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

By Daniel Abou-Ras, Thomas Kirchartz, Uwe Rau

Written via scientists from major institutes in Germany, united states and Spain who use those strategies because the middle in their medical paintings and who've an actual suggestion of what's appropriate for photovoltaic units, this article comprises concise and complete lecture-like chapters on particular examine methods.They specialise in rising, really good ideas which are new to the sphere of photovoltaics but have a confirmed relevance. notwithstanding, considering that new equipment must be judged in accordance with their implications for photovoltaic units, a transparent introductory bankruptcy describes the elemental physics of thin-film sunlight cells and modules, delivering a consultant to the explicit benefits which are provided via every one person method.The collection of matters is a consultant cross-section of these equipment having fun with a excessive measure of visibility in fresh clinical literature. in addition, they care for particular device-related issues and comprise a variety of fabric and surface/interface research equipment that experience lately confirmed their relevance. ultimately, simulation strategies are offered which are used for ab-initio calculations of suitable semiconductors and for equipment simulations in 1D and 2D.For scholars in physics, reliable country 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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Again, the specific features of photovoltaic thin films like the importance of dangling bonds and hydrogen passivation in disordered Si, the need for physical and chemical material analysis on the nanometer scale, or the prominence of interface chemistry and physics in thinfilm solar cells define the focus of these chapters. Chapters 18–20 at the end of this handbook deal with the theoretical description of materials and devices. Ab-initio modeling of semiconductor materials is indispensable, because even the basic physical properties of some of the wide variety of compounds and alloys used in thin-film photovoltaics are not satisfactorily known.

12b is similar to the situation for Cu(In, Ga)Se2 devices. In CdTe solar cells this is basically a result of the CdCl2 activation process and of intermixing [73]. 1 Hydrogenated Amorphous Si (a-Si:H) Central to the working principle of semiconductors is the forbidden energy gap derived from the periodicity of the crystal lattice. However, it is exactly this strict periodicity that is lacking in amorphous semiconductors, which have a short-range order but no long-range order as their crystalline counterparts.

For high values of t, Voc saturates for both p–i–n- and p–n-junction solar cells. This saturation is due to surface recombination, which limits the maximum attainable open-circuit voltage Voc. 3 Functional Layers in Thin-Film Solar Cells Until now, we have discussed the photovoltaic effect, the requirements for the material properties to come close to a perfect solar cell and the possible geometries to separate and extract charge carriers. In typical crystalline silicon solar cells, nearly all these requirements and tasks have to be fulfilled by the silicon wafer itself.

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