Facile hydrothermal synthesis of hydrotropic Cu2ZnSnS4 nanocrystal quantum dots: band-gap engineering and phonon confinement effect
Facile hydrothermal synthesis of hydrotropic Cu2ZnSnS4 nanocrystal quantum dots: band-gap engineering and phonon confinement effect
复制标题
水热Cu2ZnSnS4纳米晶体量子点的简便水热合成：带隙工程和声子限制效应
DOI：
10.1039/c3ta00357d
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发表时间：
2013-01-01
影响因子：
11.9
通讯作者：
Wong, K. H.
中科院分区：
文献类型：
--
作者：
Liu, W. C.;Guo, B. L.;Wong, K. H.
以简单的Cu（II）、Zn（II）和Sn（II）无机盐和硫脲为原料，以乙二胺和二水混合溶液为前驱体，建立了一种简便的水热法制备超细可控尺寸的富土Cu2ZnSnS4 （CZTS）纳米晶体的方法。x射线衍射、拉曼散射和透射电镜证实，在低至180℃的温度下合成了纯kesterite结构的CZTS纳米晶体。拉曼峰的展宽和吸收边的蓝移归因于纳米晶体内部的量子约束。CZTS纳米晶体的亲水性和可调带隙显示了其在生物标记和量子点太阳能电池中的潜在应用。
We developed a facile hydrothermal method for synthesizing ultrafine size-controllable earth-abundant Cu2ZnSnS4 (CZTS) nanocrystals using simple Cu(II), Zn(II) and Sn(II) inorganic salts and thiourea in a mixed ethylenediamine and di-water solution as precursors. X-ray diffraction, Raman scattering and transmission electron microscopy confirm that pure kesterite structure CZTS nanocrystals have been synthesized at temperatures as low as 180 °C. Broadening of Raman peaks and blue-shift of the absorption edge is attributed to quantum confinement within the nanocrystals. The hydrophilism and tunable band-gap of the CZTS nanocrystals show the potential applications of the nanocrystals for biological labelling and quantum dot based solar cells.