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Manganese Doping Promotes the Synthesis of Bismuth-based Perovskite Nanocrystals While Tuning Their Band Structures

Liu, Maning LU orcid ; Ali-Löytty, Harri ; Hiltunen, Arto ; Sarlin, Essi ; Qudsia, Syeda ; Smått, Jan Henrik ; Valden, Mika and Vivo, Paola (2021) In Small 17(19).
Abstract

The doping of halide perovskite nanocrystals (NCs) with manganese cations (Mn2+) has recently enabled enhanced stability, novel optical properties, and modulated charge carrier dynamics of the NCs host. However, the influence of Mn doping on the synthetic routes and the band structures of the host has not yet been elucidated. Herein, it is demonstrated that Mn doping promotes a facile, safe, and low-hazard path toward the synthesis of ternary Cs3Bi2I9 NCs by effectively inhibiting the impurity phase (i.e., CsI) resulting from the decomposition of the intermediate Cs3BiI6 product. Furthermore, it is observed that the deepening of the valence band level of the host NCs upon... (More)

The doping of halide perovskite nanocrystals (NCs) with manganese cations (Mn2+) has recently enabled enhanced stability, novel optical properties, and modulated charge carrier dynamics of the NCs host. However, the influence of Mn doping on the synthetic routes and the band structures of the host has not yet been elucidated. Herein, it is demonstrated that Mn doping promotes a facile, safe, and low-hazard path toward the synthesis of ternary Cs3Bi2I9 NCs by effectively inhibiting the impurity phase (i.e., CsI) resulting from the decomposition of the intermediate Cs3BiI6 product. Furthermore, it is observed that the deepening of the valence band level of the host NCs upon doping at Mn concentration levels varying from 0 to 18.5% (atomic ratio) with respect to the Bi content. As a result, the corresponding Mn-doped NCs solar cells show a higher open-circuit voltage and longer electron lifetime than those employing the undoped perovskite NCs. This work opens new insights on the role of Mn doping in the synthetic route and optoelectronic properties of lead-free halide perovskite NCs for still unexplored applications.

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author
; ; ; ; ; ; and
publishing date
type
Contribution to journal
publication status
published
subject
keywords
band structure, lead-free perovskite nanocrystals, manganese doping, time-resolved photoluminescence, transient open-circuit voltage decay
in
Small
volume
17
issue
19
article number
2100101
pages
10 pages
publisher
John Wiley & Sons Inc.
external identifiers
  • pmid:33792184
  • scopus:85103952672
ISSN
1613-6810
DOI
10.1002/smll.202100101
language
English
LU publication?
no
id
adbf7eeb-7997-436b-bb25-01c827aab689
date added to LUP
2023-08-24 12:28:09
date last changed
2024-04-20 02:34:31
@article{adbf7eeb-7997-436b-bb25-01c827aab689,
  abstract     = {{<p>The doping of halide perovskite nanocrystals (NCs) with manganese cations (Mn<sup>2+</sup>) has recently enabled enhanced stability, novel optical properties, and modulated charge carrier dynamics of the NCs host. However, the influence of Mn doping on the synthetic routes and the band structures of the host has not yet been elucidated. Herein, it is demonstrated that Mn doping promotes a facile, safe, and low-hazard path toward the synthesis of ternary Cs<sub>3</sub>Bi<sub>2</sub>I<sub>9</sub> NCs by effectively inhibiting the impurity phase (i.e., CsI) resulting from the decomposition of the intermediate Cs<sub>3</sub>BiI<sub>6</sub> product. Furthermore, it is observed that the deepening of the valence band level of the host NCs upon doping at Mn concentration levels varying from 0 to 18.5% (atomic ratio) with respect to the Bi content. As a result, the corresponding Mn-doped NCs solar cells show a higher open-circuit voltage and longer electron lifetime than those employing the undoped perovskite NCs. This work opens new insights on the role of Mn doping in the synthetic route and optoelectronic properties of lead-free halide perovskite NCs for still unexplored applications.</p>}},
  author       = {{Liu, Maning and Ali-Löytty, Harri and Hiltunen, Arto and Sarlin, Essi and Qudsia, Syeda and Smått, Jan Henrik and Valden, Mika and Vivo, Paola}},
  issn         = {{1613-6810}},
  keywords     = {{band structure; lead-free perovskite nanocrystals; manganese doping; time-resolved photoluminescence; transient open-circuit voltage decay}},
  language     = {{eng}},
  month        = {{05}},
  number       = {{19}},
  publisher    = {{John Wiley & Sons Inc.}},
  series       = {{Small}},
  title        = {{Manganese Doping Promotes the Synthesis of Bismuth-based Perovskite Nanocrystals While Tuning Their Band Structures}},
  url          = {{http://dx.doi.org/10.1002/smll.202100101}},
  doi          = {{10.1002/smll.202100101}},
  volume       = {{17}},
  year         = {{2021}},
}