Cited by 704Perovskite Materials and Applications2D Materials and ApplicationsOrganic Electronics and Photovoltaics

The DOI matches its Crossref record; 42 of the 42 references it cites were found in a registry or an index.

Hot-carrier cooling and photoinduced refractive index changes in organic–inorganic lead halide perovskites

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Abstract

Metal-halide perovskites are at the frontier of optoelectronic research due to solution processability and excellent semiconductor properties. Here we use transient absorption spectroscopy to study hot-carrier distributions in CH 3 NH 3 PbI 3 and quantify key semiconductor parameters. Above bandgap, non-resonant excitation creates quasi-thermalized carrier distributions within 100 fs. During carrier cooling, a sub-bandgap transient absorption signal arises at ∼1.6 eV, which is explained by the interplay of bandgap renormalization and hot-carrier distributions. At higher excitation densities, a ‘phonon bottleneck’ substantially slows carrier cooling. This effect indicates a low contribution from inelastic carrier-impurity or phonon–impurity scattering in these polycrystalline materials, which supports high charge-carrier mobilities. Photoinduced reflectivity changes distort the shape of transient absorption spectra and must be included to extract physical constants. Using a simple band-filling model that accounts for these changes, we determine a small effective mass of m r =0.14 m o , which agrees with band structure calculations and high photovoltaic performance.

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  1. Hecht, E. Optics Addison Wesley (1987) .

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Metadata

Authors
Price, M. B., Butkus, J., Jellicoe, T. C., Sadhanala, A., Briane, A., Halpert, J. E., Broch, K., Hodgkiss, J. M., Friend, R. H., & Deschler, F.
Affiliations
  • University of Cambridge (GB)
  • Victoria University of Wellington (NZ)
Corresponding author
Deschler, Felix
Venue
Nature Communications
Published
2015-09-25
Volume
6
Issue
1
Pages
8420-8420
ISSN
2041-1723 (ISSN-L)
OpenAlex
W2233449626
Cited by
704
References
42
Citations by year
2026: 58 · 2025: 49 · 2024: 69 · 2023: 84 · 2022: 59 · 2021: 66 · 2020: 75 · 2019: 74 · 2018: 65 · 2017: 61 · 2016: 40 · 2015: 4
FWCI
27.28
Type
journal article
Language
en
Open access
Locations
  • Nature Communications (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Rare & Special e-Zone (The Hong Kong University of Science and Technology) (submittedVersion)
  • RePEc: Research Papers in Economics (submittedVersion)
  • Apollo (University of Cambridge) (submittedVersion, cc-by)
Funders
  • Deutsche Forschungsgemeinschaft
  • Cambridge Commonwealth Trust
  • Engineering and Physical Sciences Research Council (EP/M005143/1, EP/G060738/1)
  • Marsden Fund
Topics
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › Perovskite Materials and Applications
  • Physical Sciences › Materials Science › Materials Chemistry › 2D Materials and Applications
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › Organic Electronics and Photovoltaics
Keywords
hot carrier cooling, organic-inorganic lead halide perovskites, methylammonium lead iodide, photoinduced refractive index change, transient absorption spectroscopy, band gap renormalization, phonon bottleneck, effective mass, carrier mobility, polycrystalline perovskite

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