Journal
DYES AND PIGMENTS
Volume 202, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.dyepig.2022.110244
Keywords
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Funding
- EU [656658, 715354]
- Royal Society [RG140578]
- European Research Council (ERC) [715354] Funding Source: European Research Council (ERC)
- Marie Curie Actions (MSCA) [656658] Funding Source: Marie Curie Actions (MSCA)
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Three new thiophenyl bridged triarylamine-donor based dyes with pyridyl anchoring groups and indolium acceptors have been synthesized and studied. Phenylpyridyl anchored bis-indolium showed the best performance.
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 (J(SC)) of 3.04 mA cm(-2), open circuit voltage (V-OC) 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.
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