28-11-2019 дата публикации
Номер: US20190362971A1
Принадлежит:
Embodiments of the present disclosure relate to forming a two-dimensional crystalline dichalcogenide by positioning a substrate in an annealing apparatus. The substrate includes an amorphous film of a transition metal and a chalcogenide. The film is annealed at a temperature from 500° C. to 1200° C. In response to the annealing, a two-dimensional crystalline structure is formed from the film. The two-dimensional crystalline structure is according to a formula MX, M includes one or more of molybdenum (Mo) or tungsten (W) and X includes one or more of sulfur (S), selenium (Se), or tellurium (Te). 1. A method for substrate processing , comprising:positioning a substrate in an annealing apparatus, wherein the substrate comprises an amorphous film of a transition metal and a chalcogenide;annealing the amorphous film at a temperature from 500° C. to 1200° C.; and{'sub': '2', 'forming, in response to the annealing, a two-dimensional crystalline structure from the amorphous film, wherein the two-dimensional crystalline structure is according to a formula MX, and wherein M comprises molybdenum (Mo) or tungsten (W) and X comprises sulfur (S), selenium (Se), or tellurium (Te).'}2. The method of claim 1 , wherein the substrate comprises a metal claim 1 , a semiconductor claim 1 , a polymer claim 1 , an inorganic oxide claim 1 , a metal oxide claim 1 , a metal sulfide claim 1 , a metal selenide claim 1 , an inorganic sulfide claim 1 , graphene claim 1 , an inorganic selenide claim 1 , or combinations thereof.3. The method of claim 1 , wherein the two-dimensional crystalline structure comprises a plurality of monolayers.4. The method of claim 1 , wherein the annealing further comprises annealing in an atmosphere comprising argon (Ar) and nitrogen (N).5. The method of claim 1 , wherein the annealing further comprises exposing the amorphous film to hydrogen sulfide (HS) and hydrogen selenide (HSe).6. The method of claim 1 , where the amorphous film comprises a thickness from 0.5 nm ...
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