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Published on: September 27, 2018
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Ambient processed (110) preferred MAPbI3 thin films for highly efficient perovskite solar cells.
Rui Guo1, Biplav Dahal1, Arun Thapa1
1Department of Physics, Florida International University Miami FL 33199 USA Wenzhi.Li@fiu.edu.
Nanoscale Advances
|September 22, 2022
Summary
Methylamine (MA)-gas-mediated perovskite precursors create high-quality methylammonium lead iodide (MAPbI3) films for perovskite solar cells (PSCs). This method yields larger grains, smoother surfaces, and improved device efficiency compared to traditional techniques.
Area of Science:
- Materials Science
- Photovoltaics
- Nanotechnology
Background:
- Organic-inorganic hybrid perovskites exhibit remarkable optoelectronic properties, driving significant advancements in solar cell technology.
- Perovskite solar cells (PSCs) have shown rapid efficiency increases, positioning them as a leading next-generation photovoltaic technology.
- The methylamine (MA)-gas-mediated approach is emerging as a key method for fabricating high-quality perovskite thin films for large-scale PSC applications.
Purpose of the Study:
- To investigate the efficacy of a methylamine (MA)-gas-mediated precursor for depositing high-quality methylammonium lead iodide (MAPbI3) films.
- To compare the structural and morphological properties of MAPbI3 films prepared via the MA-gas-mediated method versus the Lewis adduct method.
- To evaluate the performance of planar PSC devices fabricated using MA-gas-mediated precursors.
Main Methods:
- Spin-coating of methylammonium lead iodide (MAPbI3) films using a MA-gas-mediated perovskite precursor.
- Characterization of film properties, including crystal grain size, surface roughness, and crystal orientation.
- Fabrication and performance testing of planar PSC devices.
Main Results:
- MA-gas-mediated MAPbI3 films exhibited larger crystal grains and lower surface roughness compared to films produced by the Lewis adduct method.
- A preferred (110) crystal orientation was observed in the MA-gas-mediated films, suggesting improved structural ordering.
- Planar PSC devices fabricated with the MA-gas-mediated precursor achieved a high power conversion efficiency of 19.28% and demonstrated superior average performance.
Conclusions:
- The MA-gas-mediated precursor method is effective for producing high-quality MAPbI3 films with desirable structural characteristics for PSCs.
- This approach offers advantages over the Lewis adduct method in terms of film morphology and device performance.
- The MA-gas-mediated method represents a promising route for the scalable fabrication of efficient perovskite solar cells.
