Structural and optical properties of metallic doped palladium sulfide thin films

Ede, Margareth N.; Ugwoke, Dennis U.; Ighodalo, Kester O.; Aslam, Saad; Mustafa, Faiza; Hussain, Tajammal; Ahmad, Muhammad Ashfaq

doi:10.1016/j.ijleo.2018.11.033

Cited by 3 publications

(1 citation statement)

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“…[ 9–12 ] Palladium sulphide (PdS) is a noble metal compound with bandgap energies between 1.5 and 2 eV, making it a promising candidate in photonics and optical sensing applications originating from their intrinsic optical properties particularly the surface plasmon resonance. [ 13–15 ] However, it has attracted less attention in its 2D planar form owing to its nonlayered crystal feature. Up to date, 0D particle form has been extensively achieved for PdS, mostly involving a mixture of at least two elements under high calcination temperatures.…”

Section: Introductionmentioning

confidence: 99%

2D Palladium Sulphate for Visible‐Light‐Driven Optoelectronic Reversible Gas Sensing at Room Temperature

Alkathiri

Zhang

et al. 2021

Small Science

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2D metal sulphides (MSs) have attracted enormous amounts of attention in developing high‐performance gas sensors. 2D noble metal sulphides and their derivatives, however, have been less studied due to their predominant nonlayered crystal structures for inefficient exfoliation, despite their surface and peculiar optoelectronic properties. Herein, we successfully synthesize 2D palladium sulphate (PdSO4) from palladium sulphide (PdS) bulk crystals by liquid‐phase exfoliation, in which the presence of oxygen species in the exfoliation solvent plays a key role in the sulphate transformation. Ultrathin 2D PdSO4 planar nanosheets, with thicknesses of ≈3 nm and submicrometer lateral dimensions, exhibit a broad absorption across the visible spectrum, a narrow bandgap of ≈1.35 eV, and a nanosecond scaled long exciton lifetime, which are all suitable for the visible‐light‐driven optoelectronic gas sensing applications. The 2D PdSO4‐based sensor demonstrates a reversible, selective, and sensitive response toward ppb‐leveled NO2 gas at blue light irradiation, featuring a response factor of ≈3.28% for 160 ppb NO2, a low limit of detection of 1.84 ppb, and a > 3 times response factor enhancement over other gases. Herein, the possibility of realizing 2D ultrathin noble metal sulphide compounds from their nonlayered crystal structures and strong potentials in developing high‐performance chemical sensors is explored.

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Section: Introductionmentioning

confidence: 99%