화학공학소재연구정보센터
Chemical Physics Letters, Vol.645, 192-194, 2016
Temperature dependence of properties of Mn-doped nanocrystals with different binding symmetry
We report the temperature dependence of photoluminescent properties of Mn-doped nanocrystals (NCs) with different binding symmetry. The photoluminescence peaks of Mn2+ ions shift to shorter wavelength with increasing temperatures, resulting from the reduction of crystal field. Further evidence for temperature-dependent crystal field variety is demonstrated by electronic paramagnetic resonance (EPR) spectra. Additionally, the inflexion temperature of the excited state lifetimes increases from 170 K (Sample I) to 220K (Sample IV), which is speculated to be resulted from the easily affected wave function overlap due to thermal lattice expansion in more symmetrical binding Mn-doped NCs. (C) 2016 Elsevier B.V. All rights reserved.