title: Low-temperature direct conversion of Cu-In films to CuInSe₂ via selenization reaction in supercritical fluid.
abstract: In this study, we achieve the direct conversion of metallic Cu-In films to compound semiconductor CuInSe(2) films, at quite low temperature around 300 °C using less hazardous metalorganic selenium source in supercritical fluid (SCF). We investigated the effects of temperature and fluid (ethanol) density, and found that supercritical ethanol plays a crucial role in this low-temperature selenization reaction. Such SCF-assisted direct conversion reactions can facilitate large-scale, low-temperature, and rapid synthesis of CuInSe(2) films, which can potentially lead to the low-cost production of solar cells.
authors.affiliation: Institute of Multidiciplinary Research for Advanced Materials, Tohoku University, Sendai, Miyagi 980-8577, Japan.
authors.forename: Takaaki
authors.initials: T
authors.lastname: Tomai
authors.forename: Dinesh
authors.initials: D
authors.lastname: Rangappa
authors.forename: Itaru
authors.initials: I
authors.lastname: Honma
mesh_terms: D025924:Chromatography, Supercritical Fluid; D003300:Copper / Q000737:chemistry*; D000431:Ethanol / Q000737:chemistry; D007204:Indium / Q000737:chemistry*; D012643:Selenium / Q000737:chemistry*; D012666:Semiconductors; D012993:Solar Energy; D013696:Temperature; D014961:X-Ray Diffraction
chemical_list: C101793:copper indium diselenide; D007204:Indium; D000431:Ethanol; D003300:Copper; D012643:Selenium