GREEN LUMINESCENCE FROM COPPER-DOPED ZINC-SULFIDE QUANTUM PARTICLES
GREEN LUMINESCENCE FROM COPPER-DOPED ZINC-SULFIDE QUANTUM PARTICLES
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DOI：
10.1063/1.114298
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发表时间：
1995-10-30
影响因子：
4
通讯作者：
KULKARNI, SK
中科院分区：
文献类型：
--
作者：
KHOSRAVI, AA;KUNDU, M;KULKARNI, SK
采用化学方法合成了硫化锌量子颗粒的自支撑粉末。X射线衍射分析表明，颗粒的直径近似于21+/-2埃，这小于硫化锌的玻尔激子直径。UV吸收显示出中心在类似于300 nm处的激子峰，对应于4.1+/-0.1 eV的能隙。这些颗粒在424 nm附近显示出发光带。量子粒子可以在合成过程中掺杂铜，而不会改变UV吸收或X射线衍射图案。但是，掺杂使发光位移到可见光区的480 nm，绿色波长。(C)1995年美国物理学会。
Free-standing powder of zinc sulphide quantum particles has been synthesized using a chemical route. X-ray diffraction analysis shows that the diameter of the particles is similar to 21+/-2 Angstrom which is smaller than the Bohr exciton diameter for zinc sulphide. UV absorption shows an excitonic peak centered at similar to 300 nm corresponding to an energy gap of 4.1+/-0.1 eV. These particles show a luminescence band at similar to 424 nm. The quantum particles could be doped with copper during synthesis without altering the UV absorption or x-ray diffraction pattern. However, doping shifted the luminescence to 480 nm, green wavelength in the visible region. (C) 1995 American Institute of Physics.