Photovoltaics organic cells

Photovoltaic cells can be divided into three categories (1) inorganic cells, based on solid-state inorganic semiconductors (2) organic cells, based on organic... 

Organic photovoltaics Photoelectrochemical cells Electrochromic devices Sensors... 

In an organic donor-acceptor (D-A) heterojunction (HJ) photovoltaic (PV) cell, the entire PV process consists of four consecutive steps photon absorption by either donor or acceptor molecules to generate excitons, diffusion of... 

Schlettwein, Yoshida, and Lincot provide a critical review of the research literature on porous zinc oxide sensitized by organic dyes, and the potential use of these materials for the development of large-scale photovoltaic solar cells. An introduction is provided to the electrodeposition of zinc oxide thin films, their means of sensitization by a variety of organic molecules, and their preparation by one-step deposition from solutions containing water-soluble dyes to produce hybrid materials suitable for solar cell. The advantages of various substrates for large-scale cells are discussed for plastic and textile materials. 

There are several reasons to use organic materials for photovoltaic solar cell applications. Most important is the peculiar advantages of organic... 

These problems may be overcome by the use of organic photovoltaic solar cells [117-120], which consist of a donor and an acceptor material, each possessing its individual HOMO and LUMO energy levels. For an efficient device configuration, the HOMO and LUMO energy levels of the donor material must be higher com-... 

Keywords Fullerene Liquid crystals Self-assembled mrxiolayers Photovoltaics Organic solar cells... 

An alternative inexpensive organic polymer-based photovoltaic solar cell has been invented. In this device, p-type and n-type semiconductors are sequentially stacked on top of each other. In such devices, absorption of a photon by a ji-conjugated polymer results in the formation of an excited state, where coulom-bicaUy bound electron-hole pair (exciton) is created. This exciton diffuses to a region of interface of n-type semiconductor where exciton dissociation takes place and transport of charge to the respective electrodes occurs. For example, the photo-induced electron transfer from a donor layer (p-type) to acceptor layer (n-type) takes place in a polymer/fullerene-based organic bilayer solar cell, MDMO-PPV PCBM, with power conversion efiiciency of 2.5 % (Fig. 11.8) [13]. 

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