Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 3, Issue 10, Pages 3792-3795Publisher
AMER CHEMICAL SOC
DOI: 10.1021/am201097p
Keywords
colloidal quantum dot; photovoltaics; electron-accepting electrode; hole-collecting electrode; open-circuit voltage
Funding
- King Abdullah University of Science and Technology (KAUST) [KUS-11-009-21]
- Ontario Research Fund Research Excellence Program
- Natural Sciences and Engineering Research Council (NSERC) of Canada
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Colloidal quantum dots (CgDs) enable multijunction solar cells using a single material programmed using the quantum size effect. Here we report the systematic engineering of 1.6 eV PbS CQD solar cells, optimal as the front cell responsible for visible-wavelength harvesting in tandem photovoltaics. We rationally optimize each of the device's collecting electrodes-the heterointerface with electron-accepting TiO(2) and the deep-work-function hole-collecting MoO(3) for ohmic contact-for maximum efficiency. We report an open-circuit voltage of 0.70 V; the highest observed in a colloidal quantum dot solar cell operating at room temperature. We report an AM1.5 solar power conversion efficiency of 3.5%, the highest observed in >1.5 eV bandgap CQD PV device.
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