Novel two-step synthesis of NiS nanoplatelet arrays as efficient counter electrodes for dye-sensitized solar cells
Novel two-step synthesis of NiS nanoplatelet arrays as efficient counter electrodes for dye-sensitized solar cells
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DOI：
10.1016/j.jpowsour.2013.05.052
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发表时间：
2013-11
影响因子：
9.2
通讯作者：
Wei Zhao;Xiaolong Zhu;H. Bi;Houlei Cui;Shengrui Sun;Fuqiang Huang
中科院分区：
文献类型：
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作者：
Wei Zhao;Xiaolong Zhu;H. Bi;Houlei Cui;Shengrui Sun;Fuqiang Huang
无铂(无铂)对电极可以降低染料敏化太阳能电池(DSC)的成本。在这项研究中，提出了一种构建无铂纳米结构的一般策略，即直接生长电催化活性纳米结构(金属硫化物等)。通过低温溶液路线在导电基板上。作为一种实现方法，通过两步溶液法成功地制备了由相互连接的纳米小片组成的硫化镍(NiS)纳米阵列薄膜。以水热法在FTO衬底上沉积的Ni(OH)2纳米片状阵列为前驱体，在硫脲水溶液中硫化制备了NiS纳米阵列薄膜。当作为无铂CE应用于DSCS时，最大功率转换效率达到7.10%，与铂CE(7.35%)相当。
Platinum-free (Pt-free) counter electrodes (CEs) can reduce the cost of dye-sensitized solar cells (DSCs). In this study, a general strategy is proposed to construct Pt-free CEs, namely direct growth of electrocatalytic active nanostructures (metal sulfide,etc.) on conductive substrates via low temperature solution routes. As an implementation, nickel sulfide (NiS) nanoarray film composed of interconnected nanoplatelets is successfully fabricated by a two-step solution route. The as-grown NiS nanoarray film follows the sulfurization process in a thiourea aqueous solution from the precursor of hydrothermally deposited Ni(OH)2nanoplatelet arrays on FTO substrates. When applied as a Pt-free CE in DSCs, a maximum power conversion efficiency of 7.10% is achieved, comparable to that of Pt CE (7.35%).