Liquid–solid spinodal decomposition mediated synthesis of Sb2Se3 nanowires and their photoelectric behavior
作者： Yong Hun Kwon , Myoungho Jeong , Hyun Woo Do , Jeong Yong Lee , Hyung Koun Cho
DOI: 10.1039/C5NR03461B
关键词: Nanowire 、 Spinodal decomposition 、 Phase diagram 、 Annealing (metallurgy) 、 Chalcogenide 、 Vapor pressure 、 Photocurrent 、 Optoelectronics 、 Nanotechnology 、 Materials science 、 Single crystal
摘要: The convenient synthesis of one-dimensional nanostructures chalcogenide compounds with a visible band-gap is an essential research topic in developing next-generation photoelectronic devices. In particular, the design theoretically predictable process provides great flexibility and has considerable ripple effect nanotechnology. this study, novel rational growth approach designed using spinodal decomposition phenomenon for Sb2Se3 nanowires, which based on thermodynamic phase diagram. Using stacked elemental layer (Sb/Sb–Se/Se) heat treatment at 623 K 30 min under N2 atmosphere, vertically inclined are experimentally demonstrated. An additional annealing 523 vacuum effectively removed excess Se elements due to their high vapor pressure, resulting highly dense single crystal nanowire arrays. Adaption our enables significantly improved photocurrent generation structure (glass/ITO/Sb2Se3 nanowires/ITO/PEN) from 6.4 (dark) 690 μA (at 3 V AM 1.5G). addition, photoelectrochemical test demonstrated p-type conductivity robust photocorrosion performance 0.5 M H2SO4.
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