Microalgae's polysaccharides, are they potent antioxidants? Critical review.

The scientific community continue to explore novel bioactive molecules by investigating natural origins; microalgae are photosynthetic organisms considered as a sustainable resource to use in many fields. They present a high diversity in species and richness in terms of attractive bio-compounds. The aim of this review is to (1) provide first an overview of current issues related to oxidative stress, and propose a natural metabolite derived from eukaryotic and prokaryotic microalgae; 'polysaccharides' as a powerful antioxidant agent, then, (2) organize the available data on the antioxidant potential of polysaccharides derived from the main microalgal groups (red microalgae, green microalgae, and cyanobacteria) and especially highlighted the key species of each group (Porphyridium sp.

Achieving above 24% efficiency with non-toxic CsSnI perovskite solar cells by harnessing the potential of the absorber and charge transport layers.

Lead toxicity is a barrier to the widespread commercial manufacture of lead halide perovskites and their use in solar photovoltaic (PV) devices. Eco-friendly lead-free perovskite solar cells (PSCs) have been developed using certain unique non- or low-toxic perovskite materials. In this context, Sn-based perovskites have been identified as promising substitutes for Pb-based perovskites due to their similar characteristics.

Harnessing the potential of CsPbBr-based perovskite solar cells using efficient charge transport materials and global optimization.

Perovskite solar cells (PSCs) have become a possible alternative to traditional photovoltaic devices for their high performance, low cost, and ease of fabrication. Here in this study, the SCAPS-1D simulator numerically simulates and optimizes CsPbBr-based PSCs under the optimum illumination situation. We explore the impact of different back metal contacts (BMCs), including Cu, Ag, Fe, C, Au, W, Pt, Se, Ni, and Pd combined with the TiO electron transport layer (ETL) and CFTS hole transport layer (HTL), on the performance of the devices.

Deep Insights into the Coupled Optoelectronic and Photovoltaic Analysis of Lead-Free CsSnI Perovskite-Based Solar Cell Using DFT Calculations and SCAPS-1D Simulations.

CsSnI is considered to be a viable alternative to lead (Pb)-based perovskite solar cells (PSCs) due to its suitable optoelectronic properties. The photovoltaic (PV) potential of CsSnI has not yet been fully explored due to its inherent difficulties in realizing defect-free device construction owing to the nonoptimized alignment of the electron transport layer (ETL), hole transport layer (HTL), efficient device architecture, and stability issues. In this work, initially, the structural, optical, and electronic properties of the CsSnI perovskite absorber layer were evaluated using the CASTEP program within the framework of the density functional theory (DFT) approach.

An extensive study on multiple ETL and HTL layers to design and simulation of high-performance lead-free CsSnCl-based perovskite solar cells.

Cesium tin chloride (CsSnCl) is a potential and competitive absorber material for lead-free perovskite solar cells (PSCs). The full potential of CsSnCl not yet been realized owing to the possible challenges of defect-free device fabrication, non-optimized alignment of the electron transport layer (ETL), hole transport layer (HTL), and the favorable device configuration. In this work, we proposed several CsSnCl-based solar cell (SC) configurations using one dimensional solar cell capacitance simulator (SCAPS-1D) with different competent ETLs like indium-gallium-zinc-oxide (IGZO), tin-dioxide (SnO), tungsten disulfide (WS), ceric dioxide (CeO), titanium dioxide (TiO), zinc oxide (ZnO), C, PCBM, and HTLs of cuprous oxide (CuO), cupric oxide (CuO), nickel oxide (NiO), vanadium oxide (VO), copper iodide (CuI), CuSCN, CuSbS, Spiro MeOTAD, CBTS, CFTS, P3HT, PEDOT:PSS.

Combined DFT, SCAPS-1D, and wxAMPS frameworks for design optimization of efficient CsBiAgI-based perovskite solar cells with different charge transport layers.

In this study, combined DFT, SCAPS-1D, and wxAMPS frameworks are used to investigate the optimized designs of CsBiAgI double perovskite-based solar cells. First-principles calculations are employed to investigate the structural stability, optical responses, and electronic contribution of the constituent elements in CsBiAgI absorber material, where SCAPS-1D and wxAMPS simulators are used to scrutinize different configurations of CsBiAgI solar cells. Here, PCBM, ZnO, TiO, C, IGZO, SnO, WS, and CeO are used as ETL, and CuO, CuSCN, CuSbS, NiO, P3HT, PEDOT:PSS, spiro-MeOTAD, CuI, CuO, VO, CBTS, CFTS are used as HTL, and Au is used as a back contact.

Effect of Various Electron and Hole Transport Layers on the Performance of CsPbI-Based Perovskite Solar Cells: A Numerical Investigation in DFT, SCAPS-1D, and wxAMPS Frameworks.

CsPbI has recently received tremendous attention as a possible absorber of perovskite solar cells (PSCs). However, CsPbI-based PSCs have yet to achieve the high performance of the hybrid PSCs. In this work, we performed a density functional theory (DFT) study using the Cambridge Serial Total Energy Package (CASTEP) code for the cubic CsPbI absorber to compare and evaluate its structural, electronic, and optical properties.

A new flavonoid glycoside from the aerial parts of (L.) DC. growing in Algeria.

The phytochemical study of the 70% ethanol extract of the aerial parts of afforded one new flavonoid glycoside, namely kaempferol-3--[-L-rhamnopyranosyl-(1→2)--D-xylopyranoside]-7---L-rhamnopyranoside (), named diploerucoside A and seven known compounds including one flavonoid (), one phenolic glycoside (), one monoterpene (), one triterpene (), one sitosterol () and two monoglycerolipids (, ). Their structures were established by extensive spectroscopic analysis including 1 D- and 2 D-NMR (H, C, H-H COSY, HSQC and HMBC), mass spectrometry (HR-ESI-MS) and by comparison with the data reported in the literature.