ZnO−Al 2 O 3 and ZnO−TiO 2 Core−Shell Nanowire Dye-Sensitized Solar Cells
Lawrence Berkeley National Laboratory · University of California, Berkeley
Abstract
We describe the construction and performance of dye-sensitized solar cells (DSCs) based on arrays of ZnO nanowires coated with thin shells of amorphous Al(2)O(3) or anatase TiO(2) by atomic layer deposition. We find that alumina shells of all thicknesses act as insulating barriers that improve cell open-circuit voltage (V(OC)) only at the expense of a larger decrease in short-circuit current density (J(SC)). However, titania shells 10-25 nm in thickness cause a dramatic increase in V(OC) and fill factor with little current falloff, resulting in a substantial improvement in overall conversion efficiency, up to 2.25% under 100 mW cm(-2) AM 1.5 simulated sunlight. The superior performance of the ZnO-TiO(2)…
Citation impact
- FWCI
- 28.17
- Percentile
- 100%
- References
- 60
Authors
6- MLMatt LawCorresponding
Lawrence Berkeley National Laboratory, University of California, Berkeley
- LELori E. Greene
University of California, Berkeley, Lawrence Berkeley National Laboratory
- ARAleksandra Rađenović
Lawrence Berkeley National Laboratory, University of California, Berkeley
- TKTevye Kuykendall
University of California, Berkeley, Lawrence Berkeley National Laboratory
- JLJan Liphardt
Lawrence Berkeley National Laboratory, University of California, Berkeley
Topics & keywords
- Nanowire
- Dye-sensitized solar cell
- Materials science
- Anatase
- Atomic layer deposition
- Amorphous solid
- Energy conversion efficiency
- Current density
- Affordable and clean energy