TESE: Device physics of donor/acceptor-blend solar cells

Device physics of donor/acceptor-blend solar cells

Autor: Koster, Lambert Jan Anton

Faculdade de Ciências
Universidade de Groningen
(http://dissertations.ub.rug.nl/)



Harvesting energy directly from the Sun is a very attractive, but not an easy way ofproviding mankind with energy. Efficient, cheap, lightweight, flexible, and environmentallyfriendly solar panels are very desirable. Conjugated polymers bear the potentialof fulfilling these requisites. Due to their unique chemical makeup, these polymers canbe used as optoelectronically active materials, e.g., they can be optically excited and cantransport charge carriers.As compared to inorganic materials, polymers have (at least) one serious drawback:upon light absorption excitons are formed, rather than free charge carriers. A secondmaterial is needed to break up these excitons. A much used way of achieving this is tomix the polymer with a material that readily accepts the electrons, leaving the holes inthe polymer phase. As excitons in the polymer phase only move around for a couple ofnanometers before they decay to the ground state, it is vital to induce a morphology thatis characterized by intimate mixing of both materials (a so-called bulk heterojunction orBHJ)....


Tese disponivel para download:

http://dissertations.ub.rug.nl/faculties/science/2007/l.j.a.koster/


Fuente:

http://irs.ub.rug.nl/ppn/299329410