Tuning the Optical Properties of Cesium Lead Halide Perovskite Nanocrystals by Anion Exchange Reactions
Open accessAbstract
We demonstrate that, via controlled anion exchange reactions using a range of different halide precursors, we can finely tune the chemical composition and the optical properties of presynthesized colloidal cesium lead halide perovskite nanocrystals (NCs), from green emitting CsPbBr3 to bright emitters in any other region of the visible spectrum, and back, by displacement of Cl– or I– ions and reinsertion of Br– ions. This approach gives access to perovskite semiconductor NCs with both structural and optical qualities comparable to those of directly synthesized NCs. We also show that anion exchange is a dynamic process that takes place in solution between NCs. Therefore, by mixing solutions containing perovskite NCs emitting in different spectral ranges (due to different halide compositions) their mutual fast exchange dynamics leads to homogenization in their composition, resulting in NCs emitting in a narrow spectral region that is intermediate between those of the parent nanoparticles.
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Halide anion exchange in CsPbBr3 allows for seamless tuning of the bandgap in CsPb(Br:X)3 (X = Cl or I) nanocrystals, ranging from 1.88 to 3.03 eV.
“For instance, halide anion exchange in CsPbBr 3 allows for seamless tuning of the bandgap in CsPb(Br:X) 3 (X = Cl or I) nanocrystals, ranging from 1.88 to 3.03 eV [171].”
From Design Strategies and Emerging Applications of Perovskite-Based Sensors (2025) · cites this paper as [171]
The Results and Discussion (Figure 2A–B; page unavailable) show that anion exchange of CsPbBr3 with Cl or I tunes the nanocrystals’ photoluminescence from 1.88 to 3.03 eV. Those numbers are reported as emission energies, not measured bandgaps, so the claim’s numerical bandgap range is not established by this passage. (LLM, conf=0.86)
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“3 (X = Cl or I) nanocrystals, ranging from 1.88 to 3.03eV [171].”
Influential
- Authors
- Akkerman, Q. A., D’Innocenzo, V., Accornero, S., Scarpellini, A., Petrozza, A., Prato, M., & Manna, L.
- Affiliations
- Italian Institute of Technology (IT)
- Corresponding author
- Prato, Mirko
- Manna, Liberato
- Venue
- Journal of the American Chemical Society
- Publisher
- American Chemical Society (ACS)
- Published
- 2015-07-27
- Volume
- 137
- Issue
- 32
- Pages
- 10276-10281
- ISSN
- 0002-7863 (ISSN-L)
- 1520-5126
- PMC
- PMC4543997
- OpenAlex
- W998793280
- Cited by
- 2,197
- References
- 2
- Citations by year
- 2026: 114 · 2025: 142 · 2024: 188 · 2023: 173 · 2022: 243 · 2021: 226 · 2020: 251 · 2019: 268 · 2018: 257 · 2017: 185 · 2016: 135 · 2015: 14
- FWCI
- 94.99
- Type
- journal article
- Language
- en
- Open access
- hybrid
- doi.org
- Locations
- Journal of the American Chemical Society (publishedVersion, other-oa)
- Europe PMC (PubMed Central) (publishedVersion)
- PubMed Central (publishedVersion)
- PubMed (publishedVersion)
- Funders
- European Research Council (614897)
- Fondazione Cariplo (2013-0656)
- Topics
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Perovskite Materials and Applications
- Physical Sciences › Materials Science › Materials Chemistry › Quantum Dots Synthesis And Properties
- Physical Sciences › Materials Science › Materials Chemistry › Luminescence Properties of Advanced Materials
- Keywords
- cesium lead halide perovskite nanocrystals, anion exchange, optical property tuning, halide composition, colloidal nanocrystals, green emission
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