Synthesis of p-Type Transparent LaOCuS Nanoparticles via Soft Chemistry

Abstract

We report here for the first time on the synthesis of nanoparticles of the p-type transparent conductor LaOCuS. Nanoparticles were obtained via a solvothermal route in ethylenediamine with dehydrated lanthanum chloride (LaCl(3).7H(2)O), copper monooxide, and elemental sulfur as precursors. Powder X-ray diffraction, scanning electron microscopy, energy-dispersive X-ray spectroscopy, and X-ray photoelectron spectroscopy ascertained our sample to be of high purity, while laser diffractometry evidenced a monodisperse particle size distribution centered on 126 nm. The absorption spectrum and the current-potential curves recorded under chopped illumination asserted the optical transparency and the p-type electronic conductivity of our LaOCuS nanoparticles.

Aqueous‐Based Low‐Temperature Synthesis and Thin‐Film Properties of Oxysulfide BiCuOS Nanoparticles

“…But, after 4 hours of reaction, the aggregate consists of primary platelets of around 5 to 10 nm thick and 20 to 30 nm large. This result fits with the anisotropic broadening observed in the XRD peak shapes and the sizes calculated with the Scherrer formula using anisotropic broadening [16] and therefore suggests that the platelets observed on the TEM image are monocrystals.…”

“…Liquid-based routes are well adapted in that matter and enable the tuning of particle morphology. Some previously published studies report the synthesis of BiCuOS, [12] BiCuOSe [15] and LaCuOS [16] through hydrothermal and solvothermal routes. However, these methods generally require the use of solid precursors such as Bi 2 O 3 and Cu 2 S which dissolve progressively in solution in order to further precipitate into the oxychalcogenide phase.…”

A Review on Cu<SUB>2</SUB>O and Cu<SUP>I</SUP>-Based <I>p</I>-Type Semiconducting Transparent Oxide Materials: Promising Candidates for New Generation Oxide Based Electronics

“…5 Therefore, these types of layered-structured p-TCOs are inherently providing the anisotropic environment to the charge carriers and phonons to have suppressed scattering, and hence better thermoelectric properties. 281 282 Apart from photovoltaic, transparent electronic, vacuum microelectronic and thermoelectric related applications, Cu I -based p-types oxides are reported to have some very interesting and diverse properties and applications in magnetic, catalytic, photocatalytic, photoelectrochemical, gas sensing, superconducting, hydrogen generation and self-cleaning [283][284][285][286][287][288][289][290][291][292][293][294][295][296][297][298][299][300][301] properties. Therefore, it will not be an exaggeration to say that next decade will see the renaissance of Cu I -based p-type oxides and p-TCOs for various novel technological applications.…”

Synthesis of light‐coloured nanoparticles of wide band gap p‐type semiconductors CuGaO2 and LaOCuS by low temperature hydro/solvothermal processes

“…In order to hinder the formation of lanthanum hydroxides we therefore tried to synthesize LaOCuS nanoparticles using a low temperature solvothermal route ( i.e . under autogenous pressure at low temperature with a non aqueous solvent) 13. We choose ethylene diamine (en) as solvent owing to its concomitant ability to dissolve elemental sulphur and to favour the stabilization of Cu + cations due to its reducing character.…”