研究目的
To compare the efficiency of perovskite solar cells fabricated with and without electron and hole transporting layers.
研究成果
The study successfully fabricated and compared the efficiency of four perovskite solar cell configurations. The presence of both ETL and HTM layers resulted in the highest PCE of 13.8%. The research underscores the importance of these layers in achieving high efficiency and suggests the potential for future optimization of HTM and ETL-free architectures.
研究不足
The study highlights the reduction in efficiency when HTM and ETL layers are removed, suggesting the need for further optimization to enhance the performance of HTM and ETL-free perovskite solar cells.
1：Experimental Design and Method Selection:
The study involved the fabrication of four types of perovskite solar cells with varying configurations of electron and hole transporting layers. The spin-coating method was used for layer deposition.
2：Sample Selection and Data Sources:
Fluorine doped tin oxide (FTO) glasses were used as substrates. The materials included titanium isopropoxide, TiO2 paste, methyl amine, hydrobromic acid, lead bromide, dimethyl formamide, and Spiro-OMeTAD.
3：List of Experimental Equipment and Materials:
X-ray diffraction (XRD), scanning electron microscope (SEM), UV-Vis spectroscopy, and solar simulator were used for characterization and measurements.
4：Experimental Procedures and Operational Workflow:
The substrates were washed, and layers were deposited sequentially, including compact TiO2, mesoporous TiO2, perovskite (CH3NH3PbBr3), and Spiro-OMeTAD, followed by thermal annealing and electrode deposition.
5：Data Analysis Methods:
XRD, SEM, UV-Vis spectroscopy, and IV measurements were used to analyze the structural, morphological, optical properties, and efficiency of the solar cells.
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Flourine doped tin oxide (FTO) glasses
Used as substrate in all four perovskite solar cells.
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Titanium dioxide (TiO2) paste
Dyesol 18 NR-T
Dyesol
Used as electron transporting layer (ETL).
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2,2',7,7'-Tetrakis[N,N-di(4-methoxyphenyl)amino]-9,9'-pirobifluorene (Spiro-OMeTAD)
Used as hole transporting layer (HTM).
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X-ray diffraction (XRD)
Used for surface structure characterization.
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Scanning electron microscope (SEM)
Used for surface morphology analysis.
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UV-Vis spectroscopy
Utilized for optical properties and bandgap measurements.
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Solar simulator
Used for current voltage measurements.
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