2015
DOI: 10.1116/1.4930161
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Atomic layer deposition of molybdenum oxide from (NtBu)2(NMe2)2Mo and O2 plasma

Abstract: Molybdenum oxide (MoOx) films have been deposited by atomic layer deposition using bis(tert-butylimido)-bis(dimethylamido)molybdenum and oxygen plasma, within a temperature range of 50–350 °C. Amorphous film growth was observed between 50 and 200 °C at a growth per cycle (GPC) around 0.80 Å. For deposition temperatures of 250 °C and higher, a transition to polycrystalline growth was observed, accompanied by an increase in GPC up to 1.88 Å. For all deposition temperatures the O/Mo ratio was found to be just bel… Show more

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Cited by 120 publications
(90 citation statements)
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“…All of the results just mentioned were achieved using thermally evaporated MoO x . Low-temperature ALD of MoO x has also been demonstrated and is particularly promising for applications in SHJ solar cells due to its scalability and lowtemperature processing compatibility with a-Si:H passivation layers [95], [108]. However, so far, evaporated MoO x has been shown to yield a larger amount of band bending than ALD MoO x and thus an enhanced hole selectivity [109], [110].…”
Section: B Transition Metal Oxidesmentioning
confidence: 99%
“…All of the results just mentioned were achieved using thermally evaporated MoO x . Low-temperature ALD of MoO x has also been demonstrated and is particularly promising for applications in SHJ solar cells due to its scalability and lowtemperature processing compatibility with a-Si:H passivation layers [95], [108]. However, so far, evaporated MoO x has been shown to yield a larger amount of band bending than ALD MoO x and thus an enhanced hole selectivity [109], [110].…”
Section: B Transition Metal Oxidesmentioning
confidence: 99%
“…The Mo (W) precursor employed was [(NtBu) 2 (NMe 2 ) 2 Mo] ([(NtBu) 2 (NMe 2 ) 2 W]), (98%, Strem Chemicals) and was contained in a stainless-steel canister which was heated to 50°C. At this temperature, the vapor pressure of the precursor is reported to be 0.13 Torr [38]. The delivery lines were kept at 90°C to avoid condensation of the precursor while the reactor walls were heated to 50°C.…”
Section: Thin Film Growthmentioning
confidence: 99%
“…This is not uncommon for ALD, and enhanced GPC values on crystalline surfaces have for example also been observed for MoOx and TiO2. [21][22][23] In fact, from AFM (Figures S1 and S2 in the supplementary material) it is deduced that the crystallites can protrude up to ~25 nm from the surface. Since the film is 75 nm thick, this suggests an enhancement in GPC of at least 33% on the crystalline surface, if the crystallites were to nucleate directly at the start of the film deposition.…”
Section: A Influence Of the Deposition Temperature On Film Crystallimentioning
confidence: 99%