title: Ultranarrow and widely tunable Mn2+-Induced photoluminescence from single Mn-doped nanocrystals of ZnS-CdS alloys.
abstract: Extensively studied Mn-doped semiconductor nanocrystals have invariably exhibited photoluminescence over a narrow energy window of width ≤150  meV in the orange-red region and a surprisingly large spectral width (≥180  meV), contrary to its presumed atomic-like origin. Carrying out emission measurements on individual single nanocrystals and supported by ab initio calculations, we show that Mn PL emission, in fact, can (i) vary over a much wider range (∼370  meV) covering the deep green--deep red region and (ii) exhibit widths substantially lower (∼60-75  meV) than reported so far, opening newer application possibilities and requiring a fundamental shift in our perception of the emission from Mn-doped semiconductor nanocrystals.
authors.affiliation: Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore 560012, India.
authors.forename: Abhijit
authors.initials: A
authors.lastname: Hazarika
authors.forename: Arunasish
authors.initials: A
authors.lastname: Layek
authors.forename: Suman
authors.initials: S
authors.lastname: De
authors.forename: Angshuman
authors.initials: A
authors.lastname: Nag
authors.forename: Saikat
authors.initials: S
authors.lastname: Debnath
authors.forename: Priya
authors.initials: P
authors.lastname: Mahadevan
authors.forename: Arindam
authors.initials: A
authors.lastname: Chowdhury
authors.forename: D D
authors.initials: DD
authors.lastname: Sarma