Effect of Organic and Inorganic Passivation in Quantum-Dot-Sensitized Solar Cells

The effect of semiconductor passivation on quantum-dot-sensitized solar cells (QDSCs) has been systematically characterized for CdS and CdS/ZnS. We have found that passivation strongly depends on the passivation agent, obtaining an enhancement of the solar cell efficiency for compounds containing am...

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Bibliographic Details
Published in:The journal of physical chemistry letters 2013-05, Vol.4 (9), p.1519-1525
Main Authors: de la Fuente, Mauricio Solis, Sánchez, Rafael S, González-Pedro, Victoria, Boix, Pablo P, Mhaisalkar, S. G, Rincón, Marina E, Bisquert, Juan, Mora-Seró, Iván
Format: Article
Language:English
Subjects:
Energy Conversion and Storage
Energy and Charge Transport
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Summary:The effect of semiconductor passivation on quantum-dot-sensitized solar cells (QDSCs) has been systematically characterized for CdS and CdS/ZnS. We have found that passivation strongly depends on the passivation agent, obtaining an enhancement of the solar cell efficiency for compounds containing amine and thiol groups and, in contrast, a decrease in performance for passivating agents with acid groups. Passivation can induce a change in the position of TiO2 conduction band and also in the recombination rate and nature, reflected in a change in the β parameter. Especially interesting is the finding that β, and consequently the fill factor can be increased with the passivation treatment. Applying this strategy, record cells of 4.65% efficiency for PbS-based QDSCs have been produced.
ISSN:1948-7185
1948-7185
DOI:10.1021/jz400626r