Doping the Smallest Shannon Radii Transition Metal Ion Ni(II) for Stabilizing α-CsPbI3 Perovskite Nanocrystals

Behera, Rakesh Kumar ; Dutta, Anirban ; Ghosh, Dibyendu ; Bera, Suman ; Bhattacharyya, Sayan ; Pradhan, Narayan (2019) Doping the Smallest Shannon Radii Transition Metal Ion Ni(II) for Stabilizing α-CsPbI3 Perovskite Nanocrystals Journal of Physical Chemistry Letters, 10 (24). pp. 7916-7921. ISSN 1948-7185

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Official URL: http://doi.org/10.1021/acs.jpclett.9b03306

Related URL: http://dx.doi.org/10.1021/acs.jpclett.9b03306

Abstract

Red emitting α-CsPbI3 nanocrystals are highly phase sensitive to ambient exposure, and B-site doping with suitable cations is adopted as one of the most feasible approaches for their phase stability. There are several reports herein: Ni(II) ions having the smallest transition metal Shannon radii were explored for doping in these nanocrystals. This successfully stabilized the cubic phase and retained the intense emission of nanocrystals for nearly 2 months. Being the smallest ion, the halide octahedra in the perovskite lattice were expected to provide high restraint ability toward δ-CsPbI3. Comparing with postsynthesis iodide treatments, the importance of doping in high temperature reaction was discussed. Finally, these doped nanocrystals were explored for photovoltaic devices and showed comparable efficiency (9.1%) to different other similar doped nanocrystals. Hence, the finding reported here is a step forward for understanding the insights of phase stability of α-CsPbI3 perovskite nanocrystals.

Item Type:Article
Source:Copyright of this article belongs to American Chemical Society.
ID Code:121384
Deposited On:15 Jul 2021 11:47
Last Modified:15 Jul 2021 11:47

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