Vacuum evaporating films of alkali metal polyphosphide
AssigneeStauffer Chemical Company
InventorsDavid G. Brock, John A. Baumann
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Abstract
Fine quality catenated phosphorus thin films are produced in a high vacuum evaporator. Heated tungsten wire crackers are provided above the phosphorus boat and below the substrates. Amorphous pure phosphorus shiny red films have been deposited on glass, metallized glass and GaP and exhibit an optical edge at 2.0 eV. Films of KP.sub.x where x is equal to 15 or greater than 15 are produced by utilizing a second baffled boat source containing the potassium graphite intercalate, KC.sub.8. Addition of a nickel evaporation source provides nickel-doped polyphosphide films.
Claims28
The method of forming an evaporated film of catenated phosphorus material comprising depositing such a film onto a substrate having a smooth surface in the presence of a phosphorus cracker and a heated alkali metal intercalate source.
Vacuum evaporating a film of an alkali metal polyphosphide onto a substrate having a smooth surface from a heated alkali metal intercalate source and a phosphorus source.
Vacuum evaporating a film of an alkali metal polyphosphide onto a substrate having a smooth surface in the presence of a phosphorus cracker from a heated alkali metal intercalate source.
The method of forming an evaporated film of MP.sub.x, where M is an alkali metal, and x ranges from 15 to infinity, inclusively, comprising depositing such a film onto a substrate in the presence of a phosphorus cracker.
Dependencies are inferred from the claim text.