Photovoltaic and optical properties of a polymer - PbS nanoparticles in polyvinyl alcohol (PVA) films and the effect of annealing in air at various temperatures on these properties are studied in the present work. In the range 1,0 - 3,7 eV, absorption spectra of PbS nanocomposite films are correctly fitted by 5 Gaussian bands peaking at 1,5, 1,84, 2,41, 3,06 and 3,58 eV. A characteristic feature of the films is the presence of green and blue luminescence with intensity maxima at 2,25 and 3,02 eV, respectively. The luminescence intensity strongly depends on the excitation energy and the annealing temperature in air. The highest intensity of the green luminescence is observed under the excitation with the 2,35 eV radiation, whereas the intensity of the blue luminescence peaks under the 3,46 eV excitation. After annealing at 370 K, the intensity of the green luminescence decreases a few times whereas the intensity of the blue emission increases.

• Луцик Петро Миколайович (фізико-математичні науки)
• Куценко Олександр Сергійович (1946–) (фізико-математичні науки)

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