Enhanced Carrier Transport Distance in Colloidal PbS Quantum-Dot-Based Solar Cells Using ZnO Nanowires
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Other documents of the author: Wang, Haibin; González Pedro, Victoria; Kubo, Takaya; Fabregat-Santiago, Francisco; Bisquert, Juan; Sanehira, Yoshitaka
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comunitat-uji-handle2:10234/2507
comunitat-uji-handle3:10234/6973
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http://dx.doi.org/10.1021/acs.jpcc.5b09152 |
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Title
Enhanced Carrier Transport Distance in Colloidal PbS Quantum-Dot-Based Solar Cells Using ZnO NanowiresAuthor (s)
Date
2015-11Publisher
American Chemical SocietyISSN
1932-7447; 1932-7455Type
info:eu-repo/semantics/articlePublisher version
http://pubs.acs.org/doi/abs/10.1021/acs.jpcc.5b09152Version
info:eu-repo/semantics/publishedVersionSubject
Abstract
Nanostructured solar cells are a promising area of research for the production
of low cost devices that may eventually be capable of complementing or even replacing
present technologies in the field of solar power ... [+]
Nanostructured solar cells are a promising area of research for the production
of low cost devices that may eventually be capable of complementing or even replacing
present technologies in the field of solar power generation. The use of quantum dots (QDs) in
solar cells has evolved from being simple absorbers in dye-sensitized solar cells to sustaining
the double functions of absorbers and carrier transporters in full solid state devices. In this
work, we use both optical and electrical measurements to explore the diffusion limitations of
carrier transport in cells made of a heterostructure combining lead sulfide (PbS) QDs as
absorbers and hole carrier and zinc oxide nanowires as electron carrier material. The results
show efficient charge collection along the PbS-QD/ZnO nanowire (NW) hybrid structure.
This is because of the formation of band bending in the ZnO collector, allowing efficient
charge separation and spatially well-separated carrier pathways, yielding a hole transportation
of over 1 μm. We have also found a limitation in open-circuit voltage (Voc) associated with
band bending in the ZnO collector. [-]
Is part of
The Journal of Physical Chemistry C, 2015, vol. 119, núm. 49Rights
Copyright © 2015 American Chemical Society
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