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以乙酰丙酮铜醋酸锌氯化亚锡S粉为前驱体!通过热注入法合成制备出了Cu_2ZnSnS_4纳米颗粒(CATS)。此方法是指将低温溶液注入高温溶液,伴随成核与晶体生长过程。本文研究了不同反应温度对纳米颗粒生长的影响。XRD测试结果表明制备的CZTS纳米颗粒为锌黄锡矿结构。透射电镜结果显示所制备的纳米颗粒为六边形状,其尺寸大小约为10 nm。紫外-可见吸收光谱经计算可知,所得纳米晶的禁带宽度约为1.5 eV,接近光伏材料最佳值。
Cu 2 ZnSnS 4 nanoparticles (CATS) were prepared by thermal injection method using copper acetylacetonate zinc stannate as precursor. This method refers to the low-temperature solution into the high-temperature solution, with the nucleation and crystal growth process. In this paper, the effects of different reaction temperature on the growth of nanoparticles were studied. The results of XRD showed that the prepared CZTS nanoparticles were of kyanite structure. TEM results showed that the prepared nanoparticles were hexagonal with the size of about 10 nm. UV-visible absorption spectra calculated shows that the band gap of the obtained nanocrystals is about 1.5 eV, which is close to the best value of photovoltaic materials.