Elucidating the role of disorder and free-carrier recombination kinetics in CH3NH3PbI3 perovskite films
Open accessAbstract
Apart from broadband absorption of solar radiation, the performance of photovoltaic devices is governed by the density and mobility of photogenerated charge carriers. The latter parameters indicate how many free carriers move away from their origin, and how fast, before loss mechanisms such as carrier recombination occur. However, only lower bounds of these parameters are usually obtained. Here we independently determine both density and mobility of charge carriers in a perovskite film by the use of time-resolved terahertz spectroscopy. Our data reveal the modification of the free carrier response by strong backscattering expected from these heavily disordered perovskite films. The results for different phases and different temperatures show a change of kinetics from two-body recombination at room temperature to three-body recombination at low temperatures. Our results suggest that perovskite-based solar cells can perform well even at low temperatures as long as the three-body recombination has not become predominant.
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Thin perovskite active layer materials may generate fewer photons, resulting in a smaller current density in PSC devices, while thicker perovskite materials impact a high recombination rate, affecting overall performance.
“For instance, thin perovskite active layer materials may generate fewer photons, resulting in a smaller current density in PSC devices, while thicker perovskite materials impact a high recombination rate, affecting overall performance.[177,178]”
From Advances in Blue Energy Fuels: Harvesting Energy from Ocean for Self‐Powered Electrolysis (2025) · cites this paper as [177]
The Discussion says carrier recombination affects diffusion length and solar-cell performance. But the Methods describe a film of approximately 230 nm, and the paper does not establish that thinner layers reduce current density or that thicker layers increase recombination. Its support is limited to the general performance effect of recombination, not the claimed thickness trade-off. (LLM, conf=0.84)
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References 35 · Cited by 167
Research works printed but not linked: 5
- Dexheimer S. (ed.) Terahertz Spectroscopy: Principles and Applications CRC Press (2007).
- Smith N. V. Classical generalization of the Drude formula for the optical conductivity. Phys. Rev. B 64, 155106 (2001).
- Ueda A., Tayagaki T. & Kanemitsu Y. Dynamics of quantized Auger recombinationin CdSe nanocrystals studied by femtosecond intraband pump-probe spectroscopy. J. Phys. Soc. Jpn 78, 083706 (2009).
- Ueda A., Tayagaki T., Fukuda M., Fujii M. & Kanemitsu Y. Breakdown of the k-selection rule in quantized Auger recombination in Si1-xGex nanocrystals. Phys. Rev. B 86, 155316 (2012).
- Yamada Y., Nakamura T., Endo M., Wakamiya A. & Kanemitsu Y. Photoelectronic responses in solution-processed perovskite CH3NH3PbI3 solar cells studied by photoluminescence and photoabsorption spectroscopy. IEEE J. Photovoltaics 5, 401– 405 (2015).
- Authors
- La-o-vorakiat, C., Salim, T., Kadro, J., Khuc, M.-T., Haselsberger, R., Cheng, L., Xia, H., Gurzadyan, G. G., Su, H., Lam, Y. M., Marcus, R. A., Michel-Beyerle, M.-E., & Chia, E. E. M.
- Affiliations
- Nanyang Technological University (SG)
- California Institute of Technology (US)
- Corresponding author
- Marcus, Rudolph A.
- Chia, Elbert E. M.
- ORCID
- Venue
- Nature Communications
- Published
- 2015-07-30
- Volume
- 6
- Issue
- 1
- Pages
- 11054-11054
- ISSN
- 2041-1723 (ISSN-L)
- PMC
- PMC4532878
- OpenAlex
- W1907244666
- Cited by
- 167
- References
- 35
- Citations by year
- 2026: 7 · 2025: 11 · 2024: 5 · 2023: 9 · 2022: 15 · 2021: 16 · 2020: 16 · 2019: 18 · 2018: 17 · 2017: 22 · 2016: 22 · 2015: 9
- FWCI
- 11.25
- Type
- journal article
- Language
- en
- Update notices
- correction (2016-03-10)
- Open access
- gold
- doi.org
- Locations
- Nature Communications (publishedVersion, cc-by)
- Europe PMC (PubMed Central) (publishedVersion, cc-by)
- PubMed Central (publishedVersion, cc-by)
- PubMed (publishedVersion)
- CaltechAUTHORS (California Institute of Technology) (submittedVersion, cc-by)
- Rare & Special e-Zone (The Hong Kong University of Science and Technology) (submittedVersion)
- RePEc: Research Papers in Economics (submittedVersion)
- DR-NTU (Nanyang Technological University) (submittedVersion, cc-by)
- Funders
- Strategiske Forskningsråd
- National Research Foundation (NRF-CRP4-2008-04)
- Nanyang Technological University (Tier 1)
- Bundesministerium für Bildung und Forschung
- Office of Naval Research
- Army Research Office
- Topics
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Perovskite Materials and Applications
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Organic Electronics and Photovoltaics
- Physical Sciences › Materials Science › Materials Chemistry › Ferroelectric and Piezoelectric Materials
- Keywords
- methylammonium lead iodide, perovskite thin films, carrier mobility, carrier concentration, disorder, backscattering, three-body recombination, time-resolved terahertz spectroscopy, perovskite solar cells, low-temperature performance
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