reported in literature. [27,32,33] However, there has been no report on the synthesis of PbS nanoparticles from precursor (5).…”

“…These include preformed bonds, giving rise to the formation of the desired product with minimal defect . Single source precursors used to synthesize lead chalcogenides include xanthate, carbamato and thio/selenoureato complexes. Dichalcogenophosphinato lead (II) complexes have already been used to produce PbS and PbSe thin films by LPMOCVD and AACVD methods, however, there is no report on their use in the synthesis of PbS/PbSe nanoparticles.…”

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

“…The current study involves the synthesis of bis(diisobutyldithiophosphinato)lead(II) complex and its employment as a single source precursor for the deposition of PbS nanostructures using the AACVD technique. There is a clear difference in the morphology of the nanostructured deposition compared to those previously reported from dithiocarbamates or xanthates precursors [19,20]. The behavior of each single source precursor is different when used for the deposition of nanostructure by Chemical Vapour Deposition (CVD) because the decomposition temperature of each precursor is different as evidenced by their TGA patterns.…”

Lead Sulphide Nanoparticles as Photocatalyst for the Degradation of Methylene Blue: Effects of pH, Time, Adsorption Kinetics and Recyclability Studies

“…Among these synthetic methods, single-source precursor approach is an efficient synthetic technique to prepare high-quality metal sulphide nanoparticles [20]. In this approach, the size and shapes of the as-prepared metal sulphide nanoparticles depend on the nature of the single-source precursor [16], reaction time [21], reaction temperature [22] and stabilized with the use of capping agents [23]. The use of small organic molecules as capping agents results in agglomeration and oxidation of PbS nanoparticles [24].…”