研究目的
To study the effect of ZnO colloid aggregation size on the morphology of ZnO interface layer and photovoltaic performance of polymer solar cells.
研究成果
The aggregation size of ZnO colloidal particles in precursor solution determined the structure and morphology of the ZnO electron interface layer, thereby further altering the photoelectric conversion performance of organic photovoltaic devices. The best performance was achieved with a 2 h aging time, resulting in a PCE of 10.21%.
研究不足
The study focuses on the effect of ZnO colloid aggregation size on the performance of polymer solar cells, but does not explore the impact of other factors such as temperature or humidity during the aging process. Additionally, the study is limited to PTB7-Th:PC71BM solar cells and may not be directly applicable to other types of polymer solar cells.
1：Experimental Design and Method Selection:
The study adjusted the size of ZnO colloidal particles in the precursor solution by aging time from 0 to 24 h to investigate its effect on the morphology of ZnO interface layer and the performance of polymer solar cells.
2：Sample Selection and Data Sources:
PTB7-Th and PC71BM were used as the active layer materials. ZnO precursor solutions were prepared with different aging times.
3：List of Experimental Equipment and Materials:
Materials included PTB7-Th, PC71BM, zinc acetate, 2-methoxy ethanol, ethanolamine, chlorobenzene, 1,8-diiodooctane, and ITO-coated glass substrate. Equipment included SEM, AFM, XRD, absorption spectrometer, and fluorescence spectrometer.
4：Experimental Procedures and Operational Workflow:
The ZnO precursor solutions were aged for specific times, spin-coated on ITO substrates, and annealed. The active layer was then spin-coated on the ZnO film, followed by deposition of MoO3 and Ag electrodes.
5：Data Analysis Methods:
The performance of the solar cells was evaluated through J-V measurements, and the morphology and structure of ZnO films were analyzed using SEM, AFM, and XRD.
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