研究目的
To study the improvement of solar cell performance through the parallel homo-tandem architecture, focusing on optical design to maximize absorption of the AM1.5 spectrum, comparing ITO electrodes with ITO-free alternatives like the Two-Resonance Tapping Cavity.
研究成果
The study demonstrates that a well-designed parallel homo-tandem geometry can boost the cell performance, with photonic optimization achievable through a simple transfer matrix analysis. The thickness of the central electrode is highlighted as a key design parameter, with the proper thickness significantly enhancing the absorptivity of the cell in the long-wavelength range in the back subcell.
研究不足
The study excludes microscopic details such as inhomogeneities and fabrication procedures, which generally strongly affect the Fill Factor (FF) of the cell but can only be reliably studied on a case-by-case basis through laboratory experiment.
1：Experimental Design and Method Selection:
The study uses the method of transfer matrices to compute the absorbed light in the active layers upon normal incidence with the AM
2：5 spectrum. Sample Selection and Data Sources:
Active materials studied include PTB7-th:PC71BM, P3HT:PC61BM, DBP:C70, and methylammonium lead halide perovskite, with experimentally measured values for the complex refractive indexes.
3：List of Experimental Equipment and Materials:
The study considers both ITO electrode and a recently devised ITO-free alternative, the Two-Resonance Tapping Cavity (TRTC).
4：Experimental Procedures and Operational Workflow:
The study involves simulating solar cells with various active materials and variable geometrical parameters, computing the absorbed light in the active layers, and evaluating the fraction of the incoming intensity that is absorbed in the active layers.
5：Data Analysis Methods:
The external quantum efficiency (EQE) is calculated based on the absorbed light, and the short-circuit current density is computed.
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