研究目的
To investigate the influence of Al-doped ZnO (AZO) on the performance of inverted bulk heterojunction (BHJ) polymer solar cells based on PTB7:PC71BM.
研究成果
The introduction of an Al-doped ZnO electron transport layer significantly improved the efficiency of PTB7:PC71BM solar cells by enhancing conductivity and reducing series resistance, leading to a PCE of 8.98%.
研究不足
The study focused on the effect of Al doping on ZnO's conductivity and its impact on solar cell performance, but did not explore other dopants or the long-term stability of the devices.
1：Experimental Design and Method Selection:
The study involved doping the ZnO layer with aluminum (Al) to enhance its conductivity and investigating its effect on the performance of inverted BHJ solar cells.
2：Sample Selection and Data Sources:
The active layer was prepared using PTB7-Th and PC71BM in a 1:
3：5 ratio dissolved in chlorobenzene with 3% of 1,8-diiodooctane. List of Experimental Equipment and Materials:
Instruments included a Keithley 2401 source measurement unit, AFM (NanoNavi II, SII Nano Technology Inc.), hall-effect measurement system (Ecopia model No. HMS-5000), and UV/Vis spectrometer (Varian, Cary5000). Materials included zinc acetate, aluminum nitrate nonahydrate, and PTB7:PC71BM.
4：0). Materials included zinc acetate, aluminum nitrate nonahydrate, and PTB
4. Experimental Procedures and Operational Workflow: The ZnO and AZO solutions were prepared and spin-coated on ITO-coated glass substrates. The active layer was then deposited, followed by the application of MoO3 and Ag layers.
5：Experimental Procedures and Operational Workflow:
5. Data Analysis Methods: The performance of the solar cells was analyzed using J-V curves, EQE spectra, and impedance spectroscopy.
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