TY - JOUR
T1 - Optical and structural properties of self-assembled ZnO QD chains by L-MBE
AU - Zhen, Bi
AU - Jingwen, Zhang
AU - Xiaodong, Yang
AU - Dong, Wang
AU - Xin'an, Zhang
AU - Weifeng, Zhang
AU - Xun, Hou
PY - 2007/5/15
Y1 - 2007/5/15
N2 - ZnO complex 3D nano-structures have been self-organized on Al2O3 (0 0 0 1) substrate by laser molecular beam epitaxy (L-MBE). It is shown by AFM morphology that the structure is composed of 1D quantum dot chains (QDCs) and larger nano-islands at the nodes of QDCs. The formation mechanism of the nano-structure is also investigated. XRD results indicate that the nano-structure is highly c-axis oriented, with the aligned in-plane oriented domains. Time-integrated photoluminescence (TIPL) of the sample shows obvious blue-shift and broadening of the near band-edge (NBE) emission at room temperature, which are related to the quantum confinement effects. Time-resolved PL (TRPL) result shows bi-exponential decay behavior of ZnO QDCs, with a fast decay time of 38.21 ps and a low decay time of 138.19 ps, respectively, which is considered to be originated from the interdot coupling made by coherent emission and reabsorption of the photons in QDCs.
AB - ZnO complex 3D nano-structures have been self-organized on Al2O3 (0 0 0 1) substrate by laser molecular beam epitaxy (L-MBE). It is shown by AFM morphology that the structure is composed of 1D quantum dot chains (QDCs) and larger nano-islands at the nodes of QDCs. The formation mechanism of the nano-structure is also investigated. XRD results indicate that the nano-structure is highly c-axis oriented, with the aligned in-plane oriented domains. Time-integrated photoluminescence (TIPL) of the sample shows obvious blue-shift and broadening of the near band-edge (NBE) emission at room temperature, which are related to the quantum confinement effects. Time-resolved PL (TRPL) result shows bi-exponential decay behavior of ZnO QDCs, with a fast decay time of 38.21 ps and a low decay time of 138.19 ps, respectively, which is considered to be originated from the interdot coupling made by coherent emission and reabsorption of the photons in QDCs.
KW - A1. Low dimensional structures
KW - A3. Laser epitaxy
KW - B2. Semiconducting II-VI materials
UR - https://www.scopus.com/pages/publications/34247247269
U2 - 10.1016/j.jcrysgro.2006.12.077
DO - 10.1016/j.jcrysgro.2006.12.077
M3 - 文章
AN - SCOPUS:34247247269
SN - 0022-0248
VL - 303
SP - 407
EP - 413
JO - Journal of Crystal Growth
JF - Journal of Crystal Growth
IS - 2
ER -