منابع مشابه
Band-gap grading in Cu(In,Ga)Se2 solar cells
The quaternary system Cu(In,Ga)Se2 (CIGS) allows the band gap of the semiconductor to be adjusted over a range of 1.04–1.67 eV. Using a non-uniform Ga/In ratio throughout the film thickness, additional fields can be built into p-type CIGSbased solar cells, and some researchers have asserted that these fields can enhance performance. The experimental evidence that grading improves device perform...
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As an earth-abundant p-type semiconductor, copper sulfide (Cu2S) is an attractive material for application in photovoltaic devices. However, it suffers from a minority carrier diffusion length that is less than the length required for complete light absorption. Core-shell nanowires and nanorods have the potential to alleviate this difficulty because they decouple the length scales of light abso...
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Cu(In,Ga)Se2 thin films (CIGS) on metallic substrate (titanium, molybdenum, aluminum, stainless steel) were prepared by a two-step selenization of Co-evaporated metallic precursors in Se-containing environment under N2 gas flow. Structural properties of prepared thin film were studied. To characterize the optical quality and intrinsic defect nature low-temperature photoluminescence, were perfor...
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In the target article I argued that cognitive neuropsychologists have increasingly deviated from the original goals and methods of the subject. In this reply to the commentators, I argue that future progress using neuropsychological approaches to understanding behaviour is most likely to be made by the use of converging sources of evidence that are garnered by an interdisciplinary methodology. ...
متن کاملPromises, promises.
It’s easy to think that there is no problem facing medicine that information technology can’t solve. Experience in the US gives little reason for optimism. Huge investments havemostly failed to solve old problems and have created new ones. US doctors report spending two hours on computer tasks for every hour with patients (doi:10.7326/M16-0961). Poor usability and limited interoperability of el...
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ژورنال
عنوان ژورنال: Materials Today
سال: 2008
ISSN: 1369-7021
DOI: 10.1016/s1369-7021(08)70168-8