Abstract
Hybrid organic-inorganic heterostructures are attracting tremendous attention for optoelectronic applications due to their low-cost processing and high performance in devices. In particular, van der Waals p-n heterojunctions formed between inorganic two-dimensional (2D) materials and organic semiconductors are of interest due to the quantum confinement effects of 2D materials and the synthetic control of the physical properties of organic semiconductors, enabling a high degree of tunable optoelectronic properties for the heterostructure. However, for photovoltaic applications, hybrid 2D-organic heterojunctions have demonstrated low power conversion efficiencies due to the limited absorption from constraints on the physical thickness of each layer. Here, we investigate the ultrafast charge transfer dynamics between an organic polymer:fullerene blend and 2D n-type MoS2 using transient pump-probe reflectometry. We employ plasmonic metasurfaces to enhance the absorption and charge photogeneration within the physically thin hybrid MoS2-organic heterojunction. For the hybrid MoS2-organic heterojunction in the presence of the plasmonic metasurface, the charge generation within the polymer is enhanced 6-fold, and the total active layer absorption bandwidth is increased by 90 nm relative to the polymer:fullerene blend alone. We demonstrate that MoS2-organic heterojunctions can serve as hybrid solar cells, and their efficiencies can be improved using plasmonic metasurfaces.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 9899-9908 |
| Number of pages | 10 |
| Journal | ACS Nano |
| Volume | 10 |
| Issue number | 11 |
| DOIs | |
| State | Published - Nov 22 2016 |
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All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Engineering(all)
- Physics and Astronomy(all)
Keywords
- charge transfer
- hybrid organicinorganic heterostructures
- plasmonic metasurfaces
- solar energy
- two-dimensional materials
- ultrafast pump-probe dynamics
Cite this
}
Ultrafast Charge Transfer and Enhanced Absorption in MoS2-Organic van der Waals Heterojunctions Using Plasmonic Metasurfaces. / Petoukhoff, Christopher E.; Krishna, M. Bala Murali; Voiry, Damien; Bozkurt, Ibrahim; Deckoff-Jones, Skylar; Chhowalla, Manishkumar; O'Carroll, Deirdre; Dani, Keshav M.
In: ACS Nano, Vol. 10, No. 11, 22.11.2016, p. 9899-9908.Research output: Contribution to journal › Article
TY - JOUR
T1 - Ultrafast Charge Transfer and Enhanced Absorption in MoS2-Organic van der Waals Heterojunctions Using Plasmonic Metasurfaces
AU - Petoukhoff, Christopher E.
AU - Krishna, M. Bala Murali
AU - Voiry, Damien
AU - Bozkurt, Ibrahim
AU - Deckoff-Jones, Skylar
AU - Chhowalla, Manishkumar
AU - O'Carroll, Deirdre
AU - Dani, Keshav M.
PY - 2016/11/22
Y1 - 2016/11/22
N2 - Hybrid organic-inorganic heterostructures are attracting tremendous attention for optoelectronic applications due to their low-cost processing and high performance in devices. In particular, van der Waals p-n heterojunctions formed between inorganic two-dimensional (2D) materials and organic semiconductors are of interest due to the quantum confinement effects of 2D materials and the synthetic control of the physical properties of organic semiconductors, enabling a high degree of tunable optoelectronic properties for the heterostructure. However, for photovoltaic applications, hybrid 2D-organic heterojunctions have demonstrated low power conversion efficiencies due to the limited absorption from constraints on the physical thickness of each layer. Here, we investigate the ultrafast charge transfer dynamics between an organic polymer:fullerene blend and 2D n-type MoS2 using transient pump-probe reflectometry. We employ plasmonic metasurfaces to enhance the absorption and charge photogeneration within the physically thin hybrid MoS2-organic heterojunction. For the hybrid MoS2-organic heterojunction in the presence of the plasmonic metasurface, the charge generation within the polymer is enhanced 6-fold, and the total active layer absorption bandwidth is increased by 90 nm relative to the polymer:fullerene blend alone. We demonstrate that MoS2-organic heterojunctions can serve as hybrid solar cells, and their efficiencies can be improved using plasmonic metasurfaces.
AB - Hybrid organic-inorganic heterostructures are attracting tremendous attention for optoelectronic applications due to their low-cost processing and high performance in devices. In particular, van der Waals p-n heterojunctions formed between inorganic two-dimensional (2D) materials and organic semiconductors are of interest due to the quantum confinement effects of 2D materials and the synthetic control of the physical properties of organic semiconductors, enabling a high degree of tunable optoelectronic properties for the heterostructure. However, for photovoltaic applications, hybrid 2D-organic heterojunctions have demonstrated low power conversion efficiencies due to the limited absorption from constraints on the physical thickness of each layer. Here, we investigate the ultrafast charge transfer dynamics between an organic polymer:fullerene blend and 2D n-type MoS2 using transient pump-probe reflectometry. We employ plasmonic metasurfaces to enhance the absorption and charge photogeneration within the physically thin hybrid MoS2-organic heterojunction. For the hybrid MoS2-organic heterojunction in the presence of the plasmonic metasurface, the charge generation within the polymer is enhanced 6-fold, and the total active layer absorption bandwidth is increased by 90 nm relative to the polymer:fullerene blend alone. We demonstrate that MoS2-organic heterojunctions can serve as hybrid solar cells, and their efficiencies can be improved using plasmonic metasurfaces.
KW - charge transfer
KW - hybrid organicinorganic heterostructures
KW - plasmonic metasurfaces
KW - solar energy
KW - two-dimensional materials
KW - ultrafast pump-probe dynamics
UR - http://www.scopus.com/inward/record.url?scp=84997079761&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84997079761&partnerID=8YFLogxK
U2 - 10.1021/acsnano.6b03414
DO - 10.1021/acsnano.6b03414
M3 - Article
AN - SCOPUS:84997079761
VL - 10
SP - 9899
EP - 9908
JO - ACS Nano
JF - ACS Nano
SN - 1936-0851
IS - 11
ER -