论文部分内容阅读
采用简化水热法合成具有锌黄锡矿结构的Cu2Zn Sn S4(CZTS)纳米晶,研究了反应时间对纳米晶性能的影响。采用刷涂法制备CZTS薄膜,并构建三电极电池结构。在液态电解液体系中对CZTS薄膜的光电特性进行测试。结果表明:CZTS纳米晶粒径随反应时间的增加而增大,不同的反应时间对其杂质成分和化学组成有显著影响,从而影响了纳米晶的禁带宽度;经过9 h的水热反应所得到的CZTS纳米晶的直接禁带宽度大约为1.5 e V,相应的薄膜具有显著的光伏性能,可作为光吸收层和工作电极应用于薄膜太阳能电池当中。
Cu2Zn Sn S4 (CZTS) nanocrystals with a kyanite structure were synthesized by a simplified hydrothermal method. The effects of reaction time on the nanocrystalline properties were investigated. CZTS films were prepared by brush coating and a three-electrode cell structure was constructed. The photoelectric properties of CZTS films were tested in a liquid electrolyte system. The results show that the diameter of nanocrystalline CZTS increases with the increase of reaction time, and the reaction time has a significant effect on the impurity composition and chemical composition of nanocrystalline CZTS, which affects the bandgap of nanocrystals. After 9 h of hydrothermal reaction The resulting CZTS nanocrystals have a direct bandgap of about 1.5 eV and the corresponding thin films have significant photovoltaic properties that can be used as thin-film solar cells for light-absorbing and working electrodes.