Growth and characterization of lead sulfide films deposited on glass substrates

Abstract

Lead-sulfide (PbS) films have been deposited by chemical deposition method on glass substrates. The details of the preparation method are described. The advantage of this method is simple, relatively inexpensive and easily controlled method that is producing large-area films. Some data about the electrical properties, structure, composition of the films and thermal stability of the powder samples are also presented. The structure and crystallite sizes were determined by X-ray diffraction studies. The films are very adherent to the substrates. The films are polycrystalline and average crystallite sizes are 15 nm. The surface morphology of the as-deposited and heated films was studied with a scanning electron microscope. The rate of deposition and terminal thickness have been determined. Hall measurements were performed at room temperature for films deposited on glass substrate to determine the carrier density, Hall mobility and the mean free path of the carriers.PACS numbers: 73.61.Jc UDC 538.975

Growth of quantum dot coated core-shell anisotropic nanowires for improved thermal and electronic transport

“…P-Type nature is commonly observed in the solution-processed lead chalcogenide nanostructure, and its p-type characteristics are attributed to oxygen exposure and chemical interaction during device fabrication regardless of intrinsic stoichiometry. 37 According to the cylinder-on-plate model, 38 the maximum field-effect mobility was calculated to be 30.65 cm 2 /Vs, which is much higher than bulk PbS (5 cm 2 /Vs) 39 and other reported solution-processed analogous materials (Tables S1 and S2). 22,40 We attribute this excellent hole mobility to the QD shells which boost the charge transport via manifold transfer dynamics (e.g., quantum tunneling or hopping).…”

Studies on Lead Sulfide (PbS) Semiconducting Thin Films Deposited from Nanoparticles and Its NLO Application

“…Pb 2þ ions precipitate from the solution leading to the formation of PbS 22,23 SCðNH 2 Þ 2 þ OH À ! CH 2 N 2 þ H 2 O þ SH À HPbO À 2 þ SH À !…”

Characterization of nanocrystalline PbS thin films prepared using microwave-assisted chemical bath deposition

“…The carrier concentration at room temperature can be determined from the Hall coefficient using the following equation [31]:…”

“…It was observed also that the mobility decreased from 9.25 to 1.05 (cm 2 /V s) with increasing the deposition time. Salim and Hamid [31] found that the mobility of PbS thin films is about 5 cm 2 / V s. Table 3 summarized the electrical properties of the as-prepared nanocrystalline PbS thin films.…”