研究目的
To enhance the electrical conductivity of PEDOT:PSS films used as hole transport layers in perovskite solar cells through hybrid co-solvent post-treatment, thereby improving the power conversion efficiency of the solar cells.
研究成果
The co-solvent post-treatment significantly enhances the electrical conductivity of PEDOT:PSS films, leading to improved power conversion efficiency in perovskite solar cells. The highest PCE improvement of 17.5% was achieved with methanol:DMF co-solvent TBT treatment, attributed to enhanced hole extraction and transport.
研究不足
The study focuses on the enhancement of PEDOT:PSS film conductivity and its application in perovskite solar cells, but does not explore long-term stability or scalability of the treatment methods for industrial applications.
1：Experimental Design and Method Selection:
Two methods, treatment before thermal annealing (TBT) and treatment after thermal annealing (TAT), were employed to treat PEDOT:PSS films with DMF, methanol, and their mixture solvents to enhance conductivity.
2：Sample Selection and Data Sources:
PEDOT:PSS films were prepared on pre-cleaned glass substrates. Perovskite solar cells were fabricated using these films as HTLs.
3：List of Experimental Equipment and Materials:
Materials included PEDOT:PSS aqueous solution, methylammonium iodide, lead iodide, lead chloride, DMSO, chlorobenzene, methanol, and DMF. Equipment included a spin coater, hotplate, UV-ozone cleaner, and solar simulator.
4：Experimental Procedures and Operational Workflow:
PEDOT:PSS films were treated with solvents using TBT or TAT methods. Perovskite layers were then deposited, followed by the fabrication of solar cells with PCBM and BCP layers and silver electrodes.
5：Data Analysis Methods:
Conductivity was measured using a four-point probe technique. UV absorption spectra, AFM, contact angle measurements, and photovoltaic performance were analyzed.
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