Materials Literature
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Epitaxial CdTe with high quality, low defect density, and high carrier concentration should in principle yield high-efficiency photovoltaic devices. However, insufficient effort has been given to explore the choice of substrate for high-efficiency epitaxial CdTe solar cells. In this paper, we use numerical simulations…
An improvement in efficiencies of polycrystalline CdTe can possibly be achieved by understanding the role of grain boundaries. Therefore, we systematically studied the atomic and electronic structures of various high angle grain boundaries including asymmetric tilt and twist grain boundaries using empirical potentials…
Warm-Mix Asphalt (WMA) technology is widely used in the paving industry due to its impact on reduction of asphalt mixing and compaction temperatures. Characterisation of WMA in the past had focused on evaluating the linear viscoelastic properties and associated Superpave specifications. In this study, evaluating the n…
We investigated the synthesis of kesterite Cu2ZnSnS4(CZTS) thin films using thermal evaporation from copper (Cu), zinc (Zn) and tin (Sn) pellets and post-annealing in a sulfur atmosphere. Two different metal precursor stacking orders (Cu/Sn/Zn/Cu and Cu/Sn/Cu/Zn) have been tested and experimental results prove that a…
In this work, a new type of WO3and V2O5photovoltaic cell were fabricated. The oxides were obtained by sol-gel route. Both V2O5and WO3presented a lamellar structure with d = 1.17 nm and 0.69 nm, respectively. From SEM of V2O5was observed ribbons and for WO3noted a presence of platelets. For WO3, increasing the distance…
Ti-containing Cu3N (Ti:Cu3N) thin films were deposited on Si(111), quartz, and stainless steel substrates using reactive dc magnetron sputtering at N2ambient. The significance of nitrogen pressure and that of Ti accommodation on structure and microstructure, composition, deposition rate, and mechanical hardness of the…
Use This work describes our early advances on the CdTe thin film deposition by drop-casting using aqueous CdTe colloidal dispersions. We synthesized water dispersible ammonium hydroxide - stabilized CdTe colloids to prepare dense and crack-free CdTe thin films by drop casting. The CdTe nanoparticles and thin films wer…
Silicon solar cells and perovskite solar cells were fabricated by non-vacuum printed processes in our group. Screen-printing, spin coating and spray pyrolysis deposition techniques were utilized mainly. Low temperature and non-vacuum processed TiO2layer and Al2O3layer and Al2O3/TiO2double layer were introduced as an a…
Os esforços de corte durante o torneamento de tarugos de alumina à verde e sua correlação com aspectos superficiais da peça foram estudados em condições experimentais. A correlação entre a força de usinagem e a taxa de remoção de material é um parâmetro importante na definição do projeto de produtos cerâmicos, já que,…
Marcel Rosenthal, on behalf of the JEDI collaboration; Investigation of Beam and Spin Dynamics for EDM Measurements at COSY, Microscopy and Microanalysis, Volum
In this work, we focus on the replacement of the commonly used but toxic Cd-based buffer layer by In2S3 thin films deposited by co-evaporation for application in Cu2ZnSnSe4 (CZTSe) solar cells. The impact of the deposition conditions of the buffer layer on the electrical behavior of CZTSe/In2S3 devices is first invest…
Electrophysical properties of the Li-Ti ferrite ceramics with the spinel structure (Li 0.649 Fe 1.598 Ti 0.5 Zn 0.2 Mn 0.051 O 4 ) are studied in the frequency interval 0.5–2.5 GHz at temperatures ranging from room temperature to 530 K. The thermal emf of the ferrite ceramic samples is studied. It is demonstrated that…
OBJECTIVE: In 2012 in New Jersey, a train derailment resulted in the puncture of a tanker car carrying liquid vinyl chloride under pressure, and a resulting airborne vinyl chloride plume drifted onto the grounds of a nearby refinery. This report details the investigation of exposures and symptoms among refinery worker…
The final word on 3D‐cinema entertainment value cannot be written until patrons experience stereo‐images of uncompromised quality. There has always been a performance cost associated with the addition of 3D, and as technology enables better 2D images, there is a threat that this situation will persist. We will examine…
The purpose of the study is to construct R8 peptide (RRRRRRRR) and pH sensitive polyethylene glycols (PEG) co-modified liposomes (Cl-Lip) and utilize them in breast cancer treatment. The co-modified liposomes were prepared with soybean phospholipid, cholesterol, DSPE-PEG2K-R8 and PEG5K-Hz-PE (pH sensitive PEG). The si…
Abstract A reaction between steroidal sapogenins and hydrogen sulfide promoted by BF3·Et2O is described. The thiodiosgenin and thiotigogenin comprising a sulfur atom on the F ring can be easily afforded in one step under this mild reaction condition. Furthermore, a hypothetical mechanism is also shown.
PURPOSE: The purpose of the present investigation was to increase the solubility and dissolution rate of celecoxib (CLX) by preparing microcrystals of drug by solvent change precipitation. METHODS: This procedure was optimized in order to obtain stable and homogeneous particles with a small particle size, high yield a…
Transparent transistors based on inorganic oxides have received attention in recent years due to their high performance and excellent optical transparency. For large area and flexible display applications, the development of a printing‐based route to realize these devices is particularly interesting due to the potenti…
We experimentally demonstrated an in‐plane switching (IPS) BPLC stabilized by linear photo‐polymerization (LPP) for the first time. The LPP‐process helps reduce response time by 2X and suppress hysteresis from 6.95% to 0.36%. It plays an important role to guide future BPLC material and device development as well as ma…
In this research controlled coating of magnetite (Fe3O4) nanoparticles with SiO2 was investigated. The Fe3O4 nanoparticles were synthesized via chemical co-precipitation and then coated by silica according to Stober method. Effects of tetra ethyl ortho silicate (TEOS) concentration and ethanol to TEOS on the coating t…