A composition useful for forming solid-state device structures, said composition comprising: a solvent system; an organometallic oligomer dissolved or dispersed in said solvent system, said organometallic oligomer comprising recurring monomers having the formula wherein: n is 3-10; each M is individually selected from the group consisting of Groups 3-5 and 13-15 metals other than silicon and having a combining valence of greater than +2; and each R 1 is individually selected from the group consisting of alkoxys, alkyloxyalkoxys, beta-diketones, beta-diketonates, and alkanolamines; and at least 3% by weight of an organic polymer or oligomer having a weight-average molecular weight of at least 150 g/mol, said percentage by weight being based upon the total weight of the composition taken as 100% by weight, said organic polymer or oligomer comprising a functional group selected from the group consisting of chelating moieties selected from the group consisting of and wherein: m is 1 or 2; when m is 2, then x is 0; each R 6 is individually selected from the group consisting of hydrogen and methyl groups; and each R 7 is individually selected from the group consisting of hydrogen and alkyls; and wherein said composition can be heated to a temperature of at least 150 °C for at least 3 minutes to yield a cured layer that is a metal oxide and organic hybrid film having a refractive index of at least 1.65 at a wavelength of 633 nm and at a film thickness of 0.5 μm. a solvent system; an organometallic oligomer dissolved or dispersed in said solvent system, said organometallic oligomer comprising recurring monomers having the formula wherein: n is 3-10; each M is individually selected from the group consisting of Groups 3-5 and 13-15 metals other than silicon and having a combining valence of greater than +2; and each R 1 is individually selected from the group consisting of alkoxys, alkyloxyalkoxys, beta-diketones, beta-diketonates, and alkanolamines; and n is 3-10; each M is individually selected from the group consisting of Groups 3-5 and 13-15 metals other than silicon and having a combining valence of greater than +2; and each R 1 is individually selected from the group consisting of alkoxys, alkyloxyalkoxys, beta-diketones, beta-diketonates, and alkanolamines; and at least 3% by weight of an organic polymer or oligomer having a weight-average molecular weight of at least 150 g/mol, said percentage by weight being based upon the total weight of the composition taken as 100% by weight, said organic polymer or oligomer comprising a functional group selected from the group consisting of chelating moieties selected from the group consisting of and wherein: m is 1 or 2; when m is 2, then x is 0; each R 6 is individually selected from the group consisting of hydrogen and methyl groups; and each R 7 is individually selected from the group consisting of hydrogen and alkyls; and wherein said composition can be heated to a temperature of at least 150 °C for at least 3 minutes to yield a cured layer that is a metal oxide and organic hybrid film having a refractive index of at least 1.65 at a wavelength of 633 nm and at a film thickness of 0.5 μm. m is 1 or 2; when m is 2, then x is 0; each R 6 is individually selected from the group consisting of hydrogen and methyl groups; and each R 7 is individually selected from the group consisting of hydrogen and alkyls; and wherein said composition can be heated to a temperature of at least 150 °C for at least 3 minutes to yield a cured layer that is a metal oxide and organic hybrid film having a refractive index of at least 1.65 at a wavelength of 633 nm and at a film thickness of 0.5 μm.