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Related Concept Videos

Voltaic/Galvanic Cells02:47

Voltaic/Galvanic Cells

Spontaneous Chemical Reactions
Spontaneous redox reactions occur abundantly in nature. The chemical reaction occurring in a disposable AA battery powering our remote controls is one such example of a spontaneous redox reaction. Another example is the immersion of coiled copper wire into an aqueous silver nitrate solution. The reaction shows a gradual, visually impressive color change from colorless to bright blue and the formation of a grey precipitate on the copper wire. In this experiment,...
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Related Experiment Video

Updated: May 11, 2026

Influence of Hybrid Perovskite Fabrication Methods on Film Formation, Electronic Structure, and Solar Cell Performance
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Inverted perovskite solar cells using dimethylacridine-based dopants.

Qin Tan1, Zhaoning Li1, Guangfu Luo1

  • 1Department of Materials Science and Engineering, Institute of Innovative Materials, Shenzhen Key Laboratory of Full Spectral Solar Electricity Generation, Southern University of Science and Technology, Shenzhen, China.

Nature
|May 24, 2023
PubMed
Summary

Researchers developed a novel molecular doping process for perovskite solar cells, enhancing efficiency and stability. This method improves the perovskite/indium tin oxide contact and passivates grain boundaries, leading to high power conversion efficiency.

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Area of Science:

  • Materials Science
  • Renewable Energy

Background:

  • Perovskite solar cells require efficient doping and grain boundary passivation for high performance.
  • Constructing inverted perovskite/indium tin oxide (ITO) Schottky contacts without hole-transport layers is challenging.

Purpose of the Study:

  • To develop a molecular doping process for creating well-matched p-perovskite/ITO contacts.
  • To achieve all-round passivation of grain boundaries in perovskite films.
  • To enhance the power conversion efficiency (PCE) and stability of perovskite solar cells.

Main Methods:

  • A dimethylacridine-based molecular doping process was employed.
  • A molecule-extrusion process during chlorobenzene-quenched crystallization was utilized.
  • Coordination complex formation between the molecule and perovskite was analyzed.

Main Results:

  • A certified PCE of 25.39% was achieved for the perovskite solar cells.
  • The molecular doping process resulted in p-type doping of the perovskite film.
  • The device demonstrated excellent stability, retaining 96.6% of its initial PCE after 1,000 hours of light soaking.

Conclusions:

  • The developed molecular doping and passivation strategy effectively enhances perovskite solar cell performance.
  • The molecule-extrusion process is key to forming efficient p-perovskite/ITO contacts and passivating grain boundaries.
  • The study presents a promising pathway for developing stable and highly efficient perovskite solar cells.