Directly deposited quantum dot solids using a colloidally stable nanoparticle ink

Abstract
We develop a photovoltaic colloidal quantum dot ink that allows for lossless, single-step coating of large areas in a manufacturing-compatible process. Our materials strategy involves a solution-phase ligand exchange to transport compatible linkers that yield 1-thioglycerol-capped PbS quantum dots in dimethyl sulfoxide with a photoluminescence quantum yield of 24%. A proof-of-principle solar cell made from the ink exhibits 2.1% power conversion efficiency. © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Citation
Fischer, A., Rollny, L., Pan, J., Carey, G. H., Thon, S. M., Hoogland, S., … Sargent, E. H. (2013). Directly Deposited Quantum Dot Solids Using a Colloidally Stable Nanoparticle Ink. Advanced Materials, 25(40), 5742–5749. doi:10.1002/adma.201302147

Acknowledgements
This publication is based in part on work supported by Award KUS-11-009-21 and GRP-CF-2011-21-P, made by King Abdullah University of Science and Technology (KAUST). The authors would also like to acknowledge Arash Simchi for taking the FiB-TEM images and especially to Joel A. Tang and Tim Burrows for their tremendous help with DOSY and CPMAS NMR measurements and interpretation. The authors further want to acknowledge the technical assistance and scientific guidance of E. Palmiano, R. Wolowiec, and D. Kopilovic. The authors wish to acknowledge the Canadian Foundation for Innovation, project number 19119, the Ontario Research Fund of the Centre for Spectroscopic Investigation of Complex Organic Molecules and Polymers, and the Natural Sciences and Engineering Research Council (NSERC) of Canada for funding.

Publisher
Wiley

Journal
Advanced Materials

DOI
10.1002/adma.201302147

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