Catalonia Institute for Energy Research (IREC), Jardí de les Dones de Negre 1, Planta 2, 08930 Sant Adrià del Besós, Barcelona, Spain.
J Am Chem Soc. 2012 Jan 25;134(3):1438-41. doi: 10.1021/ja209688a. Epub 2012 Jan 9.
A procedure for the continuous production of Cu(2)ZnSnS(4) (CZTS) nanoparticles with controlled composition is presented. CZTS nanoparticles were prepared through the reaction of the metals' amino complexes with elemental sulfur in a continuous-flow reactor at moderate temperatures (300-330 °C). High-resolution transmission electron microscopy and X-ray diffraction analysis showed the nanocrystals to have a crystallographic structure compatible with that of the kesterite. Chemical characterization of the materials showed the presence of the four elements in each individual nanocrystal. Composition control was achieved by adjusting the solution flow rate through the reactor and the proper choice of the nominal precursor concentration within the flowing solution. Single-particle analysis revealed a composition distribution within each sample, which was optimized at the highest synthesis temperatures used.
本文介绍了一种连续制备具有可控组成的 Cu(2)ZnSnS(4)（CZTS）纳米粒子的方法。通过在连续流反应器中，在中等温度（300-330°C）下，金属氨基配合物与元素硫反应，制备了 CZTS 纳米粒子。高分辨率透射电子显微镜和 X 射线衍射分析表明，纳米晶体具有与 kesterite 相兼容的晶体结构。对材料的化学特性进行了分析，表明每个纳米晶体中都存在这四种元素。通过调节通过反应器的溶液流速和在流动溶液中适当选择标称前体浓度，可以实现组成控制。单颗粒分析表明，在使用的最高合成温度下，每个样品内都存在组成分布。
