Photoluminescence properties of Co-doped ZnO nanorods synthesized by hydrothermal method

Title:	Photoluminescence properties of Co-doped ZnO nanorods synthesized by hydrothermal method
Authors:	Trinh, Thi Loan Nguyen, Ngoc Long Le, Hong Ha
Keywords:	CHEMICAL-VAPOR-DEPOSITION;MOLECULAR-BEAM EPITAXY;OPTICAL-PROPERTIES;GROWTH;NANOSTRUCTURES;SEMICONDUCTORS
Issue Date:	2009
Publisher:	IOP PUBLISHING LTD, DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
Citation:	ISIKNOWLEDGE
Abstract:	Cobalt doped zinc oxide nanorods Zn1−xCoxO(x=0.01, 0.10) have been synthesized by a hydrothermal process with Zn(NO3)2, Co(NO3)2,NH4OH, CO(NH2)2and C2H5OH at 150 ◦ C for 1 h. X-ray diffraction and scanning electron microscopy were used to characterize the crystalline structure, size and morphology of the samples. The photoluminescence (PL) and the PL excitation spectra of the nanorods were measured in the range of temperature from 15K to room temperature. The PL spectra at low temperatures exhibit a group of ultraviolet narrow lines in the near-band-edge region of 3.0–3.4 eV and a very broad band peaked at 3.20 eV. The origin of the near-band-edge PL is interpreted as an emission from free excitons, neutral donor-bound excitons, radiative transitions from a donor to the valence band and donor–acceptor pairs. In particular, a group of emission lines in the red region of 1.8–1.9 eV have been revealed. These emission lines were assigned to the radiative transitions within the tetrahedral Co 2+ ions in the ZnO host crysta
Description:	TNS07488 ; JOURNAL OF PHYSICS D-APPLIED PHYSICS Volume: 42 Issue: 6 ; 8 p.
URI:	http://repository.vnu.edu.vn/handle/VNU_123/30533 http://iopscience.iop.org/article/10.1088/0022-3727/42/6/065412/meta
ISSN:	0022-3727
Appears in Collections:	Bài báo của ĐHQGHN trong Web of Science