The effect of bismuth substitution for lead at concentrations of 0.5-5 % on absorption and luminescence of dispersed CsPbBr₃ perovskites has been studied by means of diffuse reflectance spectroscopy and luminescence techniques, respectively. The considerable red shift of the absorption edge of CsPbBr₃ has been observed, as well as a decrease in exciton luminescence with increasing dopant concentration.