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Title: | Investigation of new carbazole based metal-free dyes as active photo-sensitizers/co-sensitizers for DSSCs |
Authors: | Naik, P. Su, R. Elmorsy, M.R. El-Shafei, A. Adhikari, A.V. |
Issue Date: | 2018 |
Citation: | Dyes and Pigments, 2018, Vol.149, , pp.177-187 |
Abstract: | Herein, we report the molecular design, synthesis and characterization of three new D-D-?-A configured metal-free chromophores D1-3 for their application in DSSCs as sensitizers as well as co-sensitizers. The new entities comprise carbazole as donor scaffold, 4-methoxyphenyl group as auxiliary donor and three different units, viz. cyanoacetic acid, 2, 4-thiazolidinedione and barbituric acid as acceptor/anchoring groups. Their photochemical, electrochemical and theoretical studies were carried out in order to assess their feasibility as active sensitizers. Further, D1-3 were exploited as co-sensitizers along with NCSU-10 dye. Their photoelectrochemical performances and charge transport properties in fabricated DSSCs were studied. The results revealed that D1 sensitizer displayed the highest PCE of 2.20% among the three dyes. D3 when co-sensitized with NCSU-10 displayed an improved PCE of 8.32% (JSC = 19.25 mA.cm?2, VOC = 0.680 V, FF = 63.7%) while NCSU-10 alone exhibited PCE of 8.25% (JSC = 20.41 mA.cm?2, VOC = 0.667 V, FF = 60.6%). 2017 Elsevier Ltd |
URI: | http://idr.nitk.ac.in/jspui/handle/123456789/11772 |
Appears in Collections: | 1. Journal Articles |
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