Synthesis and optical properties of europium-doped zns: long-lasting phosphorescence from aligned nanowires | |
Cheng, BC; Wang, ZG | |
刊名 | Advanced functional materials
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2005-11-01 | |
卷号 | 15期号:11页码:1883-1890 |
ISSN号 | 1616-301X |
DOI | 10.1002/adfm.200500092 |
通讯作者 | Cheng, bc(bcheng@vip.sina.com) |
英文摘要 | Quasi-aligned eu2+-doped wurtzite zns nanowires on au-coated si wafers have been successfully synthesized by a vapor deposition method under a weakly reducing atmosphere. compared with the undoped counterpart, incorporation of the dopant gives a modulated composition and crystal structure, which leads to a preferred growth of the nanowires along the [0110] direction and a high density of defects in the nanowire hosts. the ion doping causes intense fluorescence and persistent phosphorescence in zns nanowires. the dopant eu2+ ions form an isoelectronic acceptor level and yield a high density of bound excitions, which contribute to the appearance of the radiative recombination emission of the bound excitons and resonant raman scattering at higher pumping intensity. co-dopant cl- ions can serve not only as donors, producing a donor-acceptor pair transition with the eu2+ acceptor level, but can also form trap levels together with other defects, capture the photoionization electrons of eu2+, and yield long-lasting (about 4 min), green phosphorescence. with decreasing synthesis time, the existence of more surface states in the nanowires forms a higher density of trap centers and changes the crystal-field strength around eu2+. as a result, not only have an enhanced eu2+ -4f(6)5d(1)-4f(7) intra-ion transition and a prolonged afterglow time been more effectively observed (by decreasing the nanowires' diameters), but also the eu2+ related emissions are shifted to shorter wavelengths. |
WOS关键词 | ONE-DIMENSIONAL NANOSTRUCTURES ; WURTZITE ZNS ; SEMICONDUCTOR NANOWIRES ; THERMAL EVAPORATION ; RAMAN-SCATTERING ; CATALYTIC GROWTH ; LUMINESCENCE ; NANOCRYSTALS ; NANOPARTICLES ; STATES |
WOS研究方向 | Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics |
WOS类目 | Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter |
语种 | 英语 |
出版者 | WILEY-V C H VERLAG GMBH |
WOS记录号 | WOS:000233279500022 |
内容类型 | 期刊论文 |
URI标识 | http://www.corc.org.cn/handle/1471x/2426359 |
专题 | 半导体研究所 |
通讯作者 | Cheng, BC |
作者单位 | Chinese Acad Sci, Inst Semicond, Key Lab Semicond Mat Sci, Beijing 100083, Peoples R China |
推荐引用方式 GB/T 7714 | Cheng, BC,Wang, ZG. Synthesis and optical properties of europium-doped zns: long-lasting phosphorescence from aligned nanowires[J]. Advanced functional materials,2005,15(11):1883-1890. |
APA | Cheng, BC,&Wang, ZG.(2005).Synthesis and optical properties of europium-doped zns: long-lasting phosphorescence from aligned nanowires.Advanced functional materials,15(11),1883-1890. |
MLA | Cheng, BC,et al."Synthesis and optical properties of europium-doped zns: long-lasting phosphorescence from aligned nanowires".Advanced functional materials 15.11(2005):1883-1890. |
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