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Updated: Oct 6, 2025
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Recombination Dynamics in Thin-film Photovoltaic Materials via Time-resolved Microwave Conductivity
Published on: March 6, 2017
11.8K
Carrier recombination in CH3NH3PbI3: why is it a slow process?
Abhishek Maiti1, Amlan J Pal1,2
1School of Physical Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India.
Reports on Progress in Physics. Physical Society (Great Britain)
|January 17, 2022
Summary
The slow recombination of photogenerated carriers in methylammonium lead iodide (MAPbI3) is key to high-efficiency perovskite solar cells. This review critically assesses proposed mechanisms, offering insights into recombination dynamics.
Area of Science:
- Materials Science
- Photovoltaics
- Solid-State Physics
Background:
- Methylammonium lead iodide (MAPbI3) exhibits slow photogenerated carrier recombination, a critical factor for high-efficiency perovskite solar cells.
- Despite extensive research, the precise mechanisms governing carrier recombination dynamics in MAPbI3 remain incompletely understood.
Purpose of the Study:
- To critically review and assess proposed microscopic processes contributing to slow recombination pathways in MAPbI3.
- To elucidate the origin of slow recombination dynamics by analyzing the interplay of various proposed mechanisms.
Main Methods:
- Comprehensive literature review and critical assessment of existing theoretical models and experimental findings.
- Analysis of proposed mechanisms including shallow defects, electron-phonon coupling, ferroelectric domains, polarons, Rashba splitting, and photon recycling.
Main Results:
- Evaluation of multiple hypotheses for slow recombination, including defect states, polaronic screening, and photon recycling.
- Discussion on the interdependence of different recombination mechanisms and their contributions to overall dynamics.
Conclusions:
- The review provides a consolidated perspective on the complex recombination dynamics in MAPbI3.
- Identifying the dominant mechanisms governing carrier recombination is crucial for further optimization of perovskite solar cell performance.
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