Experimental study of LO phonons and excitons in ZnO nanoparticles produced by room-temperature organometallic synthesis - art. no. 071921

被引：56
作者：
Demangeot, F
Paillard, V
Chassaing, PM
Pagès, C
Kahn, ML
Maisonnat, A
Chaudret, B
机构：
[1] Univ Toulouse 3, CNRS, IRSAMC, UMR 5477,Lab Phys Solides Toulouse, F-31062 Toulouse 4, France
[2] CNRS, Chim Coordinat Lab, UPR 8241, F-31077 Toulouse 4, France
来源：
APPLIED PHYSICS LETTERS | 2006年 / 88卷 / 07期
关键词：
D O I：
10.1063/1.2177545
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We report here the study by optical microspectroscopy of crystalline ZnO nanoparticles produced by room-temperature organometallic synthesis. We present resonant Raman scattering spectrum obtained from different sized nanostructures from which the longitudinal-optical (LO) phonon frequency has been found to be very weakly dependent on their size. Low-temperature photoluminescence measurements reveal that (i) the band-edge PL of ZnO nanoparticles is dominated by weakly bound localized exciton, and that (ii) its energy does not exhibit any spatial confinement effect. These results enlighten the need for surface passivation of the nanoparticles to improve their UV emission potential.
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共 15 条
[1]   Origin of the optical phonon frequency shifts in ZnO quantum dots [J].
Alim, KA ;
Fonoberov, VA ;
Balandin, AA .
APPLIED PHYSICS LETTERS, 2005, 86 (05) :1-3
[2]  
DAGDAR A, 2005, SUPERLATTICES MICOST, V38, P245
[3]   Interface and confined optical phonons in wurtzite nanocrystals [J].
Fonoberov, VA ;
Balandin, AA .
PHYSICAL REVIEW B, 2004, 70 (23) :1-4
[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]   Spontaneous formation of ordered 2D and 3D superlattices of ZnO nanocrystals [J].
Kahn, ML ;
Monge, M ;
Snoeck, E ;
Maisonnat, A ;
Chaudret, B .
SMALL, 2005, 1 (02) :221-224
[6]   Formation and luminescence of ZnO nanoparticles embedded in MgO films [J].
Ma, JG ;
Liu, YC ;
Shao, CL ;
Zhang, JY ;
Lu, YM ;
Shen, DZ ;
Fan, XW .
PHYSICAL REVIEW B, 2005, 71 (12)
[7]   Doping engineering of p-type ZnO [J].
Marfaing, Y ;
Lusson, A .
SUPERLATTICES AND MICROSTRUCTURES, 2005, 38 (4-6) :385-396
[8]   Room-temperature organometallic synthesis of soluble and crystalline ZnO nanoparticles of controlled size and shape [J].
Monge, M ;
Kahn, ML ;
Maisonnat, A ;
Chaudret, B .
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2003, 42 (43) :5321-5324
[9]   Structural and electronic properties of ZnMgO/ZnO quantum wells [J].
Morhain, C ;
Tang, X ;
Teisseire-Doninelli, M ;
Lo, B ;
Laügt, M ;
Chauveau, JM ;
Vinter, B ;
Tottereau, O ;
Vennéguès, P ;
Deparis, C ;
Neu, G .
SUPERLATTICES AND MICROSTRUCTURES, 2005, 38 (4-6) :455-463
[10]   Optical phonon confinement in zinc oxide nanoparticles [J].
Rajalakshmi, M ;
Arora, AK ;
Bendre, BS ;
Mahamuni, S .
JOURNAL OF APPLIED PHYSICS, 2000, 87 (05) :2445-2448
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