研究目的
To develop a low-cost, sustainable method for producing mesoporous titania thin films at room temperature using the enzyme papain in a dip-coating procedure, and to explore its application in organic/inorganic photovoltaic cells.
研究成果
The enzyme papain can be used in a room temperature dip-coating procedure to synthesize multilayered porous titania/papain thin films, offering a straightforward, low-cost, and ecological method to produce titania thin films with tunable thickness. The method shows promise for application in dye-sensitized and perovskite solar cells, as well as other products that contain titania functional layers.
研究不足
The study demonstrates the potential of the method for producing titania thin films and their application in photovoltaic devices, but the efficiency of the dye-sensitized solar cells produced is still low, indicating a need for further optimization.
1：Experimental Design and Method Selection:
The study employs a dip-coating procedure using the enzyme papain to synthesize titania thin films at room temperature. Techniques such as quartz crystal microbalance, positron annihilation Doppler broadening and lifetime spectroscopy, scanning electron microscopy, and X-ray diffraction are used to characterize the films.
2：Sample Selection and Data Sources:
Glass slides/QCM-D quartz chips are prepared and used as substrates for the dip-coating procedure. The enzyme solution is prepared from papain powder, and the TiBALDH solution is used for titania deposition.
3：List of Experimental Equipment and Materials:
QSense Analyzer and AT-cut quartz discs for QCM-D measurements, Dektak 8 profilometer for thickness measurements, X’pert PRO Philips/PANalytical X-ray diffractometer for XRD measurements, FEI Helios G4 CX Scanning Electron Microscope for SEM imaging and EDX experiments.
4：Experimental Procedures and Operational Workflow:
The dip-coating procedure involves immersing the substrate in papain solution, followed by immersion in TiBALDH solution, with water washes in between. The process can be iterated to produce multilayered films. Thermal annealing is performed to remove organic material and improve film properties.
5：Data Analysis Methods:
Data from QCM-D measurements are analyzed with QSense software. Positron annihilation data are analyzed using VEPFIT and POSWIN programs for Doppler broadening and lifetime spectroscopy, respectively.
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