Impact of π Spacers on the Optical, Electrochemical and Photovoltaic performance of D‐(π‐A)2 Based Sensitizers. Issue 19 (16th May 2018)

• Record Type: Journal Article
• Authors: Sivanadanam, Jagadeeswari; Ganesan, Paramaguru; Gao, Peng; Nazeeruddin, Mohammad K.; Rajalingam, Renganathan‐
• Is Part Of: ChemistrySelect. Volume 3:Issue 19(2018)
• Page Start: 5269
• Page End: 5276
• Publication Date: 2018-05-16
• Subjects: Multianchoring -- π spacers -- DSSC -- Intramolecular charge transfer -- IPCE; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/slct.201800977
• Languages: English
• ISSNs: 2365-6549

Abstract

Abstract: A series of D‐(π‐A)2 organic dyes with different π spacers have been designed and synthesized. The modification of the bi‐anchoring dyes regarding π spacers assists in tuning the photochemical and electrochemical properties of the dyes, which determine the open circuit voltage ( VOC ), short circuit current density ( JSC ) and hence overall power conversion efficiency. It is found that varying the spacers has more influence on determining the short circuit current density of the solar cell devices made with these sensitizers. When thiophene is used as π spacer, higher short circuit current density of 9.42 mA/cm 2 is observed. The better IPCE of the dye with thiophene as spacer further supports its advantage over other spacers. The observed tunable light harvesting property, electrochemical and photovoltaic behaviour by varying the π spacers in D‐(π‐A)2 type sensitizers will provide fruitful information for future designing of sensitizers with multi‐anchoring modes. Abstract : We designed and synthesized bianchoring dyes based on the D‐(π‐A)2 molecular framework and studied the structure –performance relationship. Effect of π spacers play an important role in determining the optoelectronic properties. This work will provide vital information to achieve higher efficiencies with multianchoring dyes.