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
  • [1] Microstructure and optical properties of nanocrystalline CaWO4 thin films deposited by pulsed laser ablation in room temperature
    Ryu, Jeong Ho
    Bang, Sin Young
    Kim, Woo Sik
    Park, Gyeong Seon
    Kim, Kang Min
    Yoon, Jong-Won
    Shim, Kwang Bo
    Koshizaki, Naoto
    JOURNAL OF ALLOYS AND COMPOUNDS, 2007, 441 (1-2) : 146 - 151
  • [2] Room-temperature deposition of nanocrystalline CaWO4 films by pulsed laser and their optical properties
    Ryu, Jeong Ho
    Yoon, Jong-Won
    Shim, Kwang Bo
    Sasaki, Takeshi
    Koshizaki, Naoto
    JOURNAL OF APPLIED PHYSICS, 2006, 99 (08)
  • [3] CaWO4 thin films synthesized by pulsed laser deposition
    Tanaka, K
    Fukui, K
    Ohga, K
    Choo, CK
    JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A-VACUUM SURFACES AND FILMS, 2002, 20 (02): : 486 - 491
  • [4] Structural, electrical and optical properties of nanocrystalline silicon thin films deposited by pulsed laser ablation
    Khan, M. A. Majeed
    Kumar, Sushil
    Ahamed, Maqusood
    MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING, 2015, 30 : 169 - 173
  • [5] Synthesis of CaWO4 nanocolloidal suspension via pulsed laser ablation and its optical properties
    Jeong Ho Ryu
    Gyeong Seon Park
    Kang Min Kim
    Chang Sung Lim
    Jong-Won Yoon
    Kwang Bo Shim
    Applied Physics A, 2007, 88 : 731 - 736
  • [6] Synthesis of CaWO4 nanocolloidal suspension via pulsed laser ablation and its optical properties
    Ryu, Jeong Ho
    Park, Gyeong Seon
    Kim, Kang Min
    Lim, Chang Sung
    Yoon, Jong-Won
    Shim, Kwang Bo
    APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, 2007, 88 (04): : 731 - 736
  • [7] Room-temperature deposition of nanocrystalline PbWO4 thin films by pulsed laser ablation
    Ryu, J. H.
    Yoon, J. -W.
    Shim, K. B.
    Koshizaki, N.
    APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, 2006, 84 (1-2): : 181 - 185
  • [8] Room-temperature deposition of nanocrystalline PbWO4 thin films by pulsed laser ablation
    J.H. Ryu
    J.-W. Yoon
    K.B. Shim
    N. Koshizaki
    Applied Physics A, 2006, 84 : 181 - 185
  • [9] Effect of substrate temperature on the optical properties of CaBi4Ti4O15 thin films deposited by pulsed laser ablation
    Sivanagi Reddy Emani
    K. C. James Raju
    Journal of Materials Science: Materials in Electronics, 2016, 27 : 10822 - 10832
  • [10] Effect of substrate temperature on the optical properties of CaBi4Ti4O15 thin films deposited by pulsed laser ablation
    Emani, Sivanagi Reddy
    Raju, K. C. James
    JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS, 2016, 27 (10) : 10822 - 10832
12345