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Synchronized crystallization in tin-lead perovskite solar cells
Yao Zhang1,2, Chunyan Li1,2, Haiyan Zhao1,2
1State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai, China.
Nature Communications
|August 12, 2024
Summary
Researchers developed a novel method to synchronize tin-lead perovskite crystallization for improved thin-film solar cells. This breakthrough enhances film quality and device stability, paving the way for efficient photovoltaic applications.
Area of Science:
- Materials Science
- Renewable Energy
Background:
- Tin-lead halide perovskites offer promising photovoltaic properties with a bandgap near 1.2 eV.
- Solution-processed Sn-Pb perovskites suffer from asynchronous crystallization, hindering film quality.
Purpose of the Study:
- To address the asynchronous crystallization issue in tin-lead perovskites.
- To improve the film quality and performance of tin-lead perovskite solar cells.
Main Methods:
- Investigated the role of the stereochemically active lone pair in Sn(II) crystallization.
- Introduced a noncovalent binding agent to synchronize crystallization kinetics.
- Fabricated single-junction Sn-Pb perovskite solar cells.
Main Results:
- Synchronized crystallization kinetics and homogenized Sn-Pb alloying.
- Achieved a certified power conversion efficiency of 24.13% for Sn-Pb perovskite solar cells.
- Demonstrated excellent operational stability, retaining 90% efficiency after 795 hours.
Conclusions:
- The noncovalent binding agent effectively synchronizes Sn-Pb perovskite crystallization.
- The developed method significantly enhances the performance and stability of perovskite solar cells.
- Tin-lead perovskites are a viable and stable option for future thin-film photovoltaic technologies.
