title: Alternative synthesis of CuFeSe2 nanocrystals with magnetic and photoelectric properties.
abstract: Monodisperse CuFeSe2 nanocrystals of high quality have been successfully synthesized for the first time using a hot-solution injection method from the reaction of metallic acetylacetonates with diphenyl diselenide (Ph2Se2) in oleylamine with addition of oleic acid at 255 °C for 90 min. The characterizations of X-ray diffraction, electron microscopy, and compositional analysis reveal that the resulting CuFeSe2 nanocrystals are of tetragonal phase with a stoichiometric composition. The CuFeSe2 nanocrystals exhibit well-defined quasi-cubic shape with an average size of ∼18 nm, and their shape can be tuned from quasi-cubes to quasi-spheres by adjusting the reaction parameters. Magnetic measurement reveals that the as-synthesized CuFeSe2 nanocrystals are ferromagnetic and paramagnetic at 4 and 300 K, respectively. Additionally, the current-voltage (I-V) behavior of the CuFeSe2 nanocrystals suggests that they are promising candidates for application in optoelectronics and solar energy conversion.
authors.affiliation: Hefei National Laboratory of Physical Sciences at the Microscale, ‡Department of Chemistry, §Laboratory of Nanomaterials for Energy Conversion, and ∥Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China (USTC) , Hefei 230026, Anhui, P. R. China.
authors.forename: Wenliang
authors.initials: W
authors.lastname: Wang
authors.forename: Jun
authors.initials: J
authors.lastname: Jiang
authors.forename: Tao
authors.initials: T
authors.lastname: Ding
authors.forename: Chunde
authors.initials: C
authors.lastname: Wang
authors.forename: Jian
authors.initials: J
authors.lastname: Zuo
authors.forename: Qing
authors.initials: Q
authors.lastname: Yang
keywords: eskebornite; magnetic property; monodisperse CuFeSe2 nanocrystal; narrow bandgap semiconductor; optoelectronic property; organometallic synthesis; photodetector; ternary selenide