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Enhancing the Hole-Conductivity of Spiro-OMeTAD without Oxygen or Lithium Salts by Using Spiro(TFSI)2 in Perovskite and Dye-Sensitized Solar Cells
Abstract
2,2',7,7'-Tetrakis(N,N-di-p-methoxyphenylamine)-9,9'-spirobifluorene (spiro-OMeTAD), the prevalent organic hole transport material used in solid-state dye-sensitized solar cells and perovskite-absorber solar cells, relies on an uncontrolled oxidative process to reach appreciable conductivity. This work presents the use of a dicationic salt of spiro-OMeTAD, named spiro(TFSI)2, as a facile means of controllably increasing the conductivity of spiro-OMeTAD up to 10(-3) S cm(-1) without relying on oxidation in air. Spiro(TFSI)2 enables the first demonstration of solid-state dye-sensitized solar cells fabricated and operated with the complete exclusion of oxygen after deposition of the sensitizer with higher and more reproducible device performance. Perovskite-absorber solar cells fabricated with spiro(TFSI)2 show improved operating stability in an inert atmosphere. Gaining control of the conductivity of the HTM in both dye-sensitized and perovskite-absorber solar cells in an inert atmosphere using spiro(TFSI)2 is an important step toward the commercialization of these technologies.
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Cited by
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Leijtens, T., Eperon, G. E., Noel, N. K., Habisreutinger, S. N., Petrozza, A., & Snaith, H. J. (2015) · Advanced Energy Materials · doi:10.1002/aenm.201500963 · Cited by 1,308
Monolithic perovskite/silicon-heterojunction tandem solar cells processed at low temperature
Albrecht, S., Saliba, M., Correa Baena, J. P., Lang, F., Kegelmann, L., Mews, M., Steier, L., Abate, A., Rappich, J., Korte, L., et al. (2016) · Energy & Environmental Science · doi:10.1039/c5ee02965a · Cited by 649
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Eperon, G. E., Habisreutinger, S. N., Leijtens, T., Bruijnaers, B. J., van Franeker, J. J., deQuilettes, D. W., Pathak, S., Sutton, R. J., Grancini, G., Ginger, D. S., et al. (2015) · ACS Nano · doi:10.1021/acsnano.5b03626 · Cited by 574
Dye-sensitized solar cells strike back
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Metadata
- Authors
- Nguyen, W. H., Bailie, C. D., Unger, E. L., & McGehee, M. D.
- Venue
- Journal of the American Chemical Society
- Publisher
- American Chemical Society (ACS)
- Published
- 2014-07-29
- Volume
- 136
- Issue
- 31
- Pages
- 10996-11001
- ISSN
- 0002-7863 (ISSN-L)
- 1520-5126
- OpenAlex
- W2171118682
- Cited by
- 611
- References
- 0
- FWCI
- 22.49
- Type
- journal article
- Language
- en
- Open access
- closed
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- CoChat. (2026). Citation check: Enhancing the Hole-Conductivity of Spiro-OMeTAD without Oxygen or Lithium Salts by Using Spiro(TFSI)2 in Perovskite and Dye-Sensitized Solar Cells. https://app.cochat.ai/papers/10.1021/ja504539w
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- Nguyen, W. H., Bailie, C. D., Unger, E. L., & McGehee, M. D. (2014). Enhancing the Hole-Conductivity of Spiro-OMeTAD without Oxygen or Lithium Salts by Using Spiro(TFSI)2 in Perovskite and Dye-Sensitized Solar Cells. Journal of the American Chemical Society. https://doi.org/10.1021/ja504539w
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