Studies of the thermal decomposition of some diselenocarbamato complexes of cadmium or zinc: molecular design for the deposition of MSe films by CVD

Deposition of II‐VI Thin Films by LP‐MOCVD Using Novel Single‐Source Precursors

“…[16] Asymmetrical alkyl substituents as in [M(E 2 CNMeHex) 2 ] (M ϭ Cd II , Zn II and E ϭ S, Se) which were originally introduced in order to increase volatility and have been successfully used to deposit IIϪVI films (including ZnSe and CdSe) by low pressure metal-organic chemical vapour deposition (LP-MOCVD). An investigation into decomposition mechanisms by gas chromatography mass spectroscopy (GC-MS) and electron impact mass spectroscopy (EI-MS) showed that the deposition of selenium during growth is inhibited in such compounds.…”

“…An investigation into decomposition mechanisms by gas chromatography mass spectroscopy (GC-MS) and electron impact mass spectroscopy (EI-MS) showed that the deposition of selenium during growth is inhibited in such compounds. [16] We have recently identified a new class of metal-organic single-source precursors based on bis(diphenylphosphanylamine) e.g., [ …”

Synthesis and Characterisation of the First Cyanodiselenoimidocarbonate [C2N2Se2]2− Complexes

“…There has been significant interest in ZnSe and CdSe semiconductors in photovoltaic devices because of their intermediate energy bandgap. [13] Hence organometallic compounds such as cadmium and zinc diselenocarbamato complexes [14] and selenoimidophosphonates [13] have been investigated as single-source precursors for deposition of these semiconductor materials. Other well-established selenium donor ligands include the selenoethers [15Ϫ18] and the pseudohalide selenocyanate.…”

Organometallic and Metallo-Organic Precursors for Nanoparticles

“…Bis(diethyldithiocarbamato)cadmium compounds have the advantage of stability for years but the yield and the quality of nanoparticles was not good. However O'Brien et al developed some novel air-stable precursors based on bis(methy-n-hexyl-diselenocarbamato)zinc or cadmium which decompose cleanly in MOCVD to selenides [101][102][103]. A series of other unsymmetrical dithio-and selenocarmates were also synthesized to be used as single-source precursors for the deposition of nanoparticles.…”

“…Since dithio-and selenocarbamates and their derivatives are used so widely in the deposition of thin films and nanoparticles that a mechanistic study of their decomposition behavior was carried out by O'Brien et al [107]. Wold et al [78] studied the decomposition products of Zn(S 2 CNEt 2 ) 2 using gas-chromatography mass spectrometry (GC-MS) and their reported deposition path shows clean elimination of ZnS from the precursor (Eqs.…”