Spatial-resolved cathode luminescence study of S-doped ZnO particles for the luminescence of UV, green and orange band emission

Spatial-resolved cathode luminescence study of S-doped ZnO particles for the luminescence of UV, green and orange band emission
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S 掺杂 ZnO 颗粒的空间分辨阴极发光研究,用于紫外、绿光和橙光波段发射

DOI:
10.1016/j.apsusc.2013.06.096
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发表时间:
2013-10
影响因子:
6.7
通讯作者:
Hui Yang
Hui Yang
中科院分区:
材料科学1区
文献类型:
--
作者:
Yongxin Qiu;Baoshun Zhang;Ke Xu;Hui Yang

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采用水热法制备了六方双柱结构的ZnO纳米粒子,研究了其紫外发射和长波长发射、绿色发射(GE)和橙子发射(OE)的关系。未掺杂和硫掺杂的ZnO之间的室温光致发光的比较显示长波长发射的增加,这大概是由于在掺杂的ZnO中的缺陷的增加。单个ZnO颗粒的空间阴极发光(CL)分析表明,GE和OE带之间的竞争行为。ZnO中的长波长发射都与Zn空位有关。如果Zn空位相关的氧留在晶格点,则GE将占主导地位;否则,如果该氧原子离开晶格点以形成间隙原子,则OE将占主导地位。
The hexagonal bi-pillar structures of undoped and sulfur-doped ZnO particles have been synthesized by hydrothermal method to study the relationship between UV and long wavelength emissions, green emission (GE) and orange emission (OE) bands. A room temperature photoluminescence comparison between undoped and sulfur-doped ZnO shows an increase of long wavelength emission, that is presumably due to an increase of defects in doped ZnO. Spatial cathode luminescence (CL) analysis on a single ZnO particle shows a competitive behavior between GE and OE bands. The long wavelength emissions in ZnO are all related to Zn vacancies. GE will dominate if the Zn vacancy-related oxygen stays at lattice point; otherwise OE will dominate if this oxygen atom leaves lattice point to form a interstitial atom.
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