title: Direct Synthesis of Highly Conductive tert-Butylthiol-Capped CuInS2 Nanocrystals.
abstract: tert-butylthiol (tBuSH) is used as the sulfur source, surface ligand and co-solvent in the synthesis of CuInS2 nanocrystals (NCs). The presented method gives direct access to short-ligand-capped NCs without post-synthetic ligand exchange. The obtained 5 nm CuInS2 NCs crystallize in the cubic sphalerite phase with space group F-43m and a lattice parameter a=5.65 Å. Their comparably large optical and electrochemical band gap of 2.6-2.7 eV is attributed to iodine incorporation into the crystal structure as reflected by the composition Cu1.04 In0.96 S1.84 I0.62 determined by EDX. Conductivity measurements on thin films of the tBuSH-capped NCs result in a value of 2.5(.) 10(-2)  S m(-1) , which represents an increase by a factor of 400 compared to established dodecanethiol-capped CuInS2 NCs.
authors.affiliation: Univ. Grenoble Alpes, INAC-SPrAM, 38054, Grenoble Cedex 9, France.|CEA, INAC-SPrAM, Laboratoire d'Electronique Moleculaire, Organique et Hybride, 17 rue des Martyrs, 38054, Grenoble Cedex 9, France.|CNRS, SPrAM, 38054, Grenoble Cedex 9, France.
authors.forename: Aurélie
authors.initials: A
authors.lastname: Lefrançois
authors.affiliation: Univ. Grenoble Alpes, INAC-SP2M, 38054, Grenoble Cedex 9, France.|CEA, INAC-SP2M, 38054, Grenoble Cedex 9, France.
authors.forename: Stéphanie
authors.initials: S
authors.lastname: Pouget
authors.affiliation: Univ. Grenoble Alpes, INAC-SPrAM, 38054, Grenoble Cedex 9, France.|CEA, INAC-SPrAM, Laboratoire d'Electronique Moleculaire, Organique et Hybride, 17 rue des Martyrs, 38054, Grenoble Cedex 9, France.|CNRS, SPrAM, 38054, Grenoble Cedex 9, France.
authors.forename: Louis
authors.initials: L
authors.lastname: Vaure
authors.affiliation: Univ. Grenoble Alpes, INAC-SP2M, 38054, Grenoble Cedex 9, France.|CEA, INAC-SP2M, 38054, Grenoble Cedex 9, France.
authors.forename: Miguel
authors.initials: M
authors.lastname: Lopez-Haro
authors.affiliation: Univ. Grenoble Alpes, INAC-SPrAM, 38054, Grenoble Cedex 9, France. peter.reiss@cea.fr.|CEA, INAC-SPrAM, Laboratoire d'Electronique Moleculaire, Organique et Hybride, 17 rue des Martyrs, 38054, Grenoble Cedex 9, France. peter.reiss@cea.fr.|CNRS, SPrAM, 38054, Grenoble Cedex 9, France. peter.reiss@cea.fr.
authors.forename: Peter
authors.initials: P
authors.lastname: Reiss
keywords: CuInS2; direct synthesis; nanocrystals; semiconductors; tert-butylthiol