Intense green luminescence associated with two-fold coordinated Si in silica aerogel doped with Al3+

被引:9
作者
Li, YH [1 ]
Mo, CM
Yao, LZ
Liu, RC
Cai, WL
Li, XM
Wu, ZQ
Zhang, LD
机构
[1] Univ Sci & Technol China, Dept Mat Sci & Engn, Hefei 230026, Peoples R China
[2] Univ Sci & Technol China, Ctr Fundamental Phys, Hefei 230026, Peoples R China
[3] Acad Sinica, Inst Solid State Phys, Hefei 230031, Peoples R China
关键词
D O I
10.1088/0953-8984/10/7/013
中图分类号
O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
Amorphous silica aerogels doped with Al3+ ions (SADAs) were prepared by the sol-gel route and supercritical drying. The visible luminescence of SADAs was measured and compared with that of porous silicon (PS), pure silica aerogels (PSAs) and silica xerogels doped with Al3+ ions (SXDAs). The effect of annealing on the luminescence intensity of SADAs was investigated. Results show that (1) the luminescent intensity of as-prepared SADAs is much higher than that of as-prepared PSAs and SXDAs after annealing at 300 degrees C; (2) after annealing at 500 degrees C, the visible luminescence of SADAs is further substantially enhanced and becomes much higher than that of PS. However, for PSAs and SXDAs after annealing at 500 degrees C the luminescent intensity is still kept at a very low value in comparison with that of SADAs. The strong visible luminescence appearing in SADAs is ascribed to significant amounts of the twofold coordinated Si (the Si(II)(0) (neutral) centre) in SADAs.
引用
收藏
页码:1655 / 1664
页数:10
相关论文
共 16 条
  • [1] LUMINESCENCE OF DONAR-ACCEPTOR PAIRS IN CUBIC SIC
    CHOYKE, WJ
    PATRICK, L
    [J]. PHYSICAL REVIEW B, 1970, 2 (12): : 4959 - &
  • [2] Synthesis and photoluminescence of weblike agglomeration of silica nanoparticles
    ElShall, MS
    Li, S
    Turkki, T
    Graiver, D
    Pernisz, UC
    Baraton, MI
    [J]. JOURNAL OF PHYSICAL CHEMISTRY, 1995, 99 (51) : 17805 - 17809
  • [3] SITE EFFECT ON THE IMPURITY LEVELS IN H-4, 6H, AND 15R SIC
    IKEDA, M
    MATSUNAMI, H
    TANAKA, T
    [J]. PHYSICAL REVIEW B, 1980, 22 (06): : 2842 - 2854
  • [4] OPTICAL CHARACTERIZATIONS OF PHOTOINDUCED CHEMICAL-VAPOR-DEPOSITION PRODUCED SIO2-FILMS IN VACUUM-ULTRAVIOLET, ULTRAVIOLET, AND VISIBLE REGION
    KANASHIMA, T
    NAGAYOSHI, R
    OKUYAMA, M
    HAMAKAWA, Y
    [J]. JOURNAL OF APPLIED PHYSICS, 1993, 74 (09) : 5742 - 5747
  • [5] KOLESOVA VA, 1960, STRUCT GLASS, V2, P177
  • [6] PHOTOLUMINESCENCE OF SM DOPED POROUS SILICON - EVIDENCE FOR LIGHT-EMISSION THROUGH LUMINESCENCE-CENTERS IN SIO2 LAYERS
    LIN, J
    ZHANG, LZ
    HUANG, YM
    ZHANG, BR
    QIN, GG
    [J]. APPLIED PHYSICS LETTERS, 1994, 64 (24) : 3282 - 3284
  • [7] BLUE-GREEN LUMINESCENCE FROM POROUS SILICON-CARBIDE
    MATSUMOTO, T
    TAKAHASHI, J
    TAMAKI, T
    FUTAGI, T
    MIMURA, H
    KANEMITSU, Y
    [J]. APPLIED PHYSICS LETTERS, 1994, 64 (02) : 226 - 228
  • [8] BLUE-LIGHT EMISSION FROM RAPID-THERMAL-OXIDIZED POROUS SILICON
    MIMURA, H
    FUTAGI, T
    MATSUMOTO, T
    NAKAMURA, T
    KANEMITSU, Y
    [J]. JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS, 1994, 33 (1B): : 586 - 589
  • [9] NISHIKAWA H, 1996, P ELECTROCHEM SOC, V96, P418
  • [10] OPTICAL PROPERTIES OF NON-CRYSTALLINE SI, SIO, SIOX AND SIO2
    PHILIPP, HR
    [J]. JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, 1971, 32 (08) : 1935 - &