Elementary Processes in Organic Photovoltaics by Karl Leo PDF

By Karl Leo

ISBN-10: 3319283367

ISBN-13: 9783319283364

ISBN-10: 3319283383

ISBN-13: 9783319283388

This quantity offers the result of a multi-year examine programme funded through the Deutsche Forschungsgemeinschaft (German examine Council), and is the reason how natural sun cells paintings. during this new promising photovoltaic know-how, carbon-based fabrics are deposited via reasonably cheap tools onto versatile substrates, hence permitting units which open thoroughly new functions like obvious coatings for development, sun cells built-in into garments or programs, and plenty of extra. The research of natural sunlight cells is an interdisciplinary subject, masking physics, chemistry and engineering. different chapters tackle themes starting from the synthesis of recent natural fabrics, to the characterization of the common tactics equivalent to exciton delivery and separation, and the rules of hugely effective equipment design.

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If the morphology has been measured, is it then possible to predict the device performance with a suitable physical device model? A more daunting challenge is to rationalize the relationship between processing conditions and the resulting morphology. In the next sections we address these issues for two examples: polymer–metal oxide and polymer–fullerene blends. 1 Polymer–Metal Oxide Solar Cells An elegant way of fabricating hybrid polymer–metal oxide solar cells is via depositing a semiconducting polymer and a metal oxide precursor from solution in which the precursor is converted by reacting with water from the ambient to form a metal oxide network inside the polymer.

1 Thiophene Dendrimers Functionalized at the Periphery . . . . . . . . . . . . . . . . . . 2 Thiophene Dendrimers Functionalized in the Branches or at the Core . . . . . . . . . . 3 Thiophene Dendrimers with Extended Branches . . . . . . . . . . . . . . . . . . . . . 3 Morphology and Performance of Hybrid and Polymer Solar Cells . . . . . . . . . . . . . . 1 Polymer–Metal Oxide Solar Cells . .

Mishra et al. scales with the normalized drying rate; that is, the drying rate normalized to the final thickness of the film. The scaling is valid over two orders of magnitude and has been verified for several material combinations. The normalized drying rate can be related to two possible “determinants” of domain size: (1) the quench rate, which would determine length scales by the amplification of an initial length scale by spinodal decomposition (early stage); or (2) to the coarsening time, in which the growth of already existing domains can take place (late stage, for example, Ostwald ripening).

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Elementary Processes in Organic Photovoltaics by Karl Leo

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