Synthesis and optical properties of CsPbI3 perovskite nanocrystals in borosilicate glass doped with Nd3+ ions

We investigated the optical properties of the borosilicate glass matrix system doped with Nd3+ ions and incorporated with CsPbI3 nanocrystals, produced by the fusion method. The energy transfer process from CsPbI3 nanocrystals to Nd3+ ions was analyzed from optical absorption and photoluminescence spectra overlap. Transmission electron microscopy images show that the nanocrystals grown in the borosilicate glass matrix had an average size of 9.5 nm and interplanar distances of d015 = 0.280 nm, which corresponds to the CsPbI3 semiconductor. X-ray diffraction (XRD) and selected area of electron diffraction (SAED) patterns show the peaks associated with the (015) and (020) planes, characteristic of the orthorhombic crystal structure. An emission band was observed at 888 nm (transition 4F3∕2 → 4I9∕2) under excitation of 532 nm, attributed by the Nd3+ ion, in which the photoluminescence lifetime as a function of temperature (296 to 600 K) was obtained.