Investigation of Structured Green-Band Emission and Electron-Phonon Interactions in Vertically Aligned ZnO Nanowires

被引：28

作者：

Chen, Rui ^{[1
]}

Tay, Yeeyan ^{[2
]}

Ye, Jun ^{[2
]}

Zhao, Yang ^{[2
]}

Xing, Guozhong ^{[1
]}

Wu, Tom ^{[1
]}

Sun, Handong ^{[1
]}

机构：

[1] Nanyang Technol Univ, Div Phys & Appl Phys, Sch Phys & Math Sci, Singapore 637371, Singapore

[2] Nanyang Technol Univ, Div Mat Sci, Sch Mat Sci & Engn, Singapore 639798, Singapore

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2010年 / 114卷 / 41期

基金：

新加坡国家研究基金会;

关键词：

ZNO/ZNMGO MULTIQUANTUM WELLS; ZINC-OXIDE; COPPER IMPURITIES; LUMINESCENCE BAND; TEMPERATURE; MODULATION; DEPENDENCE; EPITAXY; SYSTEM; GROWTH;

D O I：

10.1021/jp1064209

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We have investigated the green band (GB) emission from vertically aligned ZnO nanowires (NWs) prepared by vapor-liquid-solid growth technique. At low temperatures, the GB emission consists of two sets of zero phonon lines and their phonon replicas independent of the laser excitation power. Temperature-dependent photoluminescence (PL) measurement is performed at temperatures from 10 to 300 K. and the thermal evolution of peak widths and the origin of PL quenching at high temperatures are discussed in detail. The multimode Brownian oscillator model is adopted to reproduce the structured GB and to determine the Huang-Rhys factor. It is found that the two electronic transitions are strongly coupled to different LO phonon modes, and the size-dependent electron-phonon coupling strength is examined.

引用

页码：17889 / 17893

页数：5

共 38 条

[1] A comparative analysis of deep level emission in ZnO layers deposited by various methods [J].

Ahn, Cheol Hyoun ;

Kim, Young Yi ;

Kim, Dong Chan ;

Mohanta, Sanjay Kumar ;

Cho, Hyung Koun .

JOURNAL OF APPLIED PHYSICS, 2009, 105 (01)

[2] QUANTUM TUNNELLING IN A DISSIPATIVE SYSTEM [J].

CALDEIRA, AO ;

LEGGETT, AJ .

ANNALS OF PHYSICS, 1983, 149 (02) :374-456

[3] RESONANT RAMAN-SCATTERING IN ZNO [J].

CALLEJA, JM ;

CARDONA, M .

PHYSICAL REVIEW B, 1977, 16 (08) :3753-3761

[4] Size-dependent dynamics of coherent acoustic phonons in nanocrystal quantum dots [J].

Cerullo, G ;

De Silvestri, S ;

Banin, U .

PHYSICAL REVIEW B, 1999, 60 (03) :1928-1932

[5] Zone-folding effect on optical phonon in GaN/Al0.2Ga0.8N superlattices [J].

Chen, CH ;

Chen, YF ;

Shih, A ;

Lee, SC ;

Jiang, HX .

APPLIED PHYSICS LETTERS, 2001, 78 (20) :3035-3037

[6] Characteristics of ultraviolet photoluminescence from high quality tin oxide nanowires [J].

Chen, Rui ;

Xing, G. Z. ;

Gao, J. ;

Zhang, Z. ;

Wu, T. ;

Sun, H. D. .

APPLIED PHYSICS LETTERS, 2009, 95 (06)

[7] RAMAN EFFECT IN ZINC OXIDE [J].

DAMEN, TC ;

PORTO, SPS ;

TELL, B .

PHYSICAL REVIEW, 1966, 142 (02) :570-&

[8] LUMINESCENT TRANSITIONS ASSOCIATED WITH DIVALENT COPPER IMPURITIES AND GREEN EMISSION FROM SEMICONDUCTING ZINC OXIDE [J].

DINGLE, R .

PHYSICAL REVIEW LETTERS, 1969, 23 (11) :579-&

[9] Defect emissions in ZnO nanostructures [J].

Djurisic, A. B. ;

Leung, Y. H. ;

Tam, K. H. ;

Hsu, Y. F. ;

Ding, L. ;

Ge, W. K. ;

Zhong, Y. C. ;

Wong, K. S. ;

Chan, W. K. ;

Tam, H. L. ;

Cheah, K. W. ;

Kwok, W. M. ;

Phillips, D. L. .

NANOTECHNOLOGY, 2007, 18 (09)

[10] Green, yellow, and orange defect emission from ZnO nanostructures: Influence of excitation wavelength [J].

Djurisic, AB ;

Leung, YH ;

Tam, KH ;

Ding, L ;

Ge, WK ;

Chen, HY ;

Gwo, S .

APPLIED PHYSICS LETTERS, 2006, 88 (10)

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