Read e-book online Advanced Characterization Techniques for Thin Film Solar PDF

By Daniel Abou-Ras, Thomas Kirchartz, Uwe Rau

ISBN-10: 3527410031

ISBN-13: 9783527410033

Written by means of scientists from best institutes in Germany, united states and Spain who use those strategies because the center in their clinical paintings and who've an actual inspiration of what's correct for photovoltaic units, this article includes concise and finished lecture-like chapters on particular examine methods.They specialize in rising, really expert ideas which are new to the sector of photovoltaics but have a confirmed relevance. although, seeing that new equipment have to be judged in line with their implications for photovoltaic units, a transparent introductory bankruptcy describes the fundamental physics of thin-film sun cells and modules, delivering a consultant to the explicit merits which are provided through every one person method.The number of matters is a consultant cross-section of these tools having fun with a excessive measure of visibility in contemporary clinical literature. additionally, they care for particular device-related subject matters and contain a range of fabric and surface/interface research equipment that experience lately confirmed their relevance. eventually, simulation options are offered which are used for ab-initio calculations of suitable semiconductors and for machine simulations in 1D and 2D.For scholars in physics, strong kingdom physicists, fabrics scientists, PhD scholars in fabric sciences, fabrics institutes, semiconductor physicists, and people operating within the semiconductor undefined, in addition to being appropriate as supplementary interpreting in similar classes.

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Thus, especially the achieved open-circuit voltages are far below the radiative limit. 5 and the major part of Chapter 2 will deal with understanding the efficiency limits resulting from all sorts of nonradiative recombination. It is important 1) Negative current density means here that the current density is opposite to the current density any passive element would have. A negative power density means then that energy is extracted from the device and not dissipated in the device as it would happen in a diode, which is not illuminated.

The most successful coeavaporation process is the so-called three-stage process [41] where first (In,Ga)2Se3 (likewise In, Ga, and Se from elemental sources to form that compound) is deposited at a lower temperatures (typically around 300  C). Then Cu and Se are evaporated at an elevated temperature and finally again In, Ga, and Se to ensure the overall In-rich composition of the film even if the material is Cu-rich during the second stage. The second class of absorber preparation routes is based on the separation of deposition and compound formation into two different processing steps.

Furthermore, the material features electronic metastabilities like persistent photoconductivity [51], which are theoretically explained by different light-induced defect relaxations [52]. However, final agreement on the observed metastability phenomena has not yet achieved, leaving an urgent need for further theoretical and experimental access to the complex defect physics of Cu(In, Ga)Se2 (for a review of the present status, see Ref. [48]). Some experimental and theoretical methods helpful for further research are outlined in Chapters 7 and 18 of this book.

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Advanced Characterization Techniques for Thin Film Solar Cells by Daniel Abou-Ras, Thomas Kirchartz, Uwe Rau

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