Journal
NATURE PHOTONICS
Volume 5, Issue 8, Pages 480-484Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/NPHOTON.2011.123
Keywords
-
Categories
Funding
- King Abdullah University of Science and Technology (KAUST) [KUS-11-009-21]
- Ontario Research Fund Research Excellent Program
- Natural Sciences and Engineering Research Council (NSERC) of Canada
- Ontario Ministry of Research and Innovation
- NSERC
- Angstrom Engineering and Innovative Technology
Ask authors/readers for more resources
Tuning of the electronic bandgap in colloidal quantum dots (CQDs) by changing their size enables the spectral response of CQD-based photodetectors(1-5) and photovoltaic(6-12) devices to be tailored. Multi-junction solar cells made from a combination of CQDs of differing sizes and thus bandgaps are a promising means by which to increase the energy harvested from the Sun's broad spectrum. Here, we report the first CQD tandem solar cells using the size-effect tuning of a single CQD material, PbS. We use a graded recombination layer to provide a progression of work functions from the hole-accepting electrode in the bottom cell to the electron-accepting electrode in the top cell, allowing matched electron and hole currents to meet and recombine. Our tandem solar cell has an open-circuit voltage of 1.06 V, equal to the sum of the two constituent single-junction devices, and a solar power conversion efficiency of up to 4.2%.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available