Tạp Chí GS Dỏm Việt Nam

Journal of Incompetent Professors in Vietnam – JIPV

PGS dỏm cấp 1 Lê Hồng Hà, Khoa Vật lí, ĐHKHTN, ĐHQG Hà Nội

Posted by giaosudom4 trên Tháng Tám 10, 2010

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Tạp Chí GS Dỏm Việt Nam – JIPV says:

Danh dỏm: PGS

Công bố ISI: 1

Danh thật: PGS dỏm.

Đề cử: honhatanh07

Thông tin bởi honhatanh07: PGS dỏm Lê Hồng Hà là phu nhân của PGS dỏm Hoàng Văn Phong.

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

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Author(s): Loan TT (Loan, Trinh Thi)1, Long NN (Long, Nguyen Ngoc)1, Ha LH (Ha, Le Hong)1
Source: JOURNAL OF PHYSICS D-APPLIED PHYSICS Volume: 42 Issue: 6 Article Number: 065412 Published: MAR 21 2009
Times Cited: 1 References: 31 Citation MapCitation Map
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)(2) and C2H5OH at 150 degrees 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 Co2+ ions in the ZnO host crystal.
Document Type: Article
Language: English
KeyWords Plus: CHEMICAL-VAPOR-DEPOSITION; MOLECULAR-BEAM EPITAXY; OPTICAL-PROPERTIES; GROWTH; NANOSTRUCTURES; SEMICONDUCTORS; CRYSTALS; SPECTRA; GAP
Reprint Address: Long, NN (reprint author), Hanoi Univ Sci, Fac Phys, 334 Nguyen Trai Rd, Hanoi, Vietnam
Addresses:
1. Hanoi Univ Sci, Fac Phys, Hanoi, Vietnam
E-mail Addresses: longnn@vnu.edu.vn
Funding Acknowledgement:
Funding AgencyGrant Number
European Commission
516922
Natural Science Council, Ministry of Science and Technology of Vietnam
4 055 06
[Show funding text]

The authors thank the European Commission Project Selectnano-TTC (Contract No 516922) and the Natural Science Council, Ministry of Science and Technology of Vietnam (Project 4 055 06), for financial assistance. They also thank Dr Nguyen Hoang Nam (Graduate School of Science, Osaka University) for transmission measurements.
Publisher: IOP PUBLISHING LTD, DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
Subject Category: Physics, Applied
IDS Number: 413WU
ISSN: 0022-3727
DOI: 10.1088/0022-3727/42/6/065412
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