研究目的
Investigating the application of non-fullerene acceptors in bulk-heterojunction polymer solar cells to overcome the inherent drawbacks of fullerene derivatives-based acceptors.
研究成果
The study concludes that TPD-based wide-bandgap polymers can be potential donor materials in NF-PSCs with small molecular acceptors, highlighting the importance of driving forces between donor and acceptor materials for device performance.
研究不足
The study acknowledges the trade-off between VOC and JSC in PSCs and suggests further investigation into the relationship between device stabilities and thermal treatment conditions to improve PSC stabilities.
1：Experimental Design and Method Selection:
The study involved the synthesis of two TPD-based polymers and their blending with small molecular acceptors ITIC and IDIC to fabricate photovoltaic devices. The methodology included Stille coupling reaction for polymer synthesis and Knoevenagel condensation reactions for acceptor synthesis.
2：Sample Selection and Data Sources:
The samples were the synthesized polymers PBDT-TPD and PBDTT-TPD, and acceptors ITIC and IDIC. Data sources included UV-Vis-NIR absorption spectra, cyclic voltammetry, and photovoltaic device measurements.
3：List of Experimental Equipment and Materials:
Instruments used included a gel permeation chromatography (GPC) instrument, CHI 660D Electrochemical Workstation, UV-Vis-NIR spectrometer (Lambda 750, Perkin Elmer), and atomic force microscopy (AFM). Materials included the synthesized polymers and acceptors, ZnO, MoO3, and Al for device fabrication.
4：Experimental Procedures and Operational Workflow:
The procedure involved polymer and acceptor synthesis, device fabrication with an inverted architecture, and characterization including J-V measurements and EQE responses.
5：Data Analysis Methods:
Data analysis involved calculating energy levels from CV measurements, determining PCE from J-V characteristics, and analyzing morphology through AFM and XRD.
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