Stock material or miscellaneous articles – Composite – Of b – n – p – s – or metal-containing material
Patent
1989-03-13
1991-07-16
Lesmes, George F.
Stock material or miscellaneous articles
Composite
Of b, n, p, s, or metal-containing material
428432, 428469, 4284723, 427 78, 427109, B32B 904
Patent
active
050324721
ABSTRACT:
High phosphorus polyphosphides, namely MP.sub.x, where M is an alkali metal (Li, Na, K, Rb, and Cs) or metals mimicking the bonding behavior of an alkali metal, and x=7 to 15 or very much greater than 15 (new forms of phosphorus) are useful semiconductors in their crystalline, polycrystalline and amorphous forms (boules and films). MP.sub.15 appears to have the best properties and KP.sub.15 is the easier to synthesize. P may include other pnictides as well as other trivalent atomic species. Resistance lowering may be accomplished by doping with Ni, Fe, Cr, and other metals having occupied d or f outer electronic levels; or by incorporation of As and other pnictides. Top contacts forming junction devices doped with Ni and employing Ni as a back contact comprise Cu, Al, Mg, Ni, Au, Ag, and Ti. Photovoltaic, photoresistive, and photoluminescent devices are also disclosed. All semiconductor applications appear feasible.
These semiconductors belong to the class of polymer forming, trivalent atomic species forming homatomic, covalent bonds having a coordination number slightly less than 3. The predominant local order appears to be all parallel pentagonal tubes in all forms, including amorphous, except for the monoclinic and twisted fiber allotropes of phosphorus.
Large crystal monoclinic phosphorus (a birefringent material) in two habits, a twisted fiber phosphorus allotrope and a star shaped fibrous high phosphorus material are also disclosed.
Single and multiple source vapor transport, condensed phase, melt quench, flash evaporation, chemical vapor deposition, and molecular flow deposition may be employed in synthesizing these materials. Vapor transport may be employed to purify phosphorus.
REFERENCES:
patent: 4509066 (1985-04-01), Schachter et al.
patent: 4567503 (1986-01-01), Olezo et al.
patent: 4596721 (1986-06-01), Brock et al.
patent: 4618345 (1986-10-01), Tuck et al.
patent: 4649024 (1987-03-01), Brock et al.
patent: 4696828 (1987-09-01), Schachter et al.
Baumann John A.
Kuck Mark A.
Michel Christian G.
Raccah Paul M.
Schachter Rozalie
Davis IV F. Eugene
Gray Jill M.
Lesmes George F.
Stauffer Chemical Company
LandOfFree
Films of catenated phosphorus materials, their preparation and u does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Films of catenated phosphorus materials, their preparation and u, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Films of catenated phosphorus materials, their preparation and u will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-130851