Current Issue : January-March Volume : 2024 Issue Number : 1 Articles : 5 Articles
Perovskite materials have drawn a lot of interest recently due to their potential to increase solar cell efficiency. This study uses the solar cell capacitance simulator (SCAPS-1D) to develop and simulate a perovskite solar cell made of semiconductor materials. The design that has been suggested is Al:ZnO/ZnO/CdS/CsSnCl3 and MoS2. The analysis focuses on how different characteristics of the material affect the device’s performance. The analysis of the data reveals that the architecture had 26.15% power conversion efficiency (PCE). The solar cell creates an interest in developing a non-toxic solar cell with low manufacturing costs, outstanding conversion efficiency, and stability....
TCO (transparent conductive oxide) films are widely used in solar cells due to the characteristics of transparency and conductivity. In this paper, ITO (indium tin oxide) transparent conductive films are prepared on common slides by DC magnetron sputtering, and the preparation process and characteristics of ITO films are studied. The target for sputtering is ITO, with the mass ratio of In203 and Sn02 was 90% : 10%. The sheet resistance, carrier concentration, and carrier mobility of ITO films are measured and analyzed by a UV-Vis spectrophotometer, four-point probe, and Hall effect measurement system. By changing the oxygen content, deposition temperature, and sputtering power to studied the effects on the light transmittance and electrical conductivity of the ITO films, further studied the effects on the HJT (heterojunction with intrinsic thin film) solar cells, and finally determined the appropriate preparation parameters. Results show that the resistance is 6 4∗10−4 Ω•cm, the light transmittance is beyond 90.6%, efficiency is 23.78%, and bifacial ratio is 84% when oxygen content is 2.2%, sputtering power is 3 kw, and deposition temperature is 190°C....
Organic materials are known for their variety of molecules. Methods to predict the parameters of organic photovoltaic (OPV) cells are required to avoid the time- and resource- consuming processes of manufacturing and testing OPVs. Usually, the open-circuit voltage (Uoc) is estimated as the difference between the ionization energy level of the electron donor molecule (Id) and the electron affinity level of the electron acceptor molecule (EAa). Various measurement methods are used to determine the energy level values of pure materials, which, when combined with energy level shifts due to the donor:acceptor interactions, make these estimations less precise. In this work, photoconductivity measurements were applied to the donor:acceptor films. Near threshold energy, the electron can be directly transferred from the donor to the acceptor molecule. The obtained charge transfer energy (ECT) shows the difference between Id and EAa in the film. This difference was compared to the Uoc value of an OPV made of the same donor:acceptor combination. We show that this approach provides less scattered results and a higher correlation coefficient compared to the Uoc estimation using energy level values....
Perovskite solar cells (PSCs) have revolutionized the field of photovoltaics, achieving certified power conversion efficiencies reaching 26% at the laboratory scale. High performance, enhanced stability, and long lifetime are prerequisites for the industrialization and commercialization of this class of third-generation photovoltaic technology. Toward the development of well-performing and robust PSCs against environmental stresses, advanced engineering strategies have been employed, targeting the preparation of perovskite absorbing layers with minimal defects and energy-level fine-tuning hydrophobic contacts. Focusing on both the electron transport layer/perovskite and perovskite/hole transport layer interfaces, this review work encompasses some of the most promising engineering methodologies that were recently proposed in order to optimize the device architecture. Machine learning approaches have also been used to validate experimental data and predict with accuracy solar cell parameters, further confirming the significance and justifying the application potential of the proposed innovative interface functionalization approaches....
In the realm of renewable energy harvesting, nanomaterials doping with rare-earth ions is gaining traction. Lanthanum-doped ZnO thin films were synthesized using the sol–gel technique, with various La weight percentages. The X-ray diffraction (XRD) findings indicated that the hexagonal wurtzite structure of lanthanum-doped ZnO was maintained at various La weight percentage, despite a variation in the average crystallite size from 39 nm to 26 nm. The granule-like structure was examined using scanning electron microscopy (SEM), and the morphology remained unchanged with the inclusion of lanthanum. The direct energy bandgap was estimated to extend from 3.55 eV to 3.40 eV, revealing a discernible shift as the lanthanum concentration increased. The dc electrical conductivity of the films improved as the lanthanum doping in the ZnO lattice structure increased. Furthermore, increasing the La content altered the water contact angles from 51.5◦ to 26.4◦, making the surface more hydrophilic. These findings can allow for the ubiquitous development of nanostructures for photoanode materials made of metal oxides with future applications in DSSC devices....
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