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Role of Cation-Anion Organic Ligands for Optical Properties of Fully Inorganic Perovskite Quantum Dots

Published online by Cambridge University Press:  25 July 2018

Aaron Forde ,
Talgat Inerbaev  and
Dmitri Kilin Open the ORCID record for Dmitri Kilin [Opens in a new window]
Aaron Forde
Affiliation:
Department of Materials and Nanotechnology, North Dakota State University, Fargo ND 58108
Talgat Inerbaev
Affiliation:
L.N. Gumilyov Eurasian National University, Astana 010008, Kazakhstan
Dmitri Kilin*
Affiliation:
Department of Chemistry and Biochemistry, North Dakota State University, Fargo, North Dakota 58108, USA
*
*(Email: Dmitri.Kilin@usd.edu)
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Abstract

Application of lead-halide perovskite nanostructures for photovoltaic and light emitting applications depends on fashion of the surface termination. The reasonable choice of surface ligands for perovskite nanostructures prevent formation of trap states and contribute to chemical stability, wide opening of the bandgap, and intensity of absorption and photoluminescence of perovskite nanostructures. This work provides atomistic arguments for dual ligand protocol of surface passivation of fully inorganic perovskite quantum dots with fully organic ligands being a mix of cations (ethyl-ammonium) and anions (acetic) in nearly equal proportions. Computed binding energies of either individual ligands or anion-cation pairs demonstrate high stability in comparison to thermal energy and are concluded to be favourable choice in synthesis of colloidal perovskite quantum dots for light emitting applications.

Keywords

perovskitesquantum dotspectroscopysurface chemistryelectronic structure
Type
Articles
Information
MRS Advances , Volume 3 , Issue 55: Energy Materials and Technologies , 2018 , pp. 3255 - 3261
Copyright
Copyright © Materials Research Society 2018 

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References

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