Self-assembled ZnO quantum dots with tunable optical properties

被引:84
作者
Lu, J. G. [1 ]
Ye, Z. Z.
Zhang, Y. Z.
Liang, Q. L.
Fujita, Sz.
Wang, Z. L.
机构
[1] Zhejiang Univ, State Key Lab Silicon Mat, Hangzhou 310027, Peoples R China
[2] Semicond Mfg Int Corp, Qual Engn Div, Shanghai 201203, Peoples R China
[3] Kyoto Univ, Int Innovat Ctr, Nishikyo Ku, Kyoto 6158520, Japan
[4] Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA
基金
中国国家自然科学基金;
关键词
D O I
10.1063/1.2221892
中图分类号
O59 [应用物理学];
学科分类号
摘要
Self-assembled ZnO quantum dots (QDs) were achieved by a vapor phase transport process. ZnO nanodots were naturally formed on solid substrates in the Volmer-Weber growth mode. Size control of nanodots could be readily realized by varying the growth time. The as-prepared ZnO QDs are of high quality and very stable after formation. The blueshift of band gap energies derived from quantum confinement effects was confirmed by optical absorption spectra. Photoluminescence spectra revealed the tunable behavior of ultraviolet luminescence due to exciton localization. The realization of size-tuned color from ZnO QDs makes them more promising for practical applications. (c) 2006 American Institute of Physics.
引用
收藏
页数:3
相关论文
共 18 条
[1]   SELECTIVE EXCITATION OF THE PHOTOLUMINESCENCE AND THE ENERGY-LEVELS OF ULTRASMALL INGAAS/GAAS QUANTUM DOTS [J].
FAFARD, S ;
LEONARD, D ;
MERZ, JL ;
PETROFF, PM .
APPLIED PHYSICS LETTERS, 1994, 65 (11) :1388-1390
[2]   Comment on "Giant exciton-light coupling in ZnO quantum dots" [Appl. Phys. Lett. 81, 748 (2002)] [J].
Fonoberov, VA ;
Balandin, AA .
APPLIED PHYSICS LETTERS, 2005, 86 (22) :1-2
[3]   Radiative lifetime of excitons in ZnO nanocrystals: The dead-layer effect [J].
Fonoberov, VA ;
Balandin, AA .
PHYSICAL REVIEW B, 2004, 70 (19) :1-5
[4]   Origin of ultraviolet photoluminescence in ZnO quantum dots: Confined excitons versus surface-bound impurity exciton complexes [J].
Fonoberov, VA ;
Balandin, AA .
APPLIED PHYSICS LETTERS, 2004, 85 (24) :5971-5973
[5]   Highly monodisperse polymer-capped ZnO nanoparticles: Preparation and optical properties [J].
Guo, L ;
Yang, SH ;
Yang, CL ;
Yu, P ;
Wang, JN ;
Ge, WK ;
Wong, GKL .
APPLIED PHYSICS LETTERS, 2000, 76 (20) :2901-2903
[6]   QUANTUM-SIZE EFFECTS OF INTERACTING ELECTRONS AND HOLES IN SEMICONDUCTOR MICROCRYSTALS WITH SPHERICAL SHAPE [J].
KAYANUMA, Y .
PHYSICAL REVIEW B, 1988, 38 (14) :9797-9805
[7]   Artificial control of ZnO nanodots by ion-beam nanopatterning [J].
Kim, SW ;
Ueda, M ;
Funato, M ;
Fujita, S ;
Fujita, S .
JOURNAL OF APPLIED PHYSICS, 2005, 97 (10)
[8]   Fabrication of ZnSe quantum dots under Volmer-Weber mode by metalorganic chemical vapor deposition [J].
Liao, MCH ;
Chang, YH ;
Chen, YF ;
Hsu, JW ;
Lin, JM ;
Chou, WC .
APPLIED PHYSICS LETTERS, 1997, 70 (17) :2256-2258
[9]   ZnO quantum dots synthesized by a vapor phase transport process [J].
Lu, JG ;
Ye, ZZ ;
Huang, JY ;
Zhu, LP ;
Zhao, BH ;
Wang, ZL ;
Fujita, S .
APPLIED PHYSICS LETTERS, 2006, 88 (06)
[10]   X-ray study of strain and composition of Si/Ge0.85Si0.15 (111) islands grown in Volmer-Weber mode [J].
Malachias, A ;
Magalhaes-Paniago, R ;
Kycia, S ;
Cahill, DG .
JOURNAL OF APPLIED PHYSICS, 2004, 96 (06) :3234-3238