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Interface polarization in heterovalent core-shell nanocrystals
- Source :
- Nature materialsReference. 21(2)
- Publication Year :
- 2020
-
Abstract
- The potential profile and the energy level offset of core–shell heterostructured nanocrystals (h-NCs) determine the photophysical properties and the charge transport characteristics of h-NC solids. However, limited material choices for heavy metal-free III-V–II-VI h-NCs pose challenges in comprehensive control of the potential profile. Herein, we present an approach to such a control by steering dipole densities at the interface of III-V–II-VI h-NCs. The controllable heterovalency at the interface is responsible for interfacial dipole densities that result in the vacuum-level shift, providing an additional knob for the control of optical and electrical characteristics of h-NCs. The synthesis of h-NCs with atomic precision allows us to correlate interfacial dipole moments with the NCs’ photochemical stability and optoelectronic performance. Controlled synthesis of heterostructured III-V–II-VI nanocrystals shows that dipole moments formed at the core–shell interface can tune the optoelectronic properties of these nanomaterials and their performance in light-emitting devices.
Details
- ISSN :
- 14764660
- Volume :
- 21
- Issue :
- 2
- Database :
- OpenAIRE
- Journal :
- Nature materialsReference
- Accession number :
- edsair.doi.dedup.....e35878f866d09c4606bcfa339531864b