Fullerene-functionalized vinyl polymers and preparation process thereof

Fullerene-functionalized vinyl polymer having general formula (I): wherein: - x is a fractional number comprised between 0 and 0.89, preferably comprised between 0 and 0.6; - y is a fractional number comprised between 0.01 and 0.9, preferably comprised between 0.02 and 0.7; - z is a fractional number comprised between 0.1 and 0.99, preferably comprised between 0.05 and 0.8; provided that the sum of x + y + z is equal to 1; - p is an integer comprised between 10 and 10000, preferably comprised between 20 and 5000; - w is an integer comprised between 50 and 250, preferably comprised between 60 and 90, more preferably is 60, 70, 84; - n is an integer comprised between 1 and 12, preferably comprised between 2 and 6; - R represents a hydrogen atom; or is selected from C1-C20, preferably C1-C10, linear or branched, saturated or unsaturated, alkyl groups, optionally containing heteroatoms, optionally substituted aryl groups, optionally substituted heteroaryl groups, optionally substituted cycloalkyl groups, optionally substituted heterocyclic groups; preferably is hydrogen. Said fullerene-functionalized vinyl polymer having general formula (I) can advantageously be used as an electron acceptor compound in organic photovoltaic devices (or solar devices) such as, for example, binary, ternary, quaternary, organic photovoltaic cells (or solar cells) having simple or "tandem" architecture, organic photovoltaic modules (or solar modules), on a rigid support or on a flexible support. Furthermore, said fullerene-functionalized vinyl polymer having general formula (I) can advantageously be used in perovskite-based photovoltaic cells (or solar cells) in the electron transport layer (ETL). Furthermore, said fullerene-functionalized vinyl polymer having general formula (I) can advantageously be used in the production of organic thin-film transistors (OTFTs), or organic field effect transistors (OFETs).