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Optimal Methylammounium Chloride Additive for High-Performance Perovskite Solar Cells.

Qinghua Cao1, Hui Liu1, Jiangping Xing1

  • 1School of Physics and Opto-Electronic Engineering, Guangdong Provincial Key Laboratory of Sensing Physics and System Integration Applications, Guangdong University of Technology, Guangzhou 510006, China.

Nanomaterials (Basel, Switzerland)
|February 25, 2025
PubMed
Summary

Adding methylammonium chloride (MACl) to perovskite precursors improves perovskite solar cell (PSC) performance. Optimal MACl concentration enhances film quality, leading to higher power conversion efficiencies (PCEs).

Keywords:
MACl additivehigh-performance PSCsperovskite film quality

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Area of Science:

  • Materials Science
  • Renewable Energy
  • Photovoltaics

Background:

  • Organic-inorganic lead halide perovskite solar cells (PSCs) show significant potential due to excellent photophysical properties.
  • Perovskite film quality is critical for high-efficiency PSCs.
  • Additive engineering is a key strategy for controlling perovskite crystallization.

Purpose of the Study:

  • To investigate the use of methylammonium chloride (MACl) as an additive in perovskite precursors.
  • To optimize MACl concentration for improved perovskite film crystallization and defect suppression.
  • To enhance the performance of PSCs through additive engineering.

Main Methods:

  • Systematic variation of MACl percentages in perovskite precursor solutions.
  • Characterization of perovskite film morphology, grain size, surface smoothness, and defect density.
  • Fabrication and performance testing of PSC devices with varying MACl concentrations.

Main Results:

  • The optimal MACl concentration was determined to be 10%.
  • 10% MACl addition resulted in improved perovskite film morphology, characterized by larger grains and a smoother surface.
  • Defect formation in the perovskite layer was significantly suppressed with the optimal MACl content.
  • PSCs with 10% MACl additive achieved a peak power conversion efficiency (PCE) of 23.61%, compared to 16.72% for the control device.

Conclusions:

  • Methylammonium chloride (MACl) is an effective additive for enhancing perovskite film quality in PSCs.
  • Optimized MACl incorporation leads to superior perovskite crystallization and reduced defects.
  • The study demonstrates a viable method for achieving high-performance PSCs through simple additive engineering.