Journal
JOURNAL OF SAUDI CHEMICAL SOCIETY
Volume 27, Issue 3, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jscs.2023.101643
Keywords
Azo thiazole organic dyes; Co-sensitization; Chemical synthesis; Dye-sensitized solar cells; Photoconversion efficiency
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Three novel azo thiazole organic dyes, NA-1-3, were synthesized and used as co-sensitizers in dye-sensitized solar cells (DSSCs). The co-sensitized DSSCs showed improved photovoltaic performance compared to N719, with enhanced short-circuit and open-circuit photocurrents (Jsc) and voltages (Voc). The improvements were attributed to the effective reduction of electron recombination through co-sensitization.
Three novel azo thiazole organic dyes, NA-1-3, have been synthesized and utilized as co -sensitizers in dye-sensitized solar cells (DSSCs). These co-sensitizers were designed with a thiazole ring p-bridge that mediates between the diazo (-N = N-) functional group and carboxylic acid anchoring unit. They possess a rod-like molecular structure and exhibit strong UV-vis absorption near 600 nm. Co-sensitization studies were also conducted with the ruthenium complex N719. The co-sensitized DSSCs showed enhanced short-circuit and open-circuit photocurrents (Jsc) and volt-ages (Voc), resulting in more efficient photovoltaic performance compared to N719 (PCE 7.25%). Electrochemical impedance spectroscopy (EIS) and incident photon to current efficiency (IPCE) were employed to investigate the underlying reasons for these improvements. It was found that co-sensitization effectively reduced electron recombination, resulting in a higher Voc without com-promising photocurrent loss.(c) 2023 The Author(s). Published by Elsevier B.V. on behalf of King Saud University. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
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