研究目的
Investigating the effects of graphene quantum dots (GQDs) with different lateral sizes on the performance of inverted organic solar cells based on P3HT:PCBM blend films.
研究成果
The introduction of GQDs with different lateral sizes into P3HT:PCBM solar cells significantly enhances their power conversion efficiency. The band structures of GQDs, tuned by their lateral size, are crucial for their photovoltaic performance as additives. The study provides insights into the mechanism of GQDs size effect on device performance, offering a pathway for improving organic solar cells.
研究不足
The study focuses on the size effect of GQDs on the performance of P3HT:PCBM solar cells. The influence of other factors such as edge functionalization or doping concentration beyond the studied range is not explored. The scalability and long-term stability of the devices are not addressed.
1：Experimental Design and Method Selection:
The study involved preparing three kinds of GQDs with different lateral sizes using photon-Fenton reaction and separating them through gel column chromatography. The effects of these GQDs on the photovoltaic performances of inverted organic solar cells were systematically studied.
2：Sample Selection and Data Sources:
The samples included P3HT:PCBM blend films with and without GQDs. The GQDs were characterized using AFM imaging, TEM, PL, and UV-vis spectra measurements.
3：List of Experimental Equipment and Materials:
Equipment used includes AFM, TEM, UV-vis spectrophotometer, PL spectrofluorometer, and a solar simulator for J-V characteristics measurement. Materials include P3HT, PCBM, GQDs, and other chemicals for device fabrication.
4：Experimental Procedures and Operational Workflow:
The GQDs were prepared and separated, then incorporated into the active layers of solar cells. The devices were fabricated and their photovoltaic performances were measured under AM 1.5 G irradiation.
5：5 G irradiation.
Data Analysis Methods:
5. Data Analysis Methods: The photovoltaic parameters (Jsc, Voc, FF, PCE) were analyzed to evaluate the performance enhancement due to GQDs. The band structures of GQDs were analyzed using cyclic voltammetry.
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