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Highly Efficient Monolithic Perovskite/Perovskite/Silicon Triple-Junction Solar Cells
Faming Li1, Dan Wu1, Le Shang1
1School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu, 611731, P. R. China.
Advanced Materials (Deerfield Beach, Fla.)
|January 8, 2024
Summary
Researchers developed a new alloying strategy for wide-bandgap perovskites, significantly boosting performance in triple-junction solar cells. This innovation overcomes previous limitations, achieving a certified 24.19% efficiency for perovskite-based triple-junction tandem solar cells.
Area of Science:
- Materials Science
- Photovoltaics
- Solid-State Chemistry
Background:
- Wide-bandgap metal halide perovskites show potential for multijunction photovoltaic (PV) cells.
- Photoinduced phase segregation and low open-circuit voltage (Voc) hinder perovskite-based multijunction device performance.
Purpose of the Study:
- To overcome performance limitations in perovskite-based multijunction solar cells.
- To develop a strategy for uniform cation and halide distribution in wide-bandgap perovskites.
Main Methods:
- Alloying strategy using Rb+ and Cl- doping to achieve uniform triple cation and halide distribution.
- Suppression of halide phase segregation and homogenization of surface potential in perovskites.
- Fabrication and characterization of single-junction and triple-junction tandem solar cells.
Main Results:
- Achieved a Voc of 1.33 V in single-junction perovskite solar cells.
- Demonstrated a perovskite/perovskite/c-Si triple-junction tandem cell with a VOC approaching 3.0 V.
- Attained a power conversion efficiency of 25.0% (reverse scan) with a certified efficiency of 24.19% for the triple-junction tandem cell.
Conclusions:
- The alloying strategy effectively suppresses halide phase segregation and homogenizes surface potential.
- The developed triple-junction tandem solar cell achieves record-breaking certified efficiency for perovskite-based devices.
- This materials-by-design approach overcomes performance bottlenecks in perovskite-based triple-junction tandem solar cells.
