PREPARATION AND CHARACTERIZATION OF POLY-CRYSTALLINE SILICON THIN FILM

Poly-crystalline silicon thin film has big potential of reducing the cost of solar cells. In this paper the preparation of thin film is introduced, and then the morphology of poly-crystalline thin film, is discussed. On the film we developed poly-crystalline silicon thin film solar cells with efficiency up to 6.05% without anti-reflection coating.

江垭大坝第5号、8号坝段坝面裂缝处理

湖南省江垭大坝第5号、8号坝段原施工期处理的裂缝在较长时期温度、水位变化作用下重新张开,并有继续发展的趋势。经过前期勘探和采取有效的安全监测措施后,运用了化学灌浆和表面防渗处理。表面防渗处理采用SR2纳米塑性止水材料和环氧砂浆嵌缝,PSI-tape裂缝修补带封缝?裂缝灌浆采用了LW水溶性聚氨酯灌浆材料。裂缝处理完后,经压水试验检查和外观检查,200m廊道内混凝土表面干燥,裂缝处未发现渗水现象,完全满足预想要求,达到了处理的目的。