Aerosol-assisted CVD of cadmium diselenoimidodiphosphinate and formation of a new ⁱPr₂N₂P₃⁺ ion supported by combined DFT and mass spectrometric studies

Abstract

Aerosol-assisted chemical vapour deposition (AACVD) of Cd[(SeP i Pr2)2N]2 is shown to deposit cadmium selenide and/or cadmium phosphide on glass substrates, dependent upon the growth conditions. The phase, structure, morphology and composition of the films were characterised by X-ray powder diffraction (XRD), scanning electron microscopy, energy dispersive X-ray analysis and X-ray photoelectron spectroscopy. The XRD indicated an hexagonal phase for cadmium selenide, whilst cadmium phosphide was monoclinic. Pyrolysis gas chromatography-mass spectrometer and density functional theory were used to deduce a breakdown mechanism for the deposition that favoured the formation of a new aromatic i Pr2N2P3 + ion.

Aerosol-assisted chemical vapor deposition of MSe and MSSe thin films using zinc(ii) and cadmium(ii) single source precursors containing hybrid Se,X-PNC ligands

“…The coordination angles in 4 range from 101.18(8)1 to 116.42(6)1, with the Se-M-X bite angles being 105.06(5)1 and 106.81(5)1. In 5, the bite angle is 105.649 (19)1 with the largest angle being the Se1-M-Se2 angle (116.67(3)1). The zinc complex 4 had av.…”

“…Also, [MeCd( i Pr 2 P(Se)NP(Se) i Pr 2 )] 2 formed polycrystalline slightly selenium-rich CdSe films. 22 AACVD of [Cd( i Pr 2 P(Se)NP(X) i Pr 2 ) 2 ] (X = Se 19 and S 20 ) produced heterogeneous cadmium selenide, cadmium sulfide and/or cadmium phosphide films depending on the growth conditions, all presenting a phosphorous content between 22.5–29.8%. Other hybrid PNP complexes produced heterostructured films such as nickel selenide and/or nickel phosphide films, Ag 2 Se and Ni 0.51 Te.…”

“…17,18 O'Brien and coworkers pioneered the use of several SSPs for the synthesis of nanostructured metal chalcogenide materials. Zinc and cadmium complexes containing dichalcogenoimidodiphosphinates ([R 2 P(X)NP(Y)R 2 ] À or PNP ligands) 1,[19][20][21] have been used as SSPs for the deposition of binary and heterostructured thin films. Low-pressure MOCVD of [M(R 2 P(Se)NP(Se)R 2 ) 2 ] 1,21 (M = Zn, Cd; R = Ph, i Pr) produced hexagonal metal selenide films with an M : Se ratio ca.…”

Colloidal synthesis of metal chalcogenide nanomaterials from metal–organic precursors and capping ligand effect on electrocatalytic performance: progress, challenges and future perspectives

“…30 In contrast, AACVD of the same precursor produces cadmium selenide films contaminated with phosphorus. 31 Similarly, molecular precursors with the aromatic or bulky alkyl group result in carbon contamination of the metal chalcogenide films. For the deposition of films by vapour deposition routes, volatility of the precursor or good solubility in a suitable organic solvent is also required.…”