The energy spectra of the ground state for an exciton (X) trapped by a neutral acceptor (A<SUP>0</SUP>) in a quantum dot with a parabolic confinement have been calculated as a function of the electron-to-h...The energy spectra of the ground state for an exciton (X) trapped by a neutral acceptor (A<SUP>0</SUP>) in a quantum dot with a parabolic confinement have been calculated as a function of the electron-to-hole mass ratio σ by using the hyperspherical coordinates. We find that the (A<SUP>0</SUP>,X) complex confined in a quantum dot has in general a larger binding energy than those in a two-dimensional quantum well and a three-dimensional bulk semiconductor, and the binding energy decreases with the increase of the electron-to-hole mass ratio.展开更多
The Su-Schrieffer-Heeger Hamiltonian and the Hubbard Hamiltonian within the unrestricted Hartree-Fock scheme have been used to study the effects of e-e interaction on lattice distortions and electronic structures of C...The Su-Schrieffer-Heeger Hamiltonian and the Hubbard Hamiltonian within the unrestricted Hartree-Fock scheme have been used to study the effects of e-e interaction on lattice distortions and electronic structures of C-60, C2-60, C+60, C2+60, When the interaction parameter increases from 0 to 3 eV, the bond variables of the C60 molecules are altered slightly, but the polaron energy levels and the charge density distributions of the C60 molecules are modified seriously.展开更多
We demonstrate the fabrication of BiOCl/Bi_2S_3 which is well defined at a large scale. The BiOCl/Bi_2S_3 heterostructures exhibit an enhanced photo-catalytic degradation of methyl orange（MO） compared to BiOCl and B...We demonstrate the fabrication of BiOCl/Bi_2S_3 which is well defined at a large scale. The BiOCl/Bi_2S_3 heterostructures exhibit an enhanced photo-catalytic degradation of methyl orange（MO） compared to BiOCl and Bi_2S_3, attributed to the interface between Bi_2S_3 and BiOCl, which effectively separate the photo-induced electron-hole pairs and suppress their recombination.展开更多
基金The project supported by National Natural Science Foundation of China under Grant No.10275014
文摘The energy spectra of the ground state for an exciton (X) trapped by a neutral acceptor (A<SUP>0</SUP>) in a quantum dot with a parabolic confinement have been calculated as a function of the electron-to-hole mass ratio σ by using the hyperspherical coordinates. We find that the (A<SUP>0</SUP>,X) complex confined in a quantum dot has in general a larger binding energy than those in a two-dimensional quantum well and a three-dimensional bulk semiconductor, and the binding energy decreases with the increase of the electron-to-hole mass ratio.
文摘The Su-Schrieffer-Heeger Hamiltonian and the Hubbard Hamiltonian within the unrestricted Hartree-Fock scheme have been used to study the effects of e-e interaction on lattice distortions and electronic structures of C-60, C2-60, C+60, C2+60, When the interaction parameter increases from 0 to 3 eV, the bond variables of the C60 molecules are altered slightly, but the polaron energy levels and the charge density distributions of the C60 molecules are modified seriously.
基金supported by the National Natural Science Foundation of China (21371023)the National Key Basic Research Program of China (2015CB251100)
文摘We demonstrate the fabrication of BiOCl/Bi_2S_3 which is well defined at a large scale. The BiOCl/Bi_2S_3 heterostructures exhibit an enhanced photo-catalytic degradation of methyl orange（MO） compared to BiOCl and Bi_2S_3, attributed to the interface between Bi_2S_3 and BiOCl, which effectively separate the photo-induced electron-hole pairs and suppress their recombination.
