Enhanced DSSC performance by the introduction of hydroxamic acid group into the cyanoacetic acid dyes

• Published in: Journal of photochemistry and photobiology. A, Chemistry. Vol. 398; p. 112512
• Main Authors: Thogiti, Suresh, Vuppala, Srimai, Cha, Ha Lim, Thuong Thuong, Nguyen Thi, Jo, Hyun Jun, Chitumalla, Ramesh Kumar, Hee, Son Chang, Thanh Thuy, Chau Thi, Jang, Joonkyung, Jung, Jae Hak, Koyyada, Ganesh, Kim, Jae Hong
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.07.2020
• Subjects: Anchor group; DFT/TDDFT; Dye-sensitized solar cells; Organic sensitizer; Organic sensitizer; Dye-sensitized solar cells; DFT/TDDFT; Anchor group
• ISSN: 1010-6030; 1873-2666
• DOI: 10.1016/j.jphotochem.2020.112512

[Display omitted] •Two hydroxamte anchoring sensitizers (BTPA-HA and PTZ-HA) have been synthesized by modifying the cyanoacetic acid dyes (BTPA-CA and PTZ-CA) by peptide bond formation (condensation reaction) and systematically compared their DSSC performances.•The synthesised BTPA-HA and PTZ-HA sensitizers have shown redshifted absorption spectra and end enhanced IPCE than their corresponding cyanoacetic acid dyes.•The synthesized hydroxamic acid dyes, PTZ-HA and BTPA-HA have shown enhanced efficiency of 4.06 and 6.22 % when compared to cyanaoacetic acid dyes, PTZ-CA and BTPA-CA showing 2.99 and 5.65 % efficiencies, respectively.•The detailed optical, electrochemical and photovoltaic properties were analyzed and complimented with the density functional theory (DFT) studies. Two hydroxamic acid anchoring based dyes, PTZ-HA and BTPA-HA were designed, synthesized and their DSSC performances were compared with that of the corresponding cyanoacetic acid anchoring group dyes (PTZ-CA and BTPA-CA) for better understanding of their enhanced DSSC performance. The hydroxamic anchored dyes, PTZ-HA and BTPA-HA have shown enhanced efficiency of 4.06 and 6.22 % when compared to cyanaoacetic acid dyes, PTZ-CA and BTPA-CA showing 2.99 and 5.65 % efficiencies, respectively. This particular enhancement in the efficiencies could be attributed to the stable bidentate keto anchoring mode of the hydroxamic acid group, which led to the efficient electron injection. The detailed optical, electrochemical and photovoltaic properties were analyzed and complimented with the density functional theory (DFT) studies.