Effect of Аnnеаling Tеmреrаturе and Conditions on the Photoluminescence Properties of ZnO/P3HT Hеtеrоstruсturеs

Zinc oxide nanocrystals were synthesized in aqueous solutions at low temperatures, and their surface was coated with a thin film of the electrically conductive polymer poly(3-hexylthiophene) (P3HT) to form hybrid heterostructures. The synthesized nanostructures and hybrid heterostructures formed on their basis were subjected to heat treatment at various temperatures both in air and in vacuum (10–5 Pa). Changes in the optical properties of nanostructures and hybrid heterostructures after heat treatment were studied. Upon annealing of ZnO/P3HT heterostructures in air, it was found that the emission band corresponding to 0-0 transitions dominates in the photoluminescence spectra. When the heterostructures were annealed in vacuum, the photoluminescence spectra were dominated by the emission band corresponding to defects in the ZnO and polymer. These emission bands showed that heat treatment of heterostructures based on ZnO nanocrystals in air and vacuum at 100°C resulted in an optimal state of the interface layer between ZnO and P3HT polymer.

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