溶剂的溶解度对CZTS颗粒性能影响的研究  

Effect of Solubility Parameter of Alcohols Solvents on Performance of Cu_2ZnSnS_4 Particles

作　　者：蒋诗旭 周超[2] 张天财[2] 高延敏[1] 

机构地区：[1]江苏科技大学先进焊接技术省级重点实验室,镇江212003 [2]上海船舶工艺研究所,上海200032

出　　处：《材料研究学报》2016年第11期861-867,共7页Chinese Journal of Materials Research

摘　　要：通过溶剂热法,以含有PVP的醇类作溶剂,以CuCl_2·2H_2O、Zn(Ac)_2·2H_2O、SnCl_4·5H_2O作金属源,硫脲作硫源,在一定条件下反应,通过XRD、Raman、SEM、EDS、TEM、UV-Vis以及电化学分析系统研究醇类溶剂溶解度对CZTS颗粒的物相、结构、形貌以及光电性能的影响。结果表明:所选溶剂溶解度不同,对得到的CZTS颗粒的结晶性、形貌、原子比以及光电性能均有相应的影响;当选择溶解度为32.1的乙二醇作溶剂时,合成的颗粒结晶性较好,颗粒形貌为表面嵌有薄片的微球,颗粒表面缺陷形态为贫铜富锌结构,光学带隙为1.47 e V,与太阳能电池所需的最佳带隙接近,薄膜电阻率为45.86Ω·m。Cu2ZnSnS4 （CZTS） particles were synthesized by a facile solvothermal method in polyvinyi-pyrrolidone （PVP） containing alcohols solvent, with CuCl2·2H2O, Zn（Ac）2.2H2O and SnCl4·5H2O as metal precursor, and thiourea as sulfur source, respectively. The effect of the variation of solubility parameter of alcohols solvents on crystal structure, composition, morphology and absorption spectra of the synthe-sized CZTS particles were studied by X-ray diffraction （XRD）, scanning electron microscopy （SEM）, Raman spectroscopy, transmission electron microscopy （TEM） with energy dispersive X-ray spectroscopy （EDS）, UV-Vis spectroscopy and electrochemical analyzer. The results reveal that the solubility parameter of alcohols solvent has a certain influence on the crystallization, morphology, atomic ratios and pho-toelectric properties of the as-synthesized CZTS particles. The optimum alcohols solvent is ethylene glycol.The crystallization of CZTS particles synthesized under the above condition is pure and com- plete, and the CZTS particles with flaky facets are uniform and mono-dispersed. The atomic ratio of ele-ments for CZ.TS particles is close to stoichiometric coefficient and the band gap of the products is about 1.47 eV, which is close to the optimum value for solar photoelectric conversion. The resistivity of CZTS is 45.86Ω·m.

关 键 词：材料合成与加工工艺 溶剂热法 溶解度 醇类溶剂 CZTS 

分 类 号：O613[理学—无机化学]