研究目的
To provide a comprehensive guideline involving semianalytical equations for thickness optimization of the front and rear transport layers, perovskite, and transparent conductive oxides to improve the antireflection and light trapping properties, and therefore to maximize the photocurrent of perovskite solar cells.
研究成果
The study provides a comprehensive optical design guideline for the thickness optimization of perovskite solar cells, demonstrating that a photocurrent enhancement above 2 mA cm?2 can be achieved by optimizing the thicknesses of the layers. The guideline can be extended to other direct bandgap absorber-based solar cells in superstrate configuration.
研究不足
The study focuses on MAPI type perovskite solar cells and the proposed guideline's validity for other types of perovskites requires further experimental verification. Additionally, the study assumes certain optical coefficients and conditions that may not account for all real-world variations.
1：Experimental Design and Method Selection:
The study employs transfer matrix method (TMM) for optical simulations and finite difference time domain (FDTD) simulations for roughness calculations.
2：Sample Selection and Data Sources:
The study uses CH3NH3PbI3 (MAPI) type perovskite solar cells and tests the proposed guideline against experiments and previously published experimental and simulation results.
3：List of Experimental Equipment and Materials:
Includes ITO coated glass substrates, NiOx sputtering target, PbI2 and CH3NH3I (MAI), Fullerene (C60), and 2,9-Dimethyl-4,7-diphenyl-1,10-phenanthroline (BCP).
4：Experimental Procedures and Operational Workflow:
Involves cleaning ITO coated substrates, sputtering NiOx, co-evaporating PbI2 and CH3NH3I to form MAPI, and depositing C60 and BCP as ETL, followed by silver as the top electrode.
5：Data Analysis Methods:
The study uses TMM to compute reflection and absorption of layers and FDTD simulations for roughness calculations.
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