Heterocyclic semiconductor precursor compounds, compositions containing the same, and methods of making such compounds and compositions
View Patent ↗Heterocyclosilane compounds and methods for making the same. Such compounds (and/or ink compositions containing the same) are useful for printing or spin coating a doped silane film onto a substrate that can easily be converted into a doped amorphous silicon film (that may also be hydrogenated to some extent) or doped polycrystalline semiconductor film suitable for electronic devices. Thus, the present invention advantageously provides commercial qualities and quantities of doped semiconductor films from a “doped liquid silicon” composition.
1. An ink composition comprising:
a) a cyclic compound of the formula (AR 2 ) n (DR 1 ) m , where n is from 3 to 7, m is 1 or 2, n+m is 4 to 8, each of the n instances of A is independently Si or Ge, each of the 2n instances of R is aryl or halogen (and for each A, one R may be hydrogen), each of the m instances of D is Sb, As, P or B, when each of the 2n instances of R is aryl, each of the m instances of R 1 is alkyl, aralkyl, or AR 2 3 , where R 2 is hydrogen, aryl, or A y H 2y+1 (where y is an integer of 1 to 4), and when any of the 2n instances of R is other than aryl, each of the m instances of R 1 is alkyl, aryl, aralkyl, or AR 2 3 , where R 2 is hydrogen, aryl, or A y H 2y+1 (where y is an integer of 1 to 4); and
b) a solvent in which the cyclic compound is soluble.
2. The ink composition of claim 1 , further comprising a silane.
3. The ink composition of claim 2 , wherein said silane is a cyclosilane.
4. The ink composition of claim 2 , consisting essentially of said compound, said solvent, and said silane.
5. The ink composition of claim 4 , wherein said compound is present in an amount of from 0.00001 to 50 vol % of said ink composition, and said silane is present in an amount of from 0.1 to 50 vol % of said ink composition.
6. The ink composition of claim 1 , wherein said solvent is selected from the group consisting of alkanes, substituted alkanes, cycloalkanes, substituted cycloalkanes, arenes, substituted arenes, and (cyclic) siloxanes.
7. The ink composition of claim 1 , wherein A is Si.
8. The ink composition of claim 7 , wherein said compound is monocyclic and m is 1.
9. A cyclic compound of the formula (AR 2 ) n (DR 1 ) m , where n is from 3 to 7, m is 1 or 2, n+m is 4 to 8, each of the n instances of A is independently Si or Ge, each of the 2n instances of R is aryl or halogen (and for each A, one R may be hydrogen), each of the m instances of D is Sb, As, P or B, when each of the 2n instances of R is aryl, each of the m instances of R 1 is alkyl, aralkyl, or AR 2 3 , where R 2 is hydrogen, alkyl, aryl, aralkyl, or A y H 2y+1 (where y is an integer of 1 to 4), and when any of the 2n instances of R is other than aryl, each of the m instances of R 1 is alkyl, aryl, aralkyl, or AR 2 3 , where R 2 is hydrogen, aryl, or A y H 2y+1 (where y is an integer of 1 to 4).
10. The compound of claim 9 , wherein A is Si.
11. The compound of claim 9 , wherein said compound is monocyclic and m is 1.
12. The compound of claim 11 , wherein at least one R on each instance of A is aryl.
13. The compound of claim 11 , wherein m is 1 and D is P or B.
14. The compound of claim 11 , wherein n is 4 to 6.
15. The compound of claim 11 , wherein R is C 6 -C 10 aryl.
16. The compound of claim 9 , wherein R 1 is C 1 -C 6 alkyl, C 6 -C 12 aryl, SiH 3 , or Si(SiH 3 ) 3 .
17. The compound of claim 16 , wherein R 1 is isopropyl, t-butyl, t-hexyl, phenyl, α-naphthyl, β-naphthyl, tolyl, xylyl, cymyl, t-butylphenyl, SiH 3 , or Si(SiH 3 ) 3 .
18. The compound of claim 9 , wherein R is Cl or Br.