Microstructure and optical properties of nanocrystalline CaWO4 thin films deposited by pulsed laser ablation in room temperature

被引：0
|
作者：
Ryu, Jeong Ho [1 ,2 ]
Bang, Sin Young [2 ]
Kim, Woo Sik [2 ]
Park, Gyeong Seon [2 ]
Kim, Kang Min [2 ]
Yoon, Jong-Won [2 ]
Shim, Kwang Bo [2 ]
Koshizaki, Naoto [3 ]
机构：
[1] Electro Materials and Device Laboratory, Cooperate R and D Institute, Samsung Electro-Mechanics Co., Ltd., 314, Maetan3-Dong, Yeongtong-Gu, Suwon City, Gyunggi-Do 443-743, Korea, Republic of
[2] Department of Ceramic Engineering, Ceramic Processing Research Center (CPRC), Hanyang University, 17 Haengdang-Dong, Seongdong-Gu, Seoul, 133-791, Korea, Republic of
[3] Nanoarchitectonics Research Center (NARC), National Institute of Advanced Industrial Science and Technology (AIST), Central 5 1-1-1 Higashi, Tsukuba, Ibaraki, 305-8565, Japan
来源：
Journal of Alloys and Compounds | 2007年 / 441卷 / 1-2期
关键词：
Nanocrystalline CaWO4 films were successfully deposited by pulsed laser ablation at various background Ar gas pressures (10-100 Pa) without substrate heating or after annealing treatment. The effects of Ar pressure on microstructure; surface morphology; chemical composition and optical properties were investigated by XRD; HR-TEM; FE-SEM; XPS; UV-vis and PL analyses. The crystallite size of CaWO4 films increased with increasing Ar pressure; which was associated with a change of surface morphology. Reduced tungsten states [W5+] or [W4+] caused by oxygen vacancies were observed at 10 Pa. However; over; 50; Pa; the atomic concentration of all the constituent elements was almost constant; especially; Ca]/[W; ratio; which was nearly unity. The optical energy band-gap of CaWO4 films was strongly dependent on the Ar pressure; i.e; decreased from 4.9 to 4.5 eV with the increase of Ar pressure from 50 to 100 Pa. The photoluminescence (PL) spectra was positioned in a blue-shifted region around 378 nm compared with emission at 420 nm of bulk CaWO4 target; which clearly demonstrates the optical band-gap widening phenomena induced by quantum-size effect. © 2006 Elsevier B.V. All rights reserved;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Journal article (JA)
引用
收藏
页码：146 / 151
相关论文
共 50 条
  • [31] Nanostructured silver thin films deposited by pulsed laser ablation
    Fazio, B.
    Trusso, S.
    Fazio, E.
    Neri, F.
    Ossi, P. M.
    Santo, N.
    RADIATION EFFECTS AND DEFECTS IN SOLIDS, 2008, 163 (08): : 673 - 683
  • [32] Characterization of Hastelloy thin films deposited by pulsed laser ablation
    Vignolo, MF
    Avram, I
    Duhalde, S
    Morales, C
    Pérez, T
    Cultrera, L
    Perrone, A
    Zocco, A
    APPLIED SURFACE SCIENCE, 2002, 197 : 343 - 347
  • [33] Zirconium carbide thin films deposited by pulsed laser ablation
    D'Alessio, L
    Santagata, A
    Teghil, R
    Zaccagnino, M
    Zaccardo, I
    Marotta, V
    Ferro, D
    De Maria, G
    APPLIED SURFACE SCIENCE, 2000, 168 (1-4) : 284 - 287
  • [34] Optical properties of silicon nanocrystalline thin films grown by pulsed laser deposition
    Kim, JH
    Jeon, KA
    Kim, GH
    Lee, SY
    OPTICAL MATERIALS, 2005, 27 (05) : 991 - 994
  • [35] Mechanical properties of pulsed laser deposited nanocrystalline SiC films
    Craciun, D.
    Socol, G.
    Cristea, D. V.
    Stoicanescu, M.
    Olah, N.
    Balazs, K.
    Stefan, N.
    Lambers, E.
    Craciun, V.
    APPLIED SURFACE SCIENCE, 2015, 336 : 391 - 395
  • [36] Pulsed-laser deposited amorphous-like PZT thin-films: Microstructure and optical properties
    Lappalainen, J.
    Puustinen, J.
    Hiltunen, J.
    Lantto, V.
    JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 2010, 30 (02) : 497 - 502
  • [37] Mono-Disperse CaWO4 Microsphere with Hierarchical Structures: Room Temperature Synthesis and its Optical Properties
    Zeng, Suyuan
    Tang, Rongfeng
    Su, Huaifen
    Duan, Shengxia
    Sun, Yuanwei
    Li, Lei
    Sun, Dezhi
    NANO, 2016, 11 (04)
  • [38] Structural and optical properties of PLZT thin films deposited by pulsed laser deposition
    Lancok, J
    Jelínek, M
    Escoubas, L
    Flory, F
    11TH INTERNATIONAL SCHOOL ON QUANTUM ELECTRONICS: LASER PHYSICS AND APPLICATIONS, 2001, 4397 : 305 - 308
  • [39] Structural and optical properties of pulsed laser deposited cadmium telluride thin films
    Dashtoyan, H. R.
    Avjyan, K. E.
    Matevosyan, L. A.
    Smbatyan, S. V.
    4TH INTERNATIONAL SCHOOL AND CONFERENCE ON OPTOELECTRONICS, PHOTONICS, ENGINEERING AND NANOSTRUCTURES (SAINT PETERSBURG OPEN 2017), 2017, 917
  • [40] Physical investigations on pulsed laser deposited nanocrystalline ZnO thin films
    K. Srinivasarao
    B. Rajinikanth
    K. Pandurangarao
    P. K. Mukhopadhyay
    Applied Physics A, 2012, 108 : 247 - 254
12345