研究目的
To develop a high-performance liquid crystalline small-molecule donor (BTR-Cl) for all-small-molecule organic solar cells (ASM OSCs) that achieves a record-high power conversion efficiency (PCE) of 13.6%.
研究成果
The development of BTR-Cl, a liquid crystalline small-molecule donor, in combination with the non-liquid crystalline acceptor Y6, has led to a record-high PCE of 13.6% in ASM OSCs. This achievement underscores the importance of crystallinity and intermolecular interaction in optimizing phase separation and device performance.
研究不足
The study highlights the challenge of controlling phase separation in ASM OSCs and the need for further optimization of molecular design to enhance device performance and reproducibility.
1：Experimental Design and Method Selection:
The study involved the synthesis of a new small-molecule donor, BTR-Cl, and its characterization alongside the non-liquid crystalline acceptor Y
2：The methodology included the use of liquid crystalline materials to enhance crystallinity and intermolecular interaction for better phase separation. Sample Selection and Data Sources:
The samples included BTR-Cl and Y6, with their optoelectronic properties and photovoltaic performance analyzed.
3：List of Experimental Equipment and Materials:
Instruments used included a Keithley 2400 source meter for J-V characteristics, a PerkinElmer Lambda 365 spectrophotometer for UV-vis absorption spectra, and a Bruker atomic force microscope for AFM imaging.
4：Experimental Procedures and Operational Workflow:
The fabrication of OSC devices involved spin-coating PEDOT:PSS and active layers, followed by thermal evaporation of Ag electrodes. Device performance was tested under simulated AM
5：5 G solar irradiation. Data Analysis Methods:
The study utilized GIWAXS for crystallinity analysis, SCLC for charge carrier mobility measurements, and TRPL, TPC, and TPV for charge generation and recombination dynamics.
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