| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
|
|
|
|
Sol-Gel Template Synthesis and Photoluminescence Properties of (Pb0.5Sr0.5)TiO3 Nanotube Arrays |
| JIANG Yan-Ping1,2,3**, WANG Yu2, CHAN Lai Wa Helen2, TANG Xin-Gui3, ZHOU Yi-Chun1**
|
1 Key Laboratory of Low-Dimensional Materials and Application Technology, Xiangtan University, Xiangtan 411105
2 Department of Applied Physics and Materials Research Centre, Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
3 School of Physics & Optoelectric Engineering, and Guangzhou Higher Education Mega Center, Guangdong University of Technology, Guangzhou 510006
|
|
| Cite this article: |
|
JIANG Yan-Ping, WANG Yu, CHAN Lai Wa Helen et al 2011 Chin. Phys. Lett. 28 077702 |
|
|
|
|
Abstract Lead strontium titanate (Pb0.5Sr0.5)TiO3 (PST) nanotube arrays are prepared by a sol-gel and spin-coating process using an anodic aluminium oxide template. The structure and morphology of the as-prepared sample are characterized by x-ray diffraction, scanning electron microscopy and transmission electron microscopy. The results show that the as-prepared PST sample possesses a perovskite structure with a relatively uniform diameter of about 200 nm. Photoluminescence (PL) spectrum of the sample shows emission bands centered at about 2.87 eV at room temperature, which consists of three intense emission sub-bands at 3.02, 2.87 and 2.76 eV, respectively. The energy corresponding to the central PL peak is lower than the band-gap energy (3.2 eV) of PST bulk materials, which may originate from the size effect of the PST nanotube arrays. The multi-peaks in the PL spectrum may be attributed to the radiative recombination of trapped electrons and holes in tail and gap states induced by local defect and oxygen vacancies. The Raman scattering spectrum of the PST nanotube arrays, which are obviously broadened in comparison with the bulk materials, show that their phonon modes are in agreement with those allowed in the tetragonal phase.
|
| Keywords:
77.84.Lf
78.30.-j
78.67.-c
|
|
|
Received: 28 March 2011
Published: 29 June 2011
|
|
|
|
|
|
|
|
[1] Ahn CH, Rabe KM and Triscone JM 2004 Science 303 488
[2] Scott JF 2007 Science 315 954
[3] Luo Y et al 2003 Appl. Phys. Lett. 83 440
[4] Urban JJ et al 2003 Adv. Mater. 15 423
[5] Karthäuser S, Vasco E, Dittmann R and Waser R 2004 Nanotechnology 15 S122
[6] Liao M, Zhong XL, Wang JB, Xie SH, Zhou YC 2010 Appl. Phys. Lett. 96 012904
[7] Yang Y, Wang X, Zhong C, Sun C and Li L 2008 Appl. Phys. Lett. 92 122907
[8] Jain M, Yuzyuk YI, Katiyar RS, Somiya Y and Bhalla AS 2005 J. Appl. Phys. 98 024116
[9] Liu SW et al 2005 Appl. Phys. Lett. 87 142905
[10] Cheng TD et al 2010 Rare Metal Mater. Eng. 39 (Suppl.2) 65 (in Chinese)
[11] Leal SH et al 2009 J. Alloys Compd. 475 940
[12] Rivera I, Kumar A, Mendoza F and Katiyar R S 2008 Physica B 403 2423
[13] Khan AF, Mehmood M, Aslam M and Ashraf M 2010 Appl. Surf. Sci. 256 2252
[14] Hu Y, Gu H, Sun X and You J 2006 Appl. Phys. Lett. 88 193120
[15] Leite ER et al 2001 Appl. Phys. Lett. 78 2148
[16] Orhan E et al 2005 Phys. Rev. B 71 085113
[17] Vanheusden K et al 1995 Appl. Phys. Lett. 67 1280
[18] Luo L et al 2008 J. Appl. Phys. 104 043514
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
