反应时间对水热法合成Cu_2ZnSnS_4纳米晶性能的影响（英文）  

Effects of Reaction Time on Properties of Cu_2ZnSnS_4 Nanocrystals Synthesized by Hydrothermal Method

作　　者：马帅[1] 曹磊[1] 

机构地区：[1]青岛科技大学材料科学与工程学院,山东青岛266042

出　　处：《硅酸盐学报》2015年第2期195-200,共6页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金(51172113);中国国际科学技术合作项目(2014DFA60150);青岛市博士后应用研究项目资助

摘　　要：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 kesterite structure were synthesized by a simplified hydrothermal method. The influence of reaction time on the properties of CZTS was investigated. The CZTS films were prepared by using the brush-coating technique. An ionic liquid measurement system with three-electrode device structure was built up. The photoelectric properties of CZTS film was characterized in liquid electrolyte. The results show that the nanocrystal size increases with increment of reaction time, which meanwhile significantly impacts on impurities, the chemical composition, and thus the energy band-gap of CZTS nanocrystals. With direct energy band-gap about 1.5 e V, the optimized CZTS films with 9 h hydrothermal reaction time appear obvious photovoltaic behavior, which could be potentially applied as light absorber and active layer in thin-film solar cells.

关 键 词：铜锌锡硫纳米晶 锌黄锡矿 水热法 刷涂 光伏 

分 类 号：TB383.1[一般工业技术—材料科学与工程]