Emphasizing the operational role of a novel graphene-based ink into high performance ternary organic solar cellsEmphasizing the operational role of a novel graphene-based ink into high performance ternary organic solar cells Peer-Reviewed Journal Publication Δημοσίευση σε Περιοδικό με Κριτές 2021-09-282020enA novel solution-processed, graphene-based material was synthesized by treating graphene oxide (GO) with 2,5,7-trinitro-9-oxo-fluorenone-4-carboxylic acid (TNF-COOH) moieties, via simple synthetic routes. The yielded molecule N-[(carbamoyl-GO)ethyl]-N′-[(carbamoyl)-(2,5,7-trinitro-9-oxo-fluorene)] (GO-TNF) was thoroughly characterized and it was shown that it presents favorable highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) energy levels to function as a bridge component between the polymeric donor poly({4,8-bis[(2-ethylhexyl)oxy]benzo[1,2-b:4,5-b′]dithiophene-2,6-diyl}{3-fluoro-2-[(2-ethylhexyl)carbonyl] thieno[3,4-b]thiophenediyl}) (PTB7) and the fullerene derivative acceptor [6,6]-phenyl-C71-butyric-acid-methylester (PC71BM). In this context, a GO-TNF based ink was prepared and directly incorporated within the binary photoactive layer, in different volume ratios (1%–3% ratio to the blend) for the effective realization of inverted ternary organic solar cells (OSCs) of the structure ITO/PFN/PTB7:GO-TNF:PC71BM/MoO3/Al. The addition of 2% v/v GO-TNF ink led to a champion power conversion efficiency (PCE) of 8.71% that was enhanced by ~13% as compared to the reference cell.http://creativecommons.org/licenses/by/4.0/Nanomaterials101Stylianakis_et_al_Nanomaterials_10(1)_2020.pdfChania [Greece]Library of TUC2021-09-27application/pdf5.7 MBfree Stylianakis Minas Kosmidis Dimitris Anagnostou Katerina Polyzoidis Christos Krassas Miron Kenanakis George Viskadouros Georgios Βισκαδουρος Γεωργιος Kornilios Nikolaos Petridis Konstantinos Kymakis, Emmanuel MDPI Ternary organic solar cells Graphene ink Functionalization Air-processed Cascade effect Charge transfer