SCHEDULED MAINTENANCE
Highly effective nanosegregation of dual dopants in a micron-sized nanocluster-based semiconductor molecular single crystal for targeting white-light emission†
Abstract
Chemically co-doping a micron-sized semiconductor single crystal while simultaneously segregating different dopant types uniformly on a nanoscale is synthetically challenging, but often essential for preventing unwanted dopant-related interference that may hamper optic and magnetic applications. Here by starting from a unique molecular crystal composed of well-defined discrete supertetrahedral chalcogenide nanoclusters (NCs), we successfully realized highly effective nanosegregation of dual dopants (Cu and Mn) in Cd–In–S semiconductor crystals. Our method takes advantage of the intrinsic single vacancy at the core of NC that permits the trapping of only one dopant ion. Such single-ion trapping effectively precludes two dopant ions from residing in the same NC, allowing us to target single-crystal white-light emitter by eliminating possible interference between dopants. This new method for controlling the distribution of multiple dopants on a nanoscale provides a promising route to modify and tune optical and magnetic properties of large-sized semiconductor single crystals for use in integrated multifunctional devices.
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