College of Medical Laboratory, Dalian Medical University , Dalian 116044, P. R. China.
School of Engineering, RMIT University , Carlton, Victoria 3053, Australia.
ACS Appl Mater Interfaces. 2017 May 31;9(21):18046-18053. doi: 10.1021/acsami.7b03117. Epub 2017 May 17.
In this research, we reported the synthesis of quaternary CuInSnSe nanoparticles with uniform size distribution and morphology for the first time through delicate controls over the chemical reaction kinetics. On the basis of the preparation strategy of CuInSnSe nanoparticles, Pt-CuInSnSe and Au-CuInSnSe heteronanostructures were designed and yielded using a simple and efficient seed growth method. These two heteronanostructures remained monodispersed without presence of any CuInSnSe nanocrystal impurities. To explore their application potentials for dye-sensitized solar cells, counter electrodes consisting of individual CuInSnSe, Pt-CuInSnSe, or Au-CuInSnSe constituents were fabricated. Current density-voltage (J-V) characteristics evaluation reveals that CuInSnSe nanoparticles, Pt-CuInSnSe and Au-CuInSnSe heterostructured nanoparticles display a comparative power conversion efficiency (PCE) of 5.8%, 7.6%, and 6.5% to that of a Pt-based counter electrode (7.9%), respectively. As such, we believe that the reported preparation strategy could provide new insights to the design and manufacture of counter electrode materials with controlled structure, morphology, and optimized power conversion efficiency for dye-sensitized solar cells.
在这项研究中，我们首次通过精细控制化学反应动力学，成功合成了具有均匀尺寸分布和形态的四元 CuInSnSe 纳米粒子。在此基础上，我们采用一种简单高效的种子生长方法，设计并制备了 Pt-CuInSnSe 和 Au-CuInSnSe 异质纳米结构。这两种异质纳米结构保持单分散性，没有任何 CuInSnSe 纳米晶杂质。为了探索它们在染料敏化太阳能电池中的应用潜力，我们制备了由单个 CuInSnSe、Pt-CuInSnSe 或 Au-CuInSnSe 组成的对电极。电流密度-电压（J-V）特性评估表明，CuInSnSe 纳米粒子、Pt-CuInSnSe 和 Au-CuInSnSe 异质结构纳米粒子的功率转换效率（PCE）分别为 5.8%、7.6%和 6.5%，与基于 Pt 的对电极（7.9%）相当。因此，我们相信，所报道的制备策略为设计和制造具有可控结构、形态和优化功率转换效率的染料敏化太阳能电池对电极材料提供了新的思路。
