Nanocomposite formulations for optical applications

1. A scattering formulation comprising:

a binder formulation, and

scattering particles, wherein

the binder formulation comprises a dispersion of at least partially capped metal oxide nanocrystals and an acrylic polymer comprising bisphenol A glycerolate dimethacrylate,

optionally further comprising a solvent, a curing agent or an antioxidant, and wherein the average size of said scattering particles is in the range of 50 nm-2 μm, 50-100 nm, 100-200 nm, 200-300 nm, 300-400 nm, 400-500 nm, 500-600 nm, 600-700 nm, 700-800 nm, 800-900 nm, 900 nm to 1 μm, 1-1.5 μm, or 1.5-2 μm, and

wherein the scattering particles are present in an amount of greater than 5 wt. % to 40 wt. %, based on total weight of the scattering formulation, and

wherein the acrylic polymer of the formulation does not contain benzyl methacrylate (BMA) or trimethylolpropane triacrylate (TMPTA).

2. The scattering formulation of claim 1 , wherein the scattering formulation is storage stable for at least 1 week, 2 weeks, 3 weeks, 4 weeks, 3 months, at least 5 months, at least 6 months, at least 7 months, at least 8 months, at least 9 months, at least 10 months, at least 11 months, at least 1 year, at least 2 years or at least 3 years, when said scattering formulation is stored at a temperature in the range of 18-25° C. without deliberate shaking or mixing of the scattering formulation such that the weight percentage of scattering particles in a sample from the upper third of a stored sample of the scattering formulation changes by less than 1%, 1-2%, 2-3%, 3-4%, 4-5%, 5-7%, 7-10%, 10-15%, 15-20%, 20-25%, 25-30%, or 30-35% over the storage time.

3. A nanocomposite film comprising the scattering formulation of claim 1 which is at least partially cured.

4. The nanocomposite film of claim 3 , wherein the nanocomposite film has a thickness of at least 1 μm and a surface roughness of 5-4 nm, or 4-3 nm, 3-2 nm, 2-1 nm, 1-0.5 nm, or 0.5-0.1 nm.

5. A scattering film comprising the scattering formulation of claim 1 which is at least partially cured, and wherein the at least partially cured scattering formulation forms a nanocomposite binder having a refractive index of between 1.6-1.62, 1.62-1.64, 1.64-1.66, 1.66-1.68, 1.68-1.70, 1.70-1.72, 1.72-1.74, 1.76-1.78, 1.78-1.80, 1.80-1.82, 1.82-1.84, 1.84-1.86, 1.86-1.88, or 1.88-1.90 when measured at 400 nm.

6. An OLED device comprising the nanocomposite film of claim 3 .

7. An OLED device comprising the scattering film of claim 5 .