Facile synthesis of photoluminescent ZnS and ZnSe nanopowders.
Facile synthesis of photoluminescent ZnS and ZnSe nanopowders.
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DOI：
10.1021/la800921a
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发表时间：
2008-08
期刊：
影响因子：
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通讯作者：
S. Pol;V. Pol;J. Calderon‐Moreno;S. Cheylan;A. Gedanken
中科院分区：
文献类型：
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作者：
S. Pol;V. Pol;J. Calderon‐Moreno;S. Cheylan;A. Gedanken
Zn 和 S 或 Se 元素在封闭反应器中、在惰性气氛中、在自生压力下、在 650 摄氏度/60 分钟下进行固态热一锅高效化学反应，产生发光的 ZnS 和 ZnSe 半导体纳米粉末 (NP)。扫描和透射电子显微镜测量证实了所形成的 ZnS 和 ZnSe 纳米颗粒的尺寸和形状。 UV-vis 和 TEM 测量证实了 ZnS 和 ZnSe NP 的宽尺寸分布。 XRD 和 HR-TEM 测量揭示了 ZnS 的结晶纤锌矿相和 ZnSe NP 的面心立方相。获得的拉曼散射带也支持纯 ZnS 和 ZnSe 相的形成。在室温下，测量到 ZnS 具有以约 525 nm 为中心的强可见绿色发射，而 ZnSe NP 则显示出从 550 nm 延伸至 760 nm 的宽红色发射带。假定的反应机理是基于反应物（Zn、S 和 Se）在惰性气氛中自生压力下的低熔点和沸点。
The solid state thermal, one pot, efficient chemical reaction between Zn and S or Se elements in a closed reactor at 650 degrees C/60 min under their autogenic pressure in an inert atmosphere yielded luminescent ZnS and ZnSe semiconducting nanopowders (NPs). Scanning and Transmission electron microscopy measurements confirmed the size and shape of the as formed ZnS and ZnSe NPs. The wide size distributions of ZnS and ZnSe NPs are confirmed by UV-vis and TEM measurements. The crystalline wurtzite phase of ZnS and face centered cubic phase of ZnSe NPs is revealed from XRD and HR-TEM measurements. The obtained Raman scattering bands also supports the formation of pure ZnS and ZnSe phases. At room temperature, a strong visible green emission centered at approximately 525 nm is measured for ZnS, while ZnSe NPs showed a broad red emission band extending from 550 to 760 nm. The putative reaction mechanism is based on the low melting and boiling points of reactants (Zn, S and Se) under their autogenic pressure in an inert atmosphere.