doi:10.1016/j.dyepig.2020.108357engTejeda-Orusco, V.Blais, M.Cabanetos, C.Blanchard, P.Andreu, R.Franco, S.Orduna, J.Diosdado, B.E.4H-pyranylidene-based small push-pull chromophores: Synthesis, structure, electronic properties and photovoltaic evaluationART-2020-117146The synthesis and electrochemical and optical characterizations of four new 4H-pyranylidene-based push-pull molecules are reported herein as well as their evaluation as donor materials for organic photovoltaics. Studied systems exhibit good absorption properties and appropriate LUMO levels for a photoinduced electron transfer to C60. Bilayer organic solar cells fabricated from these new donors and C60 as the acceptor gave photocurrent however with low power conversion efficiencies. As shown by X-ray diffraction and theoretical calculations, titled molecules present a twisted structure which may prevent the formation of suitable p-p contacts between adjacent molecules hence explaining their low photovoltaic performance.2020http://zaguan.unizar.es/record/11163510.1016/j.dyepig.2020.108357http://zaguan.unizar.es/record/111635oai:zaguan.unizar.es:111635info:eu-repo/grantAgreement/ES/DGA/E14-17Rinfo:eu-repo/grantAgreement/ES/MINECO/CTQ2014-52331-Rinfo:eu-repo/grantAgreement/ES/UZ/UZ2019-CIE-01Dyes and Pigments 178 (2020), 108357 1-9by-nc-ndhttp://creativecommons.org/licenses/by-nc-nd/3.0/es/info:eu-repo/semantics/openAccess