Pyridyl anchored indolium dyes for the p-type dye sensitized solar cell

Marri, Anil Reddy, Flint, Heather, Gibson, Elizabeth A. and Fielden, John (2022) Pyridyl anchored indolium dyes for the p-type dye sensitized solar cell. Dyes and Pigments, 202. ISSN 0143-7208

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Abstract

Three new thiophenyl bridged triarylamine-donor based dyes with pyridyl anchoring groups and indolium acceptors have been synthesized and studied as sensitizers for the p-type dye-sensitized solar cell (p-DSSC). Compared to known dicyano and pyridinium dyes with the same triarylamine cores, these new sensitizers have broadened and red-shifted UV–vis absorption spectra, with high extinction coefficients and absorption extending beyond 700 nm. TD-DFT calculations on the indolium family indicate that these dyes combine strong donor acceptor communication, with a high degree of charge separation in the excited state – an ideal combination for sensitizer dyes. The phenylpyridyl anchored bis-indolium gives the highest power conversion efficiency (0.097%) through a short circuit photocurrent (JSC) of 3.04 mA cm−2, open circuit voltage (VOC) of 97 mV and fill factor of 36%. This exceeds the performance of the P1 reference dye in this study, and represents the best performance so far for a cationic, pyridine anchored p-DSSC dye.

Item Type: Article
Additional Information: Acknowledgements: We thank the UK EPSRC National Mass Spectrometry Facility for MS. ARM thanks the EU for Marie Skłodowska Curie Fellowship No. 656658 “NanoCuI”, and JF the Royal Society for Research Grant RG140578. EAG thanks the EU for ERC starting grant p-TYPE 715354.
Faculty \ School: Faculty of Science > School of Chemistry
Depositing User: LivePure Connector
Date Deposited: 15 Mar 2022 16:30
Last Modified: 11 May 2022 11:31
URI: https://ueaeprints.uea.ac.uk/id/eprint/84060
DOI: 10.1016/j.dyepig.2022.110244

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