Nanowire-quantum-dot solar cells and the influence of nanowire length on the charge collection efficiency

Kurtis S. Leschkies; Alan G. Jacobs; David J. Norris; Eray S. Aydil

doi:10.1063/1.3258490

Nanowire-quantum-dot solar cells and the influence of nanowire length on the charge collection efficiency

Kurtis S. Leschkies, Alan G. Jacobs, David J. Norris, Eray S. Aydil

Chemical and Biomolecular Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

External quantum efficiency in solar cells based on junctions between PbSe quantum dots (QDs) and thin ZnO films is increased by replacing the ZnO films with a vertically oriented array of single-crystalline ZnO nanowires, and infiltrating this array with colloidal QDs. When illuminated with 100 mW/ cm² of simulated solar light, QD-nanowire solar cells exhibited power conversion efficiencies approaching 2%, approximately three times higher than that achieved with thin-film ZnO devices constructed with the same amount of QDs. Significant photocurrent and power conversion improvement with increasing nanowire length is consistent with higher exciton and charge collection efficiencies.

Original language	English (US)
Article number	193103
Journal	Applied Physics Letters
Volume	95
Issue number	19
DOIs	https://doi.org/10.1063/1.3258490
State	Published - 2009

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.3258490

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title = "Nanowire-quantum-dot solar cells and the influence of nanowire length on the charge collection efficiency",

abstract = "External quantum efficiency in solar cells based on junctions between PbSe quantum dots (QDs) and thin ZnO films is increased by replacing the ZnO films with a vertically oriented array of single-crystalline ZnO nanowires, and infiltrating this array with colloidal QDs. When illuminated with 100 mW/ cm2 of simulated solar light, QD-nanowire solar cells exhibited power conversion efficiencies approaching 2%, approximately three times higher than that achieved with thin-film ZnO devices constructed with the same amount of QDs. Significant photocurrent and power conversion improvement with increasing nanowire length is consistent with higher exciton and charge collection efficiencies.",

author = "Leschkies, {Kurtis S.} and Jacobs, {Alan G.} and Norris, {David J.} and Aydil, {Eray S.}",

note = "Funding Information: This work was supported by the NSF under the NIRT program (Grant No. CBET-0506672). Parts of this work was carried out in (i) the Institute of Technology (IT) Nanofabrication Center, which receives partial support from the NSF through the NNIN program and (ii) IT Characterization Facility, which has received capital equipment funding from the NSF through the MRSEC program.",

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doi = "10.1063/1.3258490",

language = "English (US)",

volume = "95",

journal = "Applied Physics Letters",

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T1 - Nanowire-quantum-dot solar cells and the influence of nanowire length on the charge collection efficiency

AU - Leschkies, Kurtis S.

AU - Jacobs, Alan G.

AU - Norris, David J.

AU - Aydil, Eray S.

N1 - Funding Information: This work was supported by the NSF under the NIRT program (Grant No. CBET-0506672). Parts of this work was carried out in (i) the Institute of Technology (IT) Nanofabrication Center, which receives partial support from the NSF through the NNIN program and (ii) IT Characterization Facility, which has received capital equipment funding from the NSF through the MRSEC program.

PY - 2009

Y1 - 2009

N2 - External quantum efficiency in solar cells based on junctions between PbSe quantum dots (QDs) and thin ZnO films is increased by replacing the ZnO films with a vertically oriented array of single-crystalline ZnO nanowires, and infiltrating this array with colloidal QDs. When illuminated with 100 mW/ cm2 of simulated solar light, QD-nanowire solar cells exhibited power conversion efficiencies approaching 2%, approximately three times higher than that achieved with thin-film ZnO devices constructed with the same amount of QDs. Significant photocurrent and power conversion improvement with increasing nanowire length is consistent with higher exciton and charge collection efficiencies.

AB - External quantum efficiency in solar cells based on junctions between PbSe quantum dots (QDs) and thin ZnO films is increased by replacing the ZnO films with a vertically oriented array of single-crystalline ZnO nanowires, and infiltrating this array with colloidal QDs. When illuminated with 100 mW/ cm2 of simulated solar light, QD-nanowire solar cells exhibited power conversion efficiencies approaching 2%, approximately three times higher than that achieved with thin-film ZnO devices constructed with the same amount of QDs. Significant photocurrent and power conversion improvement with increasing nanowire length is consistent with higher exciton and charge collection efficiencies.

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Nanowire-quantum-dot solar cells and the influence of nanowire length on the charge collection efficiency

Abstract

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