Roux, F.Amtablian, S.Anton, M.Besnard, G.Bilhaut, L.Bommersbach, P.Braillon, J.Cayron, C.Disdier, A.Fournier, H.Garnier, J.Jannaud, A.Jouhannaud, J.Kaminski, A.Karst, N.Noël, S.Perraud, S.Poncelet, O.Raccurt, O.Rapisarda, D.Ricaud, A.Rouchon, D.Roumanie, M.Rouviere, E.Sicardy, O.Sonier, F.Tarasov, K.Tardif, F.Tomassini, M.Villanova, J.2014-11-142014-11-142014-11-14201310.1016/j.solmat.2013.03.029https://infoscience.epfl.ch/handle/20.500.14299/108818We developed a new industry-compatible ink-based process to produce efficient chalcopyrite CuIn1-xGaxSe2 thin-film solar cells. Metallic In and Ga nanoparticles were produced by purely physical methods, using a low-cost and non-explosive solvent. The solvent acts as a protection against oxidation and can be removed without leaving carbon contamination. We formulated inks that can be safely coated in air by doctor blading. The precursors were converted into a functional absorber after annealing under Se vapors in a primary vacuum. This simple two-step process led to chalcopyrite CuIn1-xGaxSe2 thin-films with strong mechanical adhesion, and power conversion efficiency higher than 7%. © 2013 Elsevier B.V. All rights reserved.CIGSCISDoctor bladingFormulationGalliumInkNon-vacuumSolar cellsVacuumtext::journal::journal article::research article