Solar donor/acceptor heterojunctions

Fig. 3 Contemporary organic solar cell devices are based on donor/acceptor heterojunction device architectures, (a) Energy level diagram, (b) Planar heterojunction conligmation. (c) Bulk heterojunction configuration...

Organic Donor-Acceptor Heterojunction Solar Cells... 

Organic Donor-Acceptor Heterojunction Solar Cells (a) (b) (c)... 

Fig. 18 Mechanism for donor-acceptor heterojunction solar cells. (7) Photoexitation of the donor to generate a Coulomb correlated electron-hole pair, an exciton. (2) Exciton diffusion to the D-A interface. A distance longer than the maximum diffusion length (max LD) will lead to relaxation of the exciton. (3) Bound exciton dissociation at the D-A interface to form a geminate pair. (4) Free charge transportation and collection at electrodes. Reprinted with pamission from ACS, Y.-J. Cheng, S.-H. Yang, and C.-S. Hsu, Synthesis of Conjugated Polymtax for Organic Solar Cell Applications Chem. Rev. 2009, 109, 5868-5923...

The aim of this chapter is to give a state-of-the-art report on the plastic solar cells based on conjugated polymers. Results from other organic solar cells like pristine fullerene cells [7, 8], dye-sensitized liquid electrolyte [9], or solid state polymer electrolyte cells [10], pure dye cells [11, 12], or small molecule cells [13], mostly based on heterojunctions between phthaocyanines and perylenes [14], will not be discussed. Extensive literature exists on the fabrication of solar cells based on small molecular dyes with donor-acceptor systems (see for example [2, 3] and references therein). 

Vandewal K, Tvingstedt K, Gadisa A, Inganas O, Manca JV (2010) Relating the open-circuit voltage to interface molecular properties of donor acceptor bulk heterojunction solar cells. Phys Rev B 81 125204... 

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