研究目的
To explore the effect of S···Cl noncovalent conformational locks (NCLs) on the photovoltaic performances of organic solar cells by designing and synthesizing two A-π-D-π-A non-fullerene acceptors (ITMIC and ITCIC).
研究成果
The introduction of S···Cl NCLs in non-fullerene acceptors significantly improved the planarity and rigidity of the π-conjugated skeleton, leading to enhanced charge transport mobility and photovoltaic performance. The PM6:ITCIC based organic solar cells achieved a PCE of 11.34%, demonstrating the potential of S···Cl NCLs in designing high-performance organic semiconductors.
研究不足
The study focuses on the effect of S···Cl NCLs on the performance of organic solar cells, but the scalability and long-term stability of the devices were not addressed. Additionally, the study does not explore the effect of other noncovalent interactions or the combination of different NCLs.
1：Experimental Design and Method Selection:
The study involved the synthesis of two non-fullerene acceptors (ITMIC and ITCIC) to explore the effect of S···Cl NCLs. The planarity and rigidity of the π-conjugated skeleton were analyzed using density functional theory (DFT).
2：Sample Selection and Data Sources:
ITMIC and ITCIC were synthesized and their photovoltaic properties were compared. The materials were characterized using UV-Vis absorption spectroscopy, cyclic voltammetry, and GIWAXS.
3：List of Experimental Equipment and Materials:
The study utilized chloroform (CF), chlorobenzene (CB), and dichloromethane (DCM) as solvents. The photovoltaic devices were fabricated with a conventional structure of ITO/PEDOT:PSS/active layer/Ca/Al.
4：Experimental Procedures and Operational Workflow:
The photovoltaic properties were investigated by fabricating organic solar cells and measuring their J-V curves, EQE spectra, and charge transport mobilities using the space-charge-limited-current (SCLC) method.
5：Data Analysis Methods:
The data were analyzed to determine the power conversion efficiency (PCE), open-circuit voltage (Voc), short-circuit current density (Jsc), and fill factor (FF) of the devices.
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