Compressed fluid formulation containing hole transporting material

An imaging device comprising a mixture of a solvent and a functional material;

• wherein the solvent is a compressed fluid and the functional material is a hole transporting material which is dissolved, dispersed and/or solubilized in the compressed fluid;
• wherein the mixture is thermodynamically stable or thermodynamically metastable or both;
• wherein the functional material is solvent-free upon deposition on a substrate;
• and.
• wherein the functional material forms a solid film upon deposition on the substrate.

A display device comprising a mixture of a solvent and a functional material;

• wherein the solvent is a compressed fluid and the functional material is a hole transporting material which is dissolved, dispersed and/or solubilized in the compressed fluid;
• wherein the mixture is thermodynamically stable or thermodynamically metastable or both;
• wherein the functional material is solvent-free upon deposition on a substrate;
• and
• wherein the functional material forms a solid film upon deposition on the substrate.