Kim, Sung Wook Lee, Jaejun Sung, Ji Ho Seo, Dong-jae Kim, Ilsoo Jo, Moon-Ho Kwon, Byoung Wook Choi, Won Kook Choi, Heon-Jin 2024-01-20T09:31:44Z 2024-01-20T09:31:44Z 2021-09-05 2014-07 1936-0851 https://pubs.kist.re.kr/handle/201004/126626 Since the discovery of graphene, growth of two-dimensional (2D) nanomaterials has greatly attracted attention. However, spontaneous growth of atomic two-dimensional (2D) materials is limitedly permitted for several layered-structure crystals, such as graphene, MoS2, and h-BN, and otherwise it is notoriously difficult. Here we report the gas-phase 2D growth of silicon (Si), that is cubic in symmetry, via dendritic growth and an interdendritic filling mechanism and to form Si nanosheets (SiNSs) of 1 to 13 nm in thickness. Thin SiNSs show strong thickness-dependent photoluminescence in visible range including red, green, and blue (RGB) emissions with the associated band gap energies ranging from 1.6 to 3.2 eV; these emission energies were greater than those from Si quantum dots (SiQDs) of the similar sizes. We also demonstrated that electrically driven white, as well as blue, emission in a conventional organic light-emitting diode (OLED) geometry with the SiNS assembly as the active emitting layers. Tunable light emissions in visible range in our observations suggest practical implications for novel 2D Si nanophotonics. English AMER CHEMICAL SOC MOS2 ATOMIC LAYERS QUANTUM DOTS HYDROGEN DESORPTION MECHANISM Two-Dimensionally Grown Single-Crystal Silicon Nanosheets with Tunable Visible-Light Emissions Article 10.1021/nn501683f 1 ACS NANO, v.8, no.7, pp.6556 - 6562 ACS NANO 8 7 6556 6562 scie scopus 000339463100008 2-s2.0-84904717690 Chemistry, Multidisciplinary Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Chemistry Science & Technology - Other Topics Materials Science Article MOS2 ATOMIC LAYERS QUANTUM DOTS HYDROGEN DESORPTION MECHANISM Si nanosheets 2D growth thickness-dependent photoluminescence tunable emission