研究目的
To design and synthesize a new fused-ring electron acceptor FOIC1 and fabricate organic solar cells with an unusual inverted structure to achieve higher power conversion efficiency compared to traditional bulk heterojunction devices.
研究成果
The SHJ devices with an unusual inverted structure demonstrated a more efficient exciton generation and dissociation, as well as a more balanced charge transport compared to the BHJ counterpart, achieving a higher power conversion efficiency of 12.0%. This indicates the potential of the unusual SHJ structure in realizing high-performance organic solar cells.
研究不足
The study focuses on the specific materials PTB7-Th and FOIC1, and the unusual inverted structure may not be universally applicable to all organic solar cell materials. The scalability and long-term stability of the SHJ devices were not extensively discussed.
1：Experimental Design and Method Selection:
Designed and synthesized a new fused-ring electron acceptor FOIC1. Fabricated organic solar cells with an unusual inverted structure by sequentially spin-coating polymer donor PTB7-Th as the bottom layer and acceptor FOIC1 as the top layer.
2：Fabricated organic solar cells with an unusual inverted structure by sequentially spin-coating polymer donor PTB7-Th as the bottom layer and acceptor FOIC1 as the top layer.
Sample Selection and Data Sources:
2. Sample Selection and Data Sources: Used PTB7-Th as the electron donor and FOIC1 as the acceptor due to their orthogonal solubility, complementary absorption spectra, and matched energy levels.
3：List of Experimental Equipment and Materials:
Utilized ITO glass/ZnO/active layer/MoO3/Ag structure for device fabrication. Materials included PTB7-Th, FOIC1, 2-methyltetrahydrofuran (2-MeTHF), and o-dichlorobenzene (o-DCB).
4：Experimental Procedures and Operational Workflow:
Sequentially spin-coated PTB7-Th and FOIC1 layers, optimized device performance without post-treatments.
5：Data Analysis Methods:
Analyzed device performance through J-V characteristics, EQE spectra, and film-depth-dependent light absorption spectroscopy.
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