Fabrication of Cu2ZnSnS4 screen printed layers for solar cells
Fabrication of Cu2ZnSnS4 screen printed layers for solar cells
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DOI：
10.1016/j.solmat.2010.06.010
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发表时间：
2010-12
影响因子：
6.9
通讯作者：
Zhihua Zhou;Yanyan Wang;Dong Xu;Yafei Zhang
中科院分区：
文献类型：
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作者：
Zhihua Zhou;Yanyan Wang;Dong Xu;Yafei Zhang
采用丝网印刷技术成功地在柔性聚酰亚胺衬底上制备了cu2znsns4层。采用湿法球磨和烧结法制备了网印膏的主要原料Cu2ZnSnS4微粒。x射线衍射表征结果表明，丝网印刷的Cu2ZnSnS4层与单相Cu2ZnSnS4具有良好的索引性。扫描电镜图像显示，制备的cu2znsns4微粒子直径约为30 ~ 50 nm，长度约为150 ~ 200nm。在25°C时，带隙、片阻、载流子浓度和霍尔迁移率分别为1.49eV、2.42×103Ω、3.81×1018cm−3和12.61cm2V−1s−。为了评估丝网印刷Cu2ZnSnS4层的光响应，进一步制备了具有聚酰亚胺/Mo/Cu2ZnSnS4/CdS/ZnO:Al/Al栅格结构的完整光伏电池。典型光伏电池的短路电流密度为4.76mA/cm2，开路电压为386mV，填充系数为0.27，效率为0.49%，有效面积为0.15cm2。
Cu2ZnSnS4layers have been successfully fabricated on flexible polyimide substrates by screen printing. The microparticles of Cu2ZnSnS4, which is the main raw material for preparing screen printing paste, were prepared by wet ball milling and sintering methods. X-ray diffraction characterization results show the screen printed Cu2ZnSnS4layers were well indexed to single phase Cu2ZnSnS4. Scanning electronic microscopy images show the diameters and lengths of the as-prepared Cu2ZnSnS4microparticles are about 30–50 and 150–200nm, respectively. The bandgap, sheet resistance, carrier concentration, and Hall mobility of the screen printed Cu2ZnSnS4layers were about 1.49eV, 2.42×103Ω, 3.81×1018cm−3, and 12.61cm2V−1s−sat 25°C, respectively. To evaluate the photoresponse of the screen printed Cu2ZnSnS4layers, complete photovoltaic cells with the structure of polyimide/Mo/Cu2ZnSnS4/CdS/ZnO:Al/Al-grid were further fabricated. The short-circuit current density, open-circuit voltage, fill factor, and efficiency of a typical photovoltaic cell with an active area of 0.15cm2were 4.76mA/cm2, 386mV, 0.27, and 0.49%, respectively.