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Synthesis of SOT-OH and its application as a building block for the synthesis of new dimeric and trimeric Spiro-OMeTAD materials
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Namrata Pant ,
Alexander H. Harkiss ,
Frances M. Tracey ,
Joseph Cameron ,
Peter J. Skabara ,
Peter Holliman ,
Pablo Docampo ,
Graeme Cooke
Molecular Systems Design & Engineering, Volume: 7, Issue: 8, Pages: 899 - 905
Swansea University Author:
Peter Holliman
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DOI (Published version): 10.1039/d2me00038e
Abstract
Spiro-OMeTAD has become a ubiquitous hole-transporting material (HTM) in perovskite-based solar cells. However, it has several intrinsic drawbacks including its long-term stability, low conductivity and hole-mobility. Hence, the synthesis of new derivatives with improved charge transporting properti...
| Published in: | Molecular Systems Design & Engineering |
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| ISSN: | 2058-9689 |
| Published: |
Royal Society of Chemistry (RSC)
2023
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| Online Access: |
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa65194 |
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| Abstract: |
Spiro-OMeTAD has become a ubiquitous hole-transporting material (HTM) in perovskite-based solar cells. However, it has several intrinsic drawbacks including its long-term stability, low conductivity and hole-mobility. Hence, the synthesis of new derivatives with improved charge transporting properties remains an important goal. Here, we have devised a novel synthetic route to prepare unsymmetrically functionalised Spiro-OMeTAD derivatives. We report the synthesis of a mono-demethylated Spiro-OMeTAD derivative, SOT-OH, utilising two different synthetic protocols and show two new derivatives, a dimer (SOT-D) and a trimer (SOT-T) as exemplars. We fully characterise the developed materials and show significantly higher conductivity values than Spiro-OMeTAD when doped with standard ionic salts at the same concentrations. The solar cells fabricated using the mixed composition Cs0.05(FA0.85MA0.15)0.95PbI3 perovskite and the novel SOT-D show power conversion efficiencies of up to 16.4% under standard AM1.5 illumination compared to 16.1% observed when using the benchmark Spiro-OMeTAD. |
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| Keywords: |
Solar cells |
| College: |
Faculty of Science and Engineering |
| Issue: |
8 |
| Start Page: |
899 |
| End Page: |
905 |