研究目的
Investigating the enhancement of power conversion efficiency in ternary organic solar cells through the use of two non-fullerene acceptors with complimentary absorption and balanced crystallinity.
研究成果
The introduction of a high crystallinity small-molecule acceptor C8IDTT-4Cl into a binary blend of PBDT-TPD and ITIC-4F significantly improves the power conversion efficiency of ternary organic solar cells. This improvement is attributed to the complementary absorption and balanced crystallinity, which enhance the photocurrent and fill factor. The study demonstrates the potential of ternary blend structures in achieving higher efficiency organic solar cells.
研究不足
The study is limited by the specific materials used (PBDT-TPD, ITIC-4F, and C8IDTT-4Cl) and the fabrication conditions, which may not be universally applicable. The performance improvements are also dependent on the precise control of crystallinity and morphology.
1：Experimental Design and Method Selection:
The study involved the synthesis of a polymer donor PBDT-TPD and the fabrication of ternary organic solar cells by introducing a high crystallinity small-molecule acceptor C8IDTT-4Cl into a binary blend of PBDT-TPD and ITIC-4F.
2：4F. Sample Selection and Data Sources:
2. Sample Selection and Data Sources: The samples included the polymer donor PBDT-TPD, small-molecule acceptors ITIC-4F and C8IDTT-4Cl, and their blends.
3：List of Experimental Equipment and Materials:
Instruments used included a Bruker DMX-400 NMR Spectrometer, JASCO V-570 spectrophotometer, electrochemical workstation, AFM, TEM, and GIWAXS.
4：Experimental Procedures and Operational Workflow:
The OSCs were fabricated with an inverted structure, using CP as an additive, and underwent thermal and solvent vapor annealing.
5：Data Analysis Methods:
The charge carrier mobilities were measured using the SCLC method, and the molecular orientation and crystallinity were analyzed using GIWAXS.
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