研究目的
Investigating the optimization of graphene content in NiSe/Graphene nanohybrid counter electrode to boost the photovoltaic performance of dye-sensitized solar cells.
研究成果
The NiSe/GN0.50 nanohybrid exhibited superior photovoltaic performance than the Pt and pristine NiSe, with a higher efficiency (8.62%) than that fabricated with platinum (7.68%) and NiSe (7.18%) as CEs. This is due to the high electrical conductivity offered by graphene and exceptional catalytic activity of NiSe towards the tri-iodide reduction. The excellent electrochemical stability and photovoltaic performance of NiSe/GN0.50 nanohybrid counter electrode have a great potential for the substitution of Pt counter electrode for DSSC.
研究不足
The technical and application constraints of the experiments include the facile agglomeration leading to poor electronic conductivity, low material utilization, and poor electrocatalytic performance for the tri-iodide reduction reaction. Potential areas for optimization include the mass ratio between the NiSe and graphene to influence the electrochemical activity of the counter electrode.
1：Experimental Design and Method Selection:
NiSe nanoparticles were grown onto different mass ratios of graphene nanosheets (GN) by a facile in-situ hydrothermal process. The nanohybrids were characterized by FE-SEM, HR-TEM, XRD, Raman spectroscopy, and XPS studies.
2：Sample Selection and Data Sources:
Graphene oxide nanosheets (GO) were prepared by a modified Hummer’s method. NiSe/GN nanohybrids were synthesized with mass ratios of NiSe to GN of 1:
3：25,
4：50,
5：75, and
1.
6：List of Experimental Equipment and Materials:
00.
3. List of Experimental Equipment and Materials: FE-SEM (JSM, JEOL 7600F), HR-TEM (Philips, Model: CM 200), XPS (Kratos Analytical Ltd, Model: Kratos AXIS Ultra DLD), powder X-ray diffractometer (Rigaku, Ultima IV), confocal micro-Raman spectrometer (Renishaw RM 2000).
7：0).
Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: The CEs were fabricated by doctor blade technique. The DSSCs were assembled with N719 dye sensitized TiO2 photoanodes and the fabricated CE.
8：Data Analysis Methods:
Cyclic voltammetry (CV), electrochemical impedance (EIS), and Tafel polarization measurements were carried out to quantify the electrocatalytic ability of CE material.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
