研究目的
Investigating the optimization of microstructure morphology and reduction of electronic losses in 1-cm2 polymer solar cells to achieve efficiency over 15%.
研究成果
The study successfully demonstrated that optimizing the photoactive microstructures and engineering the substrate layout can efficiently reduce optoelectronic losses for upscaling of OSCs. By integrating TzBI-based donors and Y6 into the photoactive layer and incorporating PCBM as a third component, the team achieved high EQE and IQE values, leading to a record efficiency of over 15% for OSCs with a device area of >1.1 cm2.
研究不足
The study is limited by the trade-off between reducing electrode thickness for enhanced transmittance and the resulting increased sheet resistance, which induces more electrical losses. Additionally, the time-consuming process of synthesizing new materials and uncertainty in film quality and photovoltaic performances are noted challenges.
1：Experimental Design and Method Selection:
The study focused on optimizing the photoactive layer and minimizing optoelectronic losses in OSCs. It involved the development of imide-functionalized benzotriazole (TzBI)-based donors and their combination with a non-fullerene acceptor (Y6).
2：6). Sample Selection and Data Sources:
2. Sample Selection and Data Sources: The photoactive layers consisted of polymer:Y6 blends, with the addition of PCBM as a third component for ternary blends.
3：List of Experimental Equipment and Materials:
ITO substrates with and without metallic frames (ITO-P and ITO-M), PEDOT:PSS, PFNDI-Br, Ag, and various polymer donors and acceptors.
4：Experimental Procedures and Operational Workflow:
Devices were fabricated with a conventional structure, treated with dibenzylether (DBE), and thermal-annealed. J-V characteristics were recorded under simulated solar illumination.
5：Data Analysis Methods:
EQE and IQE measurements, GIWAXS, TEM, and SCLC measurements were used to analyze the performance and morphology of the devices.
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