title: Pressure dependence of Mn2+ fluorescence in MnS/ZnS core-shell quantum dots.
abstract: The high pressure photoluminescence spectra of MnS/ZnS core-shells quantum dots were measured using a diamond anvil cell up to 9.4 GPa. Orange emission at 590 nm from the 4T1 --> 6A1 transition of Mn2+ ions was observed. The Mn2+ emission shifted to red with increasing pressure. The experimental pressure coefficient was -48.3 meV/GPa, which is agreement with the calculated value based on the crystal field theory. The redshift is attributed to the increase of crystal field strength and decrease of Racah parameters during compression.
authors.affiliation: Hefei National Laboratory for Physical Sciences at Microscale and Department of Physics, University of Science and Technology of China, Hefei, Anhui 230026, China.
authors.forename: R C
authors.initials: RC
authors.lastname: Dai
authors.forename: J J
authors.initials: JJ
authors.lastname: Zheng
authors.forename: C C
authors.initials: CC
authors.lastname: Zhang
authors.forename: Z M
authors.initials: ZM
authors.lastname: Zhang
authors.forename: Z J
authors.initials: ZJ
authors.lastname: Ding