Synthesis of Cu2ZnSnS4 Thin Films by a Precursor Solution Paste for Thin Film Solar Cell Applications
Synthesis of Cu2ZnSnS4 Thin Films by a Precursor Solution Paste for Thin Film Solar Cell Applications
复制标题
DOI：
10.1021/am401210w
复制
发表时间：
2013-05-22
影响因子：
9.5
通讯作者：
Min, Byoung Koun
中科院分区：
文献类型：
--
作者：
Cho, Jin Woo;Ismail, Agus;Min, Byoung Koun
Cu_2ZnSnS_4（CZTS）是一种非常有前途的半导体材料，由于其元素丰富且价格低廉，可用作薄膜太阳能电池的吸收层。此外，低成本的溶液方法适用于制备CZTS吸收膜，当该膜用于生产薄膜太阳能电池时，其降低了成本。为了制备溶液处理的CZTS薄膜，使用一个容易扩展和相对安全的方法，我们建议了一个前体溶液膏涂方法与两步加热过程（氧化和硫化）。观察到合成的CZTS膜由尺寸类似于300 nm的晶粒组成，显示出具有一些孔和空隙的整体密集堆积的形态。将该膜作为吸收层的太阳能电池装置显示出3.02%的最高效率，开路电压为556 mV，短路电流密度为13.5mA/cm（2），填充因子为40.3%。我们还注意到，镉部分的存在和不均匀的锌分布在CZTS膜，这可能是由CZTS膜中的孔隙和空隙的存在下触发的。
Cu2ZnSnS4 (CZTS) is a very promising semiconductor material when used for the absorber layer of thin film solar cells because it consists of only abundant and inexpensive elements. In addition, a low-cost solution process is applicable to the preparation of CZTS absorber films, which reduces the cost when this film is used for the production of thin film solar cells. To fabricate solution-processed CZTS thin film using an easily scalable and relatively safe method, we suggest a precursor solution paste coating method with a two-step heating process (oxidation and sulfurization). The synthesized CZTS film was observed to be composed of grains of a size of similar to 300 nm, showing an overall densely packed morphology with some pores and voids. A solar cell device with this film as an absorber layer showed the highest efficiency of 3.02% with an open circuit voltage of 556 mV, a short current density of 13.5 mA/cm(2), and a fill factor of 40.3%. We also noted the existence of Cd moieties and an inhomogeneous Zn distribution in the CZTS film, which may have been triggered by the presence of pores and voids in the CZTS film.