采用CuIn0.7Ga0.aSe2、In0.7Ga0.3Se和CuSe为原料,一步热压烧结法制备CIGS靶材.通过阿基米德法、XRD、Raman、SEM和EDS等测试方法研究了CuSe液相辅助烧结对靶材的相对密度、物相组成、结构、形貌以及成份的影响.结果表明,加入CuSe在高温下产生液相能显著促进烧结,比不加入CuSe的体系的烧结温度下降了50℃.当烧结温度为575℃时,获得的靶材相对密度为96.18%,物相单一纯净,微观结构致密,晶粒发育良好.以摩尔比为Cu∶In∶Ga∶Se=23.0∶18.2∶6.5∶52.3的靶材,通过溅射-热处理法制备CIGS薄膜,并完成AZO/ZnO/CdS/CIGS/Mo单电池的组装(0.25 cm2),获得了9.6%的光电转换效率.
参考文献
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