Multicolor Emission of Small Molecule-Based Amorphous Thin Films and Nanoparticles with a Single Excitation Wavelength

Small molecule-based amorphous materials involving unsymmetrical triarylamines exhibit multicolor emission as transparent thin films and nanoparticles under single UV wavelength excitation. Tuning of the emission originally stems from combined interbranch energy transfer and intramolecular charge transfer leading to blue to red outputs in the solid state.