  The present paper deals with the results of a research work on the optical
properties of colloidal InP/ZnS nanocrystals stabilized with a
heterobifunctional polyvinylpyrrolidone polymer. We have analyzed the
absorption and photoluminescence spectra of the samples as solutions with
various concentrations and deposited films, as well as the patterns of their
temperature changes in the range of 6.5 - 296 K. An inhomogeneous broadening of
exciton optical bands has been observed to be related to a wide distribution of
nanocrystals in size. A temperature shift of the exciton absorption and
emission maxima has been found to be due to the interaction with acoustic
phonons. It has been shown that the quenching of defect-related luminescence is
carried out through local energy levels of dangling bonds of phosphorus atoms
involved at the core-shell interface, and the temperature stability of exciton
emission is determined by the thickness of the ZnS shell.
