A Multifaceted Ferrocene Interlayer for Highly Stable and Efficient Lithium Doped Spiro‐OMeTAD‐based Perovskite Solar Cells
Journal article
Webb, T., Liu, X., Westbrook, R.J.E., Kern, S., Sajjad, M.T., Jenatsch, S., Jayawardena, K. D. G. Imalka, Perera, W. H.K., Marko, I.P., Sathasivam, S., Li, B., Yavari, M., Scurr, D.J., Alexander, M.R., Macdonald, T.J., Haque, S.A., Sweeney, S.J. and Zhang, W. (2022). A Multifaceted Ferrocene Interlayer for Highly Stable and Efficient Lithium Doped Spiro‐OMeTAD‐based Perovskite Solar Cells. Advanced Energy Materials. https://doi.org/10.1002/aenm.202200666
| Authors | Webb, T., Liu, X., Westbrook, R.J.E., Kern, S., Sajjad, M.T., Jenatsch, S., Jayawardena, K. D. G. Imalka, Perera, W. H.K., Marko, I.P., Sathasivam, S., Li, B., Yavari, M., Scurr, D.J., Alexander, M.R., Macdonald, T.J., Haque, S.A., Sweeney, S.J. and Zhang, W. |
|---|---|
| Abstract | Over the last decade, 2,2″,7,7″-Tetrakis[N,N-di(4-methoxyphenyl)amino]-9,9′-spirobifluorene (spiro-OMeTAD) has remained the hole transporting layer (HTL) of choice for producing high efficiency perovskite solar cells (PSCs). However, PSCs incorporating spiro-OMeTAD suffer significantly from dopant induced instability and non-ideal band alignments. Herein, a new approach is presented for tackling these issues using the functionality of organometallocenes to bind to Li+ dopant ions, rendering them immobile and reducing their impact on the degradation of PSCs. Consequently, significant improvements are observed in device stability under elevated temperature and humidity, conditions in which ion migration occurs most readily. Remarkably, PSCs prepared with ferrocene retain 70% of the initial power conversion efficiency (PCE) after a period of 1250 h as compared to only 8% in the control. Synergistically, it is also identified that ferrocene improves the hole extraction yield at the HTL interface and reduces interfacial recombination enabling PCEs to reach 23.45%. This work offers a pathway for producing highly efficient spiro-OMeTAD devices with conventional dopants via addressing the key challenge of dopant induced instability in leading PSCs. |
| Keywords | General Materials Science; Renewable Energy, Sustainability and the Environment |
| Year | 2022 |
| Journal | Advanced Energy Materials |
| Publisher | Wiley |
| ISSN | 1614-6832 |
| 1614-6840 | |
| Digital Object Identifier (DOI) | https://doi.org/10.1002/aenm.202200666 |
| Funder/Client | University of Surrey |
| Zhengzhou University | |
| University of Surrey | |
| Engineering and Physical Sciences Research Council | |
| Engineering and Physical Sciences Research Council | |
| Engineering and Physical Sciences Research Council | |
| Publication dates | |
| Online | 20 May 2022 |
| Publication process dates | |
| Accepted | 07 Apr 2022 |
| Deposited | 23 Jun 2022 |
| Publisher's version | License File Access Level Open |
| Accepted author manuscript | File Access Level Controlled |
| Supplemental file | License File Access Level Open |
| License | http://creativecommons.org/licenses/by/4.0/ |
| Page range | 2200666 |
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| Advanced Energy Materials - 2022 - Webb - A Multifaceted Ferrocene Interlayer for Highly Stable and Efficient Lithium Doped.pdf | ||
| License: CC BY 4.0 | ||
| File access level: Open | ||
Supplemental file
| Ferrocne SI.pdf | ||
| License: CC BY 4.0 | ||
| File access level: Open | ||
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