02528nas a2200253   4500008004100000022001400041245011700055210006900172260000800241300001400249490000800263520162300271653002301894653004201917653003001959653001801989100002402007700002702031700001702058700001702075700003002092700002702122856012502149       2024                        eng d  a0031-865500aFar-red active unsymmetrical squaraine dyes containing N-arylated indoline donors for dye sensitized solar cells0 aFarred active unsymmetrical squaraine dyes containing Narylated   cJUL  a1116-11260 v1003 a<p>
	Squaraine dyes possess sharp far-red active transition with high extinction coefficient and form aggregates on TiO2 surface. Aggregation of dyes on TiO2 has been considered as a detrimental factor for DSSC device performance, which can be controlled by appending alkyl groups to the dye structures. Hence by integrating alkylated (alkyl groups with both in-plane and out-of-plane) aryl group with indoline moiety to make it compatible with other electrolytes and for controlling the dye-aggregation, a series of squaraine acceptor-based dyes SQA4-6 have been designed and synthesized. SQA4-6 dyes showed absorption between 642 and 653 nm (lambda max), photophysical and electrochemical studies indicated that the HOMO energy levels of this sets of dyes are well aligned with the potentials of I-/I3-\$\$ {\textbackslashmathrm{I}}_3&lt;\^&gt;{-} \$\$ and [Co(bpy)3]2+/3+ redox shuttles for better dye regeneration process. DSSC device efficiency of 3% has been achieved for SQA5 dye with iodolyte (I-/I3-\$\$ {\textbackslashmathrm{I}}_3&lt;\^&gt;{-} \$\$) electrolyte in the presence of 0.3 mM of chenodeoxycholic acid (CDCA). The IPCE profile of DSSC device fabricated with SQA4-6 dyes indicated the contribution of aggregated structures for the photocurrent generation. Dye-sensitized solar cell (DSSC) device efficiency of 3% (Jsc 5.72 mA cm-2, Voc 662 mV and ff 79%) has been achieved for an unsymmetrical squaraine dye, SQA5 with iodolyte electrolyte and the incident photon to current efficiency (IPCE) profile indicates the contribution of aggregated structures for the photocurrent generation.*image</p>
10aaggregation of dye10aarylation on N-atom of indoline donor10adye-sensitized solar cell10asquaraine dye1 aJadhav, Avinash, P.1 aSingh, Ambarish, Kumar1 aPandya, Rinu1 aVanka, Kumar1 aKrishnamoorthy, Kothandam1 aJayaraj, Nithyanandhan  uhttps://library.ncl.res.in/content/far-red-active-unsymmetrical-squaraine-dyes-containing-n-arylated-indoline-donors-dye