Analysis of metallic intermediate-band formation in photovoltaic materials

Energetics of formation of TiGa3As4 and TiGa3P4 intermediate band materials.

Using density functional theory quantum methods, total energy values and vibrational properties have been computed, and thermodynamic properties evaluated, for Ti-substituted GaAs and GaP, proposed as candidates for intermediate band photovoltaic cells. The calculations predict that the formation of these materials from the binary compounds implies an increase in total energy (that is ascribed ...

First Principle Calculations of Isolated Bands in Half Metallic Intermediate Band Materials

The field of nanostructure physics has been growing rapidly in recent years and much theoretical and experimental insight has been gained giving access to a more efficient device oriented applications. In the nanotechnology area one of the main objectives is the production of materials with specific characteristics from the bulk materials. In this context we present here the study of a quantum ...

the effect of authentic listening materials on the listening proficiency of efl learners in the intermediate level

having conducted the experiment and analysed the data, the researcher computed the groups mean scores and variances for the test relating to the research question. as the final atep, a t-test was conodonted for the hypothesis. as noted earlier, the significance level was determined at .05 and .01 respectively. the observed t-value was higher than the critical t-value at. 5 and .01 levels. conse...

Shear Band Formation in Bulk Metallic Glasses

In recent times, there has been a growing interest in the machining of amorphous metallic alloys, which are also called bulk metallic glasses (BMGs). These materials differ from common polycrystalline metallic alloys, because their atoms do not assemble on a crystalline lattice, and as a result, they have unique physical, mechanical, and chemical properties. A number of BMGs have been found to ...

Nonradiative Lifetimes in Intermediate Band Materials - Absence of Lifetime Recovery