doi:10.1016/j.dyepig.2022.110310engDuerto, I.Sarasa, S.Barrios, D.Orduna, J.Villacampa, B.Blesa, M. -JEnhancing the temporal stability of DSSCs with novel vinylpyrimidine anchoring and accepting groupART-2022-128723Three compounds based on aniline, thiophene and vinylpyrimidine as anchoring group have been prepared and studied as light harvesting units for dye-sensitized solar cells (DSSCs). They comprise thiophenyl p-spacer systems with one or two thiophenes (AT-Pyri, ATT-Pyri) and aniline as donor which is functionalized, in one case, with an hydroxyl group (HO-AT-Pyri). The bithiophene based dye (ATT-Pyri) shows higher extinction coefficients and smaller transition energy, as well as broader absorption spectrum. Thus, despite lower dye uptake, devices based on one thiophene and with the hydroxyl group (HO-AT-Pyri) have slightly higher power conversion efficiencies (¿) as compared with the analogous dye without this group (AT-Pyri). However, the best performing device is based on the dye with bithiophene bridge (ATT-Pyri) when a co-adsorbent is added to avoid the aggregation of the dye. The photovoltaic parameters of cells based on these vinylpyrimidine dyes are enhanced over 1000 h, especially for ATT-Pyri devices, which reach a ¿ = 6, 4%. © 2022 The Authors2022http://zaguan.unizar.es/record/13080810.1016/j.dyepig.2022.110310http://zaguan.unizar.es/record/130808oai:zaguan.unizar.es:130808info:eu-repo/grantAgreement/ES/DGA/E47-20Rinfo:eu-repo/grantAgreement/ES/MICINN/PID2019-104307GB-I00-AEI-10.13039-501100011033Dyes and Pigments 203, 110310 (2022), -by-nc-ndhttp://creativecommons.org/licenses/by-nc-nd/3.0/es/info:eu-repo/semantics/openAccess