研究目的
Investigating the efficiency improvements of perovskite solar cells through new device simulation, focusing on parallel and in-series connections of p-i-n GaAs and perovskite photovoltaic cells.
研究成果
Parallel connection of tandem solar cells is more advantageous than in-series connection, especially when sub-cells' photocurrent is unbalanced, demonstrating efficiencies over 20%. The approach shows potential for achieving record efficiencies of more than 25% with further development.
研究不足
The study is limited by the need for similar Voc values in sub-cells for parallel connection advantages and the potential for power mismatch in current generation direction.
1：Experimental Design and Method Selection:
The study employs a single diode model for parameter extraction, including Rseries, Rshunt, non-ideality factor, and Jo (dark saturation current), to fit experimental and simulated curves.
2：Sample Selection and Data Sources:
Uses p-i-n GaAs diodes and CH3NH3PbI3 perovskite for sub-cells.
3：List of Experimental Equipment and Materials:
Includes Thermo Oriel ABA solar simulator, Keithley 2400 SMU for I-V output characterization, and QE X6 system for external quantum efficiency measuring.
4：Experimental Procedures and Operational Workflow:
Involves light measurements under standard
5：5 AM G conditions with an aperture mask to balance current densities of sub-cells. Data Analysis Methods:
Simplified calculation route to single diode model for output parameters extraction.
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