The main applications of photoconductance measurements of silicon wafers are the determination of implicit device voltages, bulk minority carrier lifetimes, emitter recombination currents and surface recombination velocities. These applications are illustrated with selected experiments. Multicrystalline and single crystal silicon wafers are used with different surface conditions. The practical ...

In a network of quantum dots embedded in a semiconductor structure, no two are the same, and so their individual and collective properties must be measured after fabrication. Here, we demonstrate a ‘level anti-crossing spectroscopy’ (LACS) technique in which the ladder of orbital energy levels of one quantum dot is used to probe that of a nearby quantum dot. This optics-based technique can be a...

Lateral charge transport in a redox-active monolayer can be utilized for solar energy harvesting. A model porphyrin system was chosen to study the influence of the solvent on lateral hole hopping, which plays a crucial role in the charge-transfer kinetics. We examined the influence of water, acetonitrile, and propylene carbonate as solvents. Hole-hopping lifetimes varied by nearly 3 orders of m...

Adenoviruses are used extensively to deliver genes into mammalian cells, particularly where there is a requirement for high-level expression of transgene products in cultured cells, or for use as recombinant viral vaccines or in gene therapy. In spite of their usefulness, the construction of adenoviral vectors (AdV) is a cumbersome and lengthy process that is not readily amenable to the generat...

Colloidal Quantum Dot Photovoltaics In article number 2203749, Edward H. Sargent, Hyosung Choi, and co-workers demonstrate a random-oriented, but closed-packed organic bulk heterojunction structure realized by solvent selection compositional design. This enables excellent vertical charge conduction ultrafast hole funneling that minimizes recombination. By integrating the film as transport layer...

BiVO4 is a highly promising material for Photoelectrochemical (PEC) water splitting photoanodes due to its narrow band gap value (~2.4 eV) and ability efficiently absorb visible light. However, the short hole migration distance, severe surface complexation, low carrier separation efficiency limit application. Therefore, in this paper, was modified by loading CoOOH cocatalyst on rare earth eleme...

While transient photoluminescence measurements are a very popular tool to monitor the charge-carrier dynamics in field of halide perovskite photovoltaics, interpretation data obtained on multilayer samples is highly challenging due superposition various effects that modulate concentration layer and thereby measured PL. These include bulk interfacial recombination, charge transfer electron or ho...

Semiconductor quantum dots (QDs) acting as single-photon-emitters are potential building blocks for various applications in future information technology. For such applications, a thorough understanding and precise control of charge states capture/recombination dynamics the QDs vital. In this work, we study spontaneously formed GaNAsP nanowires, belonging to dilute nitride material system. By u...

Due to the pollution of dyeing and textile industry wastewaters in different colors and the need to remove these pollutants from the wastewaters, it is necessary to study and develop effective and efficient technology solutions required. To remove dye from aqueous solutions, photodegradation is employed as an effectively simple way. Thus, the BiOBr photocatalyst was chemically made by synthesis...