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Structural, Optical, and Electrical Properties of Self-Assembled Films of PbSe Nanocrystals Treated with 1,2-Ethanedithiol
Abstract
We describe the structural, optical, and electrical properties of high-quality films of PbSe nanocrystals fabricated by a layer-by-layer (LbL) dip-coating method that utilizes 1,2-ethanedithiol (EDT) as an insolubilizing agent. Comparative characterization of nanocrystal films made by spin-coating and by the LbL process shows that EDT quantitatively displaces oleic acid on the PbSe surface, causing a large volume loss that electronically couples the nanocrystals while severely degrading their positional and crystallographic order of the films. Field-effect transistors based on EDT-treated films are moderately conductive and ambipolar in the dark, becoming p-type and 30-60 times more conductive under 300 mW cm(-2) broadband illumination. The nanocrystal films oxidize rapidly in air to yield, after short air exposures, highly conductive p-type solids. The LbL process described here is a general strategy for producing uniform, conductive nanocrystal films for applications in optoelectronics and solar energy conversion.
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Cited by
Tang, J., Brzozowski, L., Barkhouse, D. A. R., Wang, X., Debnath, R., Wolowiec, R., Palmiano, E., Levina, L., Pattantyus-Abraham, A. G., Jamakosmanovic, D., et al. (2010) · ACS Nano · doi:10.1021/nn901564q · Cited by 392
Stability Assessment on a 3% Bilayer PbS/ZnO Quantum Dot Heterojunction Solar Cell
Luther, J. M., Gao, J., Lloyd, M. T., Semonin, O. E., Beard, M. C., & Nozik, A. J. (2010) · Advanced Materials · doi:10.1002/adma.201001148 · Cited by 386
Self-citationInfrared photovoltaics made by solution processing
Sargent, E. H. (2009) · Nature Photonics · doi:10.1038/nphoton.2009.89 · Cited by 351
A Chemically Orthogonal Hole Transport Layer for Efficient Colloidal Quantum Dot Solar Cells
Biondi, M., Choi, M., Ouellette, O., Baek, S., Todorović, P., Sun, B., Lee, S., Wei, M., Li, P., Kirmani, A. R., et al. (2020) · Advanced Materials · doi:10.1002/adma.201906199 · Cited by 106
Sarkar, R., Farghaly, A. A., & Arachchige, I. U. (2022) · Chemistry of Materials · doi:10.1021/acs.chemmater.2c00717 · Cited by 38
Metadata
- Authors
- Luther, J. M., Law, M., Song, Q., Perkins, C. L., Beard, M. C., & Nozik, A. J.
- Venue
- ACS Nano
- Publisher
- American Chemical Society (ACS)
- Published
- 2008-01-31
- Volume
- 2
- Issue
- 2
- Pages
- 271-280
- ISSN
- 1936-0851 (ISSN-L)
- 1936-086X
- OpenAlex
- W2141457340
- Cited by
- 754
- References
- 0
- FWCI
- 23.58
- Type
- journal article
- Language
- en
- Open access
- closed
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- Luther, J. M., Law, M., Song, Q., Perkins, C. L., Beard, M. C., & Nozik, A. J. (2008). Structural, Optical, and Electrical Properties of Self-Assembled Films of PbSe Nanocrystals Treated with 1,2-Ethanedithiol. ACS Nano. https://doi.org/10.1021/nn7003348
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