Abstract
By intelligently utilizing the odd-even effect existing in the melting points of alkanes as presented in the basic textbook of Organic Chemistry, different alkoxy groups were introduced to modify the structure of commercial Spiro-OMeTAD to give new Spiro derivatives of Spiro-OEtTAD, Spiro-OPrTAD, Spiro-OiPrTAD and Spiro-OBuTAD, with the aim to adjust the molecular packing status in perovskite solar cells as hole transporting compounds. Excitedly, with the introduction of ethoxy groups instead of the methoxy ones in Spiro-OMeTAD, Spiro-OEtTAD-based perovskite solar cells demonstrated the highest device performance of 20.16%, higher than that of Spiro-OMeTAD (18.64%).
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Acknowledgements
This work was supported by the National Natural Science Foundation of China (21734007, 51573140, 51673151, 21773045), the Natural Science Foundation of Hubei Province (2017CFA002), and the Fundamental Research Funds for the Central Universities (2042017kf0247, 2042018kf0014).
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Similar or Different: the same Spiro-core but different alkyl chains with apparently improved device performance of Perovskite Solar Cells
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Liu, F., Bi, S., Wang, X. et al. Similar or different: the same Spiro-core but different alkyl chains with apparently improved device performance of perovskite solar cells. Sci. China Chem. 62, 739–745 (2019). https://doi.org/10.1007/s11426-018-9432-x
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DOI: https://doi.org/10.1007/s11426-018-9432-x
Keywords
- perovskite solar cells
- alkyl chains
- molecular packing