研究目的
Investigating the development of two-terminal all-perovskite tandem solar cells with improved photovoltaic parameters through a new processing method for uniform, thick tin–lead perovskite layers.
研究成果
The study demonstrates a significant step forward in the realization of highly efficient all-perovskite 2T tandem solar cells through improved processing methods for low bandgap perovskite layers, although further advancements are needed to overcome current limitations.
研究不足
The efficiency of the tandem solar cells is still below the record value for perovskite single-junction cells, due to losses in the short circuit current density and low open-circuit voltage from the wide-bandgap sub-cell.
1：Experimental Design and Method Selection:
The study focuses on the incorporation of small amounts of chlorine in the precursor solution of the low-bandgap perovskite and the use of diethyl ether during the spin-coating process to facilitate uniform crystallization.
2：Sample Selection and Data Sources:
The research utilizes tin–lead perovskite films with large grains for single-junction and tandem solar cells.
3：List of Experimental Equipment and Materials:
Includes spin-coating equipment, lead chloride, lead iodide, tin–iodide solution, diethyl ether, and annealing equipment.
4：Experimental Procedures and Operational Workflow:
The process involves mixing precursors, spin-coating, deposition of diethyl ether, annealing, and the fabrication of solar cells.
5：Data Analysis Methods:
Analysis of power conversion efficiencies, open circuit voltage, and other photovoltaic parameters.
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