Effect of sodium diffusion on the structural and electrical properties of Cu2ZnSnS4 thin films
Effect of sodium diffusion on the structural and electrical properties of Cu2ZnSnS4 thin films
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DOI：
10.1016/j.solmat.2010.12.012
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发表时间：
2011-03
影响因子：
6.9
通讯作者：
Tejas Prabhakar;N. Jampana
中科院分区：
文献类型：
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作者：
Tejas Prabhakar;N. Jampana
Cu2ZnSnS4（CZTS）是一种由丰富可用元素组成的硅矿半导体。它具有1.5eV的带隙和较大的吸收系数。因此，由这种材料制成的薄膜可以用作太阳能电池的吸收层。采用超声喷雾热解法在钠石灰和无钠硼硅酸盐玻璃衬底上沉积了CZTS薄膜。钠在钠石灰玻璃中的扩散对CZTS薄膜的晶粒尺寸、晶体结构和电导率等特性有深远的影响。在沉积过程中，铜离子浓度也会发生变化，当膜中铜缺乏时，载流子浓度会增加。本文介绍了钠扩散和缺铜对提高CZTS薄膜结构和电性能的影响。
Cu2ZnSnS4(CZTS) is a kesterite semiconductor consisting of abundantly available elements. It has a band gap of 1.5eV and a large absorption coefficient. Hence, thin films made of this material can be used as absorber layers of a solar cell. CZTS films were deposited on soda lime and Na free borosilicate glass substrates through Ultrasonic Spray Pyrolysis. The diffusion of sodium from soda lime glass was found to have a profound effect on characteristics like grain size, crystal texture and conductivity of CZTS thin films. Copper ion concentration also varied during the deposition and it was observed that the carrier concentration was enhanced when there was a deficiency of copper in the films. The effect of sodium diffusion and copper deficiency in enhancing the structural and electrical properties of CZTS films are presented in this paper.