Enhanced photoelectrochemical performance of quantum dot-sensitized solar cell using Cu co-doped CdS and CdSe nanoscrystals.

Today, nanoscrystals are researched and developed very quickly because of their advantages in many areas of life. One of the potential applications is quantum dot-sensitized solar cells. This is a green, clean, environmentally friendly cell, and has been studied by scientists since 2000.

Empowering Intelligent Surfaces and User Pairing for IoT Relaying Systems: Outage Probability and Ergodic Capacity Performance.

The evolution of Internet of Things (IoT) networks has been studied owing to the associated benefits in useful applications. Although the evolution is highly helpful, the increasing day-to-day demands of mobile users have led to immense requirements for further performance improvements such as efficient spectrum utilization, massive device connectivity, and high data rates. Fortunately, reconfigurable intelligent surfaces (RIS) and non-orthogonal multiple access (NOMA) techniques have recently been introduced as two possible current-generation emerging technologies with immense potential of addressing the above-mentioned issues.

The Influence of Dopant Concentration on Optical-Electrical Features of Quantum Dot-Sensitized Solar Cell.

In this study, TiO/CdS/CdCuSe, TiO/CdS/CdMnSe, and TiO/CdS/CdAgSe thin films were synthesized by chemical bath deposition for the fabrication of photoanode in quantum-dot-sensitized solar cells. As a result, the structural properties of the thin films have been studied by X-ray diffraction, which confirmed the zinc Blende structure in the samples. The optical films were researched by their experimental absorption spectra with different doping concentrations.

Pipercyclobutanamide D, a new member of the cyclobutanamide-type alkaloid, from the roots of .

From the EtOH-soluble extract of the roots of , one new dimeric alkamide, pipercyclobutanamide D () was isolated. Its structure was elucidated on the basis of NMR spectroscopic interpretation. The relative configuration of was determined based on the NOESY analysis.

A new furanochromone from the leaves of .

Phytochemical study on the EtOAc-soluble extract of the leaves of led to the isolation of a new furanochromone, 6,8-dihydroxy-2-methyl-9-furo[3,2-]chromen-9-one (), along with four known compounds (-). Their structures were elucidated based on the basis of the spectral interpretation. The plausible biosynthesis pathway for the formation of the new furanochromone was proposed.

Two new meroterpenoids from the aerial parts of (Vitaceae).

From EtOAc-soluble fraction of the aerial parts of (Vitaceae), two new meroterpenoids named ampechromonol A () and ampechromonol B (), together with five known compounds (-), were isolated. Their structures were elucidated based on NMR spectroscopic analysis. The plausible biosynthesis pathway for the formation of two new meroterpenoids was proposed.

A new lignan from the flowers of L. (Malvaceae).

From MeOH-soluble fraction of the flowers of (Malvaceae), one new lignan, (+)-4--methyl-5'-methoxy-secoisolariciresinol (), together with four known compounds (-) were isolated. The structures were elucidated based on NMR spectroscopic analysis. The absolute configuration of was determined based on the Cotton effects in the CD spectrum.

Chemical constituents of Geum urbanum L. roots.

A new dehydrodigallic acid derivative (1), along with 19 known compounds, including 6 phenolic derivatives, 2 steroids and 11 triterpenoids were isolated from the ethanol extract of the root of Geum urbanum. Herein, there is the first report of steroid and triterpene in Geum urbanum. The purified metabolites were characterised by NMR spectroscopic and mass spectrometric analyses.