研究目的
To effectively modify the phase separation between the J71:ITIC blend by incorporating a 3D aggregation-induced emission (AIE) material, Tetraphenylethylene (TPE), to achieve high power conversion efficiencies (PCEs) in organic solar cells.
研究成果
The incorporation of TPE in the J71:ITIC blend effectively modifies the phase separation, leading to enhanced charge mobility, lower bimolecular recombination, and improved fill factor, resulting in a significant increase in PCE. The study demonstrates the potential of using 3D AIE molecules to optimize the BHJ interface in organic solar cells.
研究不足
The study is limited to the specific binary blend of J71:ITIC and the incorporation of TPE as the third component. The effectiveness of TPE in other systems may vary, and the study does not explore the long-term stability of the ternary devices.
1：Experimental Design and Method Selection:
The ternary strategy was employed to modify the phase separation between the J71:ITIC blend by incorporating TPE. UV?vis absorption spectra, TEM images, GIWAXS measurements, and vertical phase separation analysis were conducted.
2：Sample Selection and Data Sources:
The binary blend of J71:ITIC and ternary blends with various concentrations of TPE were prepared. The samples were characterized using various spectroscopic and microscopic techniques.
3：List of Experimental Equipment and Materials:
Shimadzu UV-3600 spectrophotometer, Tecnai G2 F20 U-TWIN TEM, Xenocs-SAXS/WAXS system, PG2000 – PRO spectrophotometer integrated with a PT15S, SANHOPTT 300 W plasma etching machine, Coherent Chameleon Ultra II femtosecond pulse laser.
4：Experimental Procedures and Operational Workflow:
The active layer blends were prepared by dissolving the J71 donor with the ITIC acceptor in a 1:1 D/A ratio in Chloroform (CF). Ternary blends were prepared by adding TPE in various concentrations. The devices were fabricated with an inverted architecture of glass/ITO/ZnO/active layer/MoOx/Ag.
5：Data Analysis Methods:
The data were analyzed using various techniques including UV-vis absorption spectra, TEM, GIWAXS, and vertical phase separation analysis to evaluate the morphology, crystallinity, and phase separation of the active layers.
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