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Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
}
TY - JOUR
T1 - Photodetecting Heterostructures from Graphene and Encapsulated Colloidal Quantum Dot Films
AU - Black, Andrés
AU - Urbanos, Fernando
AU - Roberts, Jonathan
AU - Acebron, Maria
AU - Bernardo Gavito, Ramon
AU - Juarez, Beatriz H.
AU - Robinson, Benjamin
AU - Young, Robert
AU - Vazquez de Parga, Amadeo
AU - Granados, Daniel
PY - 2019/9/17
Y1 - 2019/9/17
N2 - Heterostructure devices consisting of graphene and colloidal quantum dots (QDs) have been remarkably successful as photodetectors and have opened the door to technological applications based on the combination of these low-dimensional materials. This work explores the photodetection properties of a heterostructure consisting of a graphene field effect transistor covered by a film of silica-encapsulated colloidal QDs. Defects at the surface of the silica shell trap optically excited charge carriers, which simultaneously enables photodetection via two mechanisms: photogating, resulting in a net p-doping of the device, and Coulombic scattering of charge carriers in the graphene, producing an overall decrease in the current magnitude.
AB - Heterostructure devices consisting of graphene and colloidal quantum dots (QDs) have been remarkably successful as photodetectors and have opened the door to technological applications based on the combination of these low-dimensional materials. This work explores the photodetection properties of a heterostructure consisting of a graphene field effect transistor covered by a film of silica-encapsulated colloidal QDs. Defects at the surface of the silica shell trap optically excited charge carriers, which simultaneously enables photodetection via two mechanisms: photogating, resulting in a net p-doping of the device, and Coulombic scattering of charge carriers in the graphene, producing an overall decrease in the current magnitude.
U2 - 10.1021/acsomega.9b01449
DO - 10.1021/acsomega.9b01449
M3 - Journal article
VL - 4
SP - 15824
EP - 15828
JO - ACS Omega
JF - ACS Omega
SN - 2470-1343
IS - 14
ER -