Nanostructured Materials for Solar Energy Conversion - download pdf or read online

By Tetsuo Soga

Nanostructured fabrics for solar power Conversion covers a large choice of fabrics and machine kinds from inorganic fabrics to natural fabrics. This e-book bargains with uncomplicated semiconductor physics, modelling of nanostructured sun phone, nanostructure of traditional sun cells corresponding to silicon, CIS and CdTe, dye-sensitized sun telephone, natural sunlight cellphone, photosynthetic fabrics, fullerene, super skinny absorber (ETA) sun telephone, quantum dependent sunlight mobile, intermediate band sun telephone, carbon nanotube, and so on. together with simple precept and the most recent effects. there are numerous books written on traditional p-n junction sun cells, yet few books concentrate on new ideas during this region. * specializes in using nanostructured fabrics for solar power* appears to be like at a wide selection of fabrics and gadget forms* Covers either natural and inorganic fabrics

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When the electrolyte replacing material is an inorganic solid-state hole conductor like CuSCN [7] or CuI [8], the cells are called dye sensitized heterojunctions (DSHs), or interpenetrating heterojunctions (i-hets). The last step on the way from a Grätzel cell to an all solid-state solar cell is the replacement of the organic dye by a solid-state absorber like CdTe [9], a-Si [10], or CuInS2 [11]; the cells thus obtained are the so-called extremely thin absorber (ETA) cells [12]. In most of these cells however, the hole conductor is just the metal contact which penetrates the pores like a hole conductor would do.

An example of a nano-structured solar cell. The hatched phase is an electron transporting material, for example, the fullerene-derivate PCBM, and is only contacted by the left-hand-side electrode. The white phase is a hole-transporting material, for example, the PPV derivate MDMO-PPV, and is only contacted by the right-hand-side electrode. The phenomena of photon absorption, generation and separation of an electron and a hole, and transport of the carriers to the electrodes are shown schematically.

In organic photovoltaic materials including most polymers and fullerenes, the assumption is justified; indeed, ambipolar conduction is rarely reported in these materials. Thus, we assume that the position of EFn(abs) in the p-absorber and of EFp(TiO2) in the TiO2 is irrelevant: we only need to know EFp(abs) and EFn(TiO2). We already know that EFn (TiO2 ) Ϫ EFp (absorber ) ϭ qVd (3) To determine the position of one of the two relevant Fermi levels, we express that the total charge should be zero in a unit cell of a periodic structure.

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