Improvement of Solar Cell Characteristics Using PbS Quantum Dot Superlattice Prepared by Sedimentation
Improvement of Solar Cell Characteristics Using PbS Quantum Dot Superlattice Prepared by Sedimentation
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DOI：
10.1155/2018/3617687
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发表时间：
2018-11
影响因子：
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通讯作者：
K. Mukai;Y. Ishida
中科院分区：
文献类型：
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作者：
K. Mukai;Y. Ishida
本文报道了沉积法制备的量子点超晶格在硅衬底上的有机太阳能电池的特性。当胶体量子点（QD）在溶剂中沉积在基底上时，它们紧密堆积并在膜中形成多个颗粒。我们发现，PbS量子点晶粒生长成一个大的超晶格时，沉积进行了很长一段时间。使用QD超晶格膜作为吸收层制备太阳能电池。当沉积缓慢时，太阳能电池的短路电流密度与快速沉积的情况相比增加了一倍。基于叠加模型的模拟表明，超晶格的形成过程是负责所观察到的细胞特性的变化。
We report the characteristics of organic solar cells on Si substrates using quantum dot superlattices (QDSLs) prepared by sedimentation. When colloidal quantum dots (QDs) are deposited on a substrate in a solvent, they are closely packed and form multiple grains in a film. We found that the PbS QD grains grew into a large superlattice when the deposition proceeded for a long period of time. A solar cell was fabricated using the QD superlattice film as an absorbing layer. When the deposition was slow, the short-circuit current density of the solar cell doubled compared with that of the rapid deposition case. Simulations based on the superposition model suggest that the superlattice formation process is responsible for the observed change in the cell characteristics.