研究目的
Investigating the effect of PQT-12 interface layer on the performance of PCDTBT:PCBM based bulk heterojunction organic solar cells.
研究成果
The incorporation of FTM based PQT-12 as an interface layer between the active layer and HTL shows better performance and stability in PCDTBT:PCBM based bulk heterojunction organic solar cells. The device with PQT-12 interface layer achieved maximum values of JSC, VOC, FF, and PCE, demonstrating efficient carrier transfer at the interface and improved EQE.
研究不足
The measurements were carried out under a humid open atmosphere, which may affect the performance of the solar cells. The efficiency is relatively low under these conditions but serves the objective of demonstrating the improvement with the PQT-12 interface layer.
1：Experimental Design and Method Selection:
The study investigates the effect of PQT-12 as an interface layer in PCDTBT:PCBM based bulk heterojunction organic solar cells. The PQT-12 layer is deposited using the floating film transfer method (FTM).
2：Sample Selection and Data Sources:
The materials used include PCDTBT, PC61BM, PEDOT:PSS, and PQT-12. The ZnO quantum dots (QDs) are synthesized from zinc acetate dehydrate.
3：The ZnO quantum dots (QDs) are synthesized from zinc acetate dehydrate. List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: The devices are fabricated on ITO coated soda-lime glass substrates. The ZnO QDs solution is deposited by spin coating. The active layer is a blend of PCDTBT and PC61BM deposited by spin coating. The PQT-12 layer is deposited using FTM.
4：Experimental Procedures and Operational Workflow:
The fabrication process includes cleaning of ITO substrates, deposition of ZnO QDs, active layer, PQT-12 (for Device 2), PEDOT:PSS, and Ag electrode. The devices are characterized using UV/Vis/NIR spectroscopy, photoluminescence measurements, J-V characteristics, and impedance spectroscopy.
5：Data Analysis Methods:
The performance parameters of the solar cells are analyzed based on J-V characteristics and EQE measurements. The impedance spectroscopy data is modeled to obtain equivalent circuits.
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Spectrometer
FLS 980
Edinburgh Instruments
Used for measuring the photoluminescence from various thin film structures.
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Semiconductor parameter analyzer
B1500A
Keysight
Used for electrical characterization (current density versus voltage, J-V) of the solar cells.
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PCDTBT
Sigma-Aldrich
Used as an active polymer in the bulk heterojunction organic solar cells.
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PC61BM
Ossila
Used as an electron acceptor in the bulk heterojunction organic solar cells.
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PEDOT:PSS
Ossila
Used as a hole transport layer in the organic solar cells.
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PQT-12
American Dye Source
Used as an interface layer in the organic solar cells.
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ZnO QDs
Used as an electron transport layer in the organic solar cells.
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UV/Vis/NIR spectroscopy
V-750
Jesco
Used for measuring the optical absorbance by the thin films.
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Solar simulator
SS50AAA, A.M. 1.5G
Photo Emission Technology Inc.
Used for obtaining the standard solar spectrum.
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Monochromator
SP2150i
Princeton Instruments
Used for obtaining a discrete spectrum for calculating the external quantum efficiency (EQE).
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