Please use this identifier to cite or link to this item: http://idr.nitk.ac.in/jspui/handle/123456789/16622
Title: Simple thiophene-bridged D-π-A type chromophores for DSSCs: a comprehensive study of their sensitization and co-sensitization properties
Authors: Keremane K.S.
Abdellah I.M.
Naik P.
El-Shafei A.
Adhikari A.V.
Issue Date: 2020
Citation: Physical Chemistry Chemical Physics Vol. 22 , 40 , p. 23169 - 23184
Abstract: Herein, we report the design and synthesis of four new thiophene-bridged D-π-A configured organic dyes T1-4 comprising different donors, π-spacers and anchoring units, as potential sensitizers and co-sensitizers for DSSCs. The current work also highlights their structural, photophysical, thermal, electrochemical, theoretical, and photoelectrochemical studies, including evaluation of their structure-property relationships. The optical results revealed that the dyes T1-4 display λabs and λemi in the range of 402-461 nm and 556-575 nm, respectively, with a bandgap in the order of 2.31-2.58 eV. Furthermore, the results showed that the dyes possess all the pre-requisites to act as sensitizers/co-sensitizers. Among the tested dyes, the device based on sensitizer T2 achieved the highest PCE compared to the other three dyes, under the standard conditions. Furthermore, their co-sensitized devices were fabricated by co-adsorbing them with the well-known Ru-based MH-12 sensitizer and interestingly the co-sensitizer T3 carrying an alkoxy group and a barbituric acid anchor displayed the highest PCE of 8.79%, which is much higher than that of MH-12 alone (8.18%). Conclusively, the study furnishes a deeper understanding of the intricacies involved in the structural modification of sensitizers/co-sensitizers in achieving an enhanced performance of the devices. This journal is © 2020 the Owner Societies.
URI: https://doi.org/10.1039/d0cp02781b
http://idr.nitk.ac.in/jspui/handle/123456789/16622
Appears in Collections:1. Journal Articles

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