Patent ID: 8840857

Claim:
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.