Effects of physical orientation of dye molecules and molecular orbitals on performance of solid-state dye sensitized solar cells

Performance of Dye-sensitized devices depends on the photon absorption and carrier injection properties of the sensitizer (dye). The orientation of the dye molecule affects the photon absorption cross-section, injection efficiency and carrier transport. These effects are studied, using three variant...

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Bibliographic Details
Published in:Materials today : proceedings 2020-01, Vol.23 (Pt 1), p.43-48
Main Authors: Pitigala, P.K.D.D.P., Henary, M.M., Perera, A.G.U.
Format: Article
Language:English
Subjects:
Cyanine dye
Dye solar cells
HOMO/LUMO
Molecular orbitals
Molecule-orientation
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Summary:Performance of Dye-sensitized devices depends on the photon absorption and carrier injection properties of the sensitizer (dye). The orientation of the dye molecule affects the photon absorption cross-section, injection efficiency and carrier transport. These effects are studied, using three variants of cyanine dyes in n-TiO2/Dye/p-CuSCN heterojunction. The results show correlation of dye-molecule’s orientation on the short-circuit-photocurrent (Isc). The open-circuit-voltage (Voc) is also subjective. The orientation of the dye molecule influence the photon-harvesting efficiency and obstruct the hole-conductor penetrating onto the working-electrode. Additionally, Cumulative effects of e-e, e-h, spin-coupling and HOMO/LUMO distribution are identified.
ISSN:2214-7853
2214-7853
DOI:10.1016/j.matpr.2019.06.189