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Impact of π Spacers on the Optical, Electrochemical and Photovoltaic performance of D‐(π‐A) 2 Based Sensitizers
Author(s) -
Sivanadanam Jagadeeswari,
Ganesan Paramaguru,
Gao Peng,
Nazeeruddin Mohammad K.,
Rajalingam Renganathan
Publication year - 2018
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201800977
Subject(s) - thiophene , materials science , photovoltaic system , short circuit , electrochemistry , energy conversion efficiency , open circuit voltage , current density , optoelectronics , anchoring , dye sensitized solar cell , solar cell , voltage , photochemistry , electrode , chemistry , electrical engineering , organic chemistry , physics , quantum mechanics , structural engineering , electrolyte , engineering
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 ( V OC ), short circuit current density ( J SC ) 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.