A Simple Method for Incorporating Lead Sulfide Nanoparticles Directly in Poly (3-hexyl thiophene) (P3HT) Matrix

In the present study, nanoparticles (NPs) of lead sulfide (PbS) have been directly incorporated in poly (3- hexylthiophene) (P3HT) matrix without any surfactant. The X-Ray diffraction and absorption spectrum confirm the incorporation of PbS NPs in P3HT matrix. The strong and sharp diffraction peaks indicate that the as-prepared PbS NPs are crystalline. The absorption spectrum of P3HT in solution shows a characteristic wide peak at 451 nm. The extension of the blend absorption beyond the main polymer exciton peak at ca. 451 nm is due to the presence of PbS nanoparticles. The broad photoluminescence in the visible spectral region from the P3HT-PbS blend is observed, which is very much dependent on the PbS concentration.