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。
A cone-shaped gadolinium doped ceria（Ce0.9Gd0.1O1.95,GDC） electrolyte cylinder with a thin wall was fabricated using slip cast-ing technique.The diameter of the larger open end of the cone-shaped cylinder was 0.85 cm,the length was 1.0 cm,and the thickness of the wall was 0.026 cm after sintering.Both the electrolyte and electrode powders were fabricated by using a glycine-nitrate process.A single solid oxide fuel cell（SOFC） was prepared with the cone-shaped electrolyte,NiO-GDC（70：30 wt.%） anode and Sm0.5Sr0.5CoO3（SSC） cathode.Its electrochemical performance（I-V curve） and electrochemical impedance spectroscopy（EIS） were studied with humidified hydrogen as the fuel and air as the oxidant.The maximum output power density was about 300 ？mW/cm2 at 700 oC.The EIS results showed that the dominant loss of the SOFC was from the ohmic resistance of the electrolyte.
