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A simple chemical route for composition graded Cu(In,Ga)S-2 thin film solar cells: multi-stage paste coating

机译:组成渐变Cu(In,Ga)S-2薄膜太阳能电池的简单化学路线:多阶段糊涂

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摘要

In order to realize the modulation of band-gap profile in low-cost and printable CuInxGa(1-x)S(2) thin-film solar cells, a simple chemical route, namely a multi-stage paste coating method, was developed. In particular, with this method, multiple coatings with two precursor solution pastes with different compositions were applied. Elemental analysis techniques confirmed the formation of three different graded Ga distributions (front, back, and front-and-back gradient) throughout the absorber films depending on the coating sequence with two different pastes. The back gradient cell showed the largest power conversion efficiency of 7.29%, which was almost two times larger than those of the non-graded cells.
机译:为了在低成本和可打印的CuInxGa(1-x)S(2)薄膜太阳能电池中实现带隙分布的调制,开发了一种简单的化学途径,即多阶段糊涂法。特别地,利用该方法,施加具有两种具有不同组成的前体溶液糊剂的多个涂层。元素分析技术证实了整个吸收剂膜上会形成三种不同的梯度Ga分布(前,后和前后梯度),具体取决于两种不同糊剂的涂布顺序。反梯度电池的最大功率转换效率为7.29%,几乎是非梯度电池的两倍。

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