研究目的
To propose a consistent method for comparing open-circuit voltages in lead-halide perovskite solar cells by analyzing different methods to determine the bandgap and a radiative limit for open-circuit voltage.
研究成果
The paper concludes that a consistent method for determining the bandgap and referencing open-circuit voltages is essential for fair comparisons in the field of lead-halide perovskite solar cells. It proposes an approach based on the solar cell quantum efficiency as a general reference.
研究不足
The study highlights the variability in bandgap definitions and the consequent impact on the comparison of open-circuit voltages. It suggests the need for a consistent method to enable fair comparisons.
1：Experimental Design and Method Selection:
The study involves a meta-analysis of methods to determine the bandgap and a radiative limit for open-circuit voltage in lead-halide perovskite solar cells.
2：Sample Selection and Data Sources:
The analysis is based on published data of lead-halide perovskite solar cells with high open-circuit voltages.
3：List of Experimental Equipment and Materials:
Not explicitly mentioned.
4：Experimental Procedures and Operational Workflow:
The study compares different definitions of bandgap used in the literature and calculates the corresponding open-circuit voltages in the Shockley–Queisser (SQ) limit.
5：Data Analysis Methods:
The differences between the methods are analyzed, and an approach based on the solar cell quantum efficiency as a general reference is proposed.
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