研究目的
Investigating the enhancement of light trapping in flexible perovskite solar cells through high throughput texturing of polymer foils using roll-to-roll hot embossing.
研究成果
The study demonstrated that texturing PET foils via roll-to-roll hot embossing significantly enhances the light trapping capability, leading to an increase in the efficiency of flexible perovskite solar cells. The cost analysis indicated that integrating the hot embossing step into the manufacturing process would represent a negligible additional cost, making it a viable method for industrial scale integration.
研究不足
The study notes fluctuations in performance parameters within the same processing batch for PET-based devices, attributed to deviations in film thickness and inhomogeneous imprinted structures. The low processing temperature for PET substrates may also result in increased defect concentrations in the perovskite layer.
1：Experimental Design and Method Selection:
The study employed roll-to-roll hot embossing to pattern flexible PET foils, using a cylindrical mold structured with periodic grooves by picosecond Direct Laser Interference Patterning (DLIP).
2：Sample Selection and Data Sources:
A 200 μm thick polyethylene terephthalate (PET) foil was used as the substrate.
3：List of Experimental Equipment and Materials:
Equipment included a DLIP setup for structuring the nickel sleeve, a roll-to-roll hot embossing system, and atomic force microscopy for characterization.
4：Experimental Procedures and Operational Workflow:
The PET foils were imprinted using the structured nickel sleeve in a roll-to-roll hot embossing process. The optical properties of the textured PET were characterized, and perovskite solar cells were deposited onto both flat and textured PET foils.
5：Data Analysis Methods:
The performance of the solar cells was characterized by current-voltage curves and external quantum efficiency measurements.
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