研究目的
Investigating the effect of incorporating a thin PC71BM layer as an interlayer between the active layer and the electron transport layer in organic solar cells to enhance performance through improved phase separation, exciton dissociation, and charge transport.
研究成果
The incorporation of a PC71BM interlayer in inverted polymer solar cells significantly improves device performance by enhancing phase separation, exciton dissociation, and charge transport, leading to a high power conversion efficiency of 9.17%. This approach offers a simple and cost-effective strategy for performance enhancement.
研究不足
The study focuses on the specific system of PTB7:PC71BM and may not be directly applicable to other material systems. The optimization of spin-coating conditions for the PC71BM interlayer is crucial and may vary with different setups.
1：Experimental Design and Method Selection:
The study involved the fabrication of inverted polymer solar cells with a PC71BM interlayer to investigate its effects on phase separation and device performance.
2：Sample Selection and Data Sources:
ITO glass substrates were used as the base, with PTB7 and PC71BM as the active layer materials.
3：List of Experimental Equipment and Materials:
Instruments included a Keithley 2601 Source Measure Unit for J-V characteristics, a solar simulator for AM
4：5 G irradiation, and atomic force microscopy for morphology analysis. Experimental Procedures and Operational Workflow:
The process involved cleaning ITO substrates, spin-coating PEI and PC71BM layers, depositing the active layer, and completing the device with MoO3 and Ag layers.
5：Data Analysis Methods:
Performance parameters were extracted from J-V measurements, and morphology was analyzed using AFM and optical microscopy.
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