Tunable photoluminescence wavelength of chalcopyrite CuInS2-based semiconductor nanocrystals synthesized in a colloidal system
Tunable photoluminescence wavelength of chalcopyrite CuInS2-based semiconductor nanocrystals synthesized in a colloidal system
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DOI：
10.1021/cm0518022
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发表时间：
2006-07-11
影响因子：
8.6
通讯作者：
Maeda, Hideaki
中科院分区：
文献类型：
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作者：
Nakamura, Hiroyuki;Kato, Wataru;Maeda, Hideaki
黄铜矿型CuInS 2基合金化荧光纳米晶体（NC），其中不包含受管制的重金属离子，通过加热有机金属溶液，以证明光学性质的可调谐性。Zn的引入增强了CuInS 2体系的光致发光（PL）强度。所得颗粒为3-6 nm;它们随实验条件而变化，并且是离散的和胶体稳定的。Zn-Cu-In-S（ZCIS）纳米碳的带隙能量和发光波长随Zn含量和颗粒尺寸而变化。通过改变带隙能量，可以在570-800 nm范围内控制其发光。此外，用镓取代铟显示出将带隙能量控制为接近3.1eV，500 nm的PL波长。此外，ZnS涂层的这种发光材料可以大约增加一倍的PL强度。最后，用巯基十一烷酸进行表面处理，将亲水性ZCIS NC分散到水中。
Chalcopyrite-type CuInS2-based alloyed fluorescent nanocrystals (NCs), which contain no regulated heavy metal ions, were synthesized by heating an organometallic solution to demonstrate optical property tunability. Introduction of Zn into the CuInS2 system enhanced their photoluminescence (PL) intensity. The resultant particles were 3-6 nm; they varied with experimental conditions and were discrete and colloidally stable. The band-gap energy and PL wavelength of Zn-Cu-In-S (ZCIS) NCs varied with Zn content and particle size. Their PL was controllable within 570-800 nm by altering the band-gap energy. Furthermore, indium substitution with gallium was shown to control band-gap energy toward similar to 3.1 eV, 500 nm of PL wavelength. In addition, ZnS coating of this nanocrystal can approximately double the PL strength. Finally, surface treatment with mercaptoundecanoic acid dispersed hydrophilic ZCIS NCs into water.