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AuthorAshraf S.
AuthorSu R.
AuthorAkhtar J.
AuthorSiddiqi H.M.
AuthorShuja A.
AuthorAl-Saad K.A.
AuthorAl-Qaradawi S.Y.
AuthorEl-Shafei A.
Available date2020-04-01T06:59:41Z
Publication Date2019
Publication NameDyes and Pigments
ResourceScopus
ISSN1437208
URIhttp://dx.doi.org/10.1016/j.dyepig.2019.107754
URIhttp://hdl.handle.net/10576/13660
AbstractStructure-property relationships of four novel bipyridyl Ru(II) complexes, denoted as SD-22, SD-24, SD-26 and SD-28, are reported herein. The molecular structures of all four photosensitizers were confirmed using FT-IR, 1H NMR and mass spectrometry. Photovoltaic characteristics of the photosensitizers were evaluated under 1.5 a.m. standard illumination condition, in presence of deoxycholic acid as co-adsorbent, and subsequently compared to the performance of the benchmark, Z907. SD-22 showed an IPCE of 52% and 50% at 440 nm and 550 nm, respectively, a short-circuit photocurrent density (JSC) of 17.37 mA cm−2, open-circuit photovoltage (VOC) of 0.63 V and fill factor (FF) of 0.66, producing an overall conversion efficiency (η) of 7.31%, which outperformed Z907 (7.02%) under the same experimental device conditions. The η of the other photosensitizers is in the following order: SD-22 > SD-28 > SD-26 > SD-24. Photosensitizer SD-22 has N,N′-dialkyl group attached to a benzene ring while SD-24 has N,N′-dialkyl without a benzene ring. The extended conjugation in SD-22 translated into higher overall solar-to-electric conversion efficiency. Substitution of dialkylamino-based ancillary ligands of Ru(II) dyes SD-26 and SD-28 with –OCH3 and –OC6H13 also demonstrated that the photovoltaic performance of polypyridyl ruthenium photosensitizers is a function of the donating power of ancillary ligands as well as the steric effect of alkoxy auxochromes at –ortho position.
SponsorThe authors would like to thank the Higher Education Commission, Pakistan , Pakistan for financial assistance of this project. Facilities in CIRBS and CAEPE at International Islamic University, Islamabad, Pakistan, HEC 's support in the form of SRGR grant# 2505 (21-2505/SRGP/R&D/HEC/2019 ) and NRPU grant# 8227 are also acknowledged. Appendix A
Languageen
PublisherElsevier Ltd
SubjectAncillary ligands
Ruthenium dyes
Solar cell
Structure-property relationship
TitleInvestigations into structure-property relationships of novel Ru(II) dyes with N,N′-Diethyl group in ancillary ligand for dye-sensitized solar cells
TypeArticle
Volume Number171
dc.accessType Abstract Only


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