Comparative studies of optical absorption, photoluminescence and EPR spectra of PbMnI2 bulk layers and nanocrystals - A. I. Savchuk; I. D. Stolyarchuk; O. A. Savchuk; O. A. Shporta; I. Stefaniuk; I. Rogalska; E. Sheregii (Semiconductor Physics, Quantum Electronics and Optoelectronics, 2014)