研究目的
To explore the possibility of recycling durable zinc oxide coated indium tin oxide (ITO/ZnO) from nonfullerene organic solar cells (OSCs) to promote circular economy and reduce electronic materials wastes.
研究成果
Recycled ITO/ZnO substrates can be used to fabricate efficient OSCs with PCEs slightly lower than those using fresh substrates. Avoiding isopropanol in the cleaning process allows for multiple recycling without significant drops in photovoltaic performances, opening the path to low-cost energy device fabrication and reduction in electronic wastes.
研究不足
The use of isopropanol in the cleaning process gradually removes the zinc oxide layer, which should be avoided for multiple recycling. The removal of encapsulation layers without damaging the substrate is a technical challenge for industrial applications.
1：Experimental Design and Method Selection:
The study involves recycling ITO/ZnO substrates from nonfullerene OSCs through sequential ultrasonication in a series of solvents followed by thermal annealing.
2：Sample Selection and Data Sources:
Patterned ITO-coated glass substrates are used, cleaned by successive ultrasonication in acetone, surfactant, water, and isopropanol.
3：List of Experimental Equipment and Materials:
A precursor solution composed of zinc acetate dihydrate and 2-aminoethanol in 2-methoxyethanol is spin-coated on the substrates. The active layer solution has a 1:1 PBDB-T:ITIC ratio in chlorobenzene.
4：Experimental Procedures and Operational Workflow:
The substrates are annealed to convert the precursor thin film to ZnO. The active layers are spin-coated, followed by evaporation of MoO3 and Ag.
5：Data Analysis Methods:
The photovoltaic characteristics are measured with a Keithley 2401 sourcemeter using a solar simulator. Absorption spectra, SEM, AFM, XRD, and XPS are used for analysis.
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