研究目的
To develop an ortho-ortho perylene diimide (PDI) dimer (oo-2PDI) as an efficient electron acceptor for green-solvent-processed organic solar cells (GSPOSCs) and to investigate its photovoltaic performance compared to PCBM-based devices.
研究成果
The ortho-ortho PDI dimer (oo-2PDI) demonstrated excellent potential as an efficient electron acceptor for GSPOSCs, achieving higher PCE values than PCBM-based devices under identical conditions. The favorable morphology, improved exciton dissociation, decreased charge recombination, and balanced charge transport contributed to the superior performance of oo-2PDI-based devices.
研究不足
The study focuses on the development of oo-2PDI as an electron acceptor for GSPOSCs and compares its performance with PCBM-based devices. However, the scalability and long-term stability of these devices under real-world conditions were not addressed.
1：Experimental Design and Method Selection:
The study involved the synthesis of oo-2PDI and its application as an electron acceptor in OSCs. The photovoltaic performance was evaluated using different processing solvents (CB, anisole, and ortho-xylene).
2：Sample Selection and Data Sources:
PBDTTT-C and PCBM were purchased from Derthon Optoelectronic Materials Co., and oo-2PDI was synthesized using a previously-reported method.
3：List of Experimental Equipment and Materials:
The study utilized UV–Vis absorption spectra, cyclic voltammetry (CV), atomic force microscopy (AFM), and space charge limited current (SCLC) method for characterization.
4：Experimental Procedures and Operational Workflow:
The OSCs were fabricated with a device structure of ITO/ZnO/active layer/MoO3/Al. The active layers were deposited by spin-coating from solutions with varying D/A ratios.
5：Data Analysis Methods:
The performance of the OSCs was analyzed based on J-V curves, EQE curves, and photoluminescence quenching efficiencies.
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