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Quantifying X-Ray Fluorescence Data Using MAPS
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Gamma-ray dose threshold for MAPbI3 solar cells.

A G Boldyreva1, A V Novikov1, V G Petrov2

  • 1Skolkovo Institute of Science and Technology, Nobel Street 3, Moscow 143026, Russia. a.boldyreva@skoltech.ru.

Physical Chemistry Chemical Physics : PCCP
|April 15, 2024
PubMed
Summary
This summary is machine-generated.

This study reveals that low gamma-ray doses improve methylammonium lead iodide (MAPbI3) solar cells by reducing defects. Higher doses, however, cause significant damage, establishing a 10 kGy threshold for material stability.

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Area of Science:

  • Materials Science
  • Solid-State Physics
  • Photovoltaics

Background:

  • Methylammonium lead iodide (MAPbI3) is a promising perovskite material for solar cells.
  • Understanding the stability of MAPbI3 under ionizing radiation is crucial for its application.

Purpose of the Study:

  • To investigate the effects of gamma-ray irradiation on MAPbI3 polycrystalline films and solar cells.
  • To determine the dose threshold for MAPbI3 degradation and identify potential benefits of low-dose exposure.

Main Methods:

  • Photoluminescence spectroscopy
  • Time-resolved photoluminescence
  • Suns-VOC measurements
  • Impedance spectroscopy

Main Results:

  • Low gamma-ray doses (3-5 kGy) reduced defect centers, enhancing carrier lifetime and extraction.
  • Higher doses (≥10 kGy) led to predominant non-radiative recombination, degrading material performance.
  • A gamma-ray threshold of approximately 10 kGy was identified for MAPbI3 stability.

Conclusions:

  • MAPbI3 exhibits a dose-dependent response to gamma radiation, with a critical threshold around 10 kGy.
  • The material shows potential for space applications due to its tolerance to typical yearly doses.
  • Gamma irradiation can be explored as a method to improve defective perovskite films before use in radiation-free environments.