Liu Bo-Tau, Lin Hong-Ru, Lee Rong-Ho, Gorji Nima E, Chou Jung-Chuan
Department of Chemical and Materials Engineering, National Yunlin University of Science and Technology, Yunlin 64002, Taiwan.
Department of Chemical Engineering, National Chung Hsing University, Taichung 40227, Taiwan.
Nanomaterials (Basel). 2021 Apr 10;11(4):974. doi: 10.3390/nano11040974.
Polyhedral oligomeric silsesquioxane (POSS), featuring a hollow-cage or semi-cage structure is a new type of organic-inorganic hybrid nanoparticles. POSS combines the advantages of inorganic components and organic components with a great potential for optoelectronic applications such as in emerging perovskite solar cells. When POSS is well dispersed in the polymer matrix, it can effectively improve the thermal, mechanical, magnetic, acoustic, and surface properties of the polymer. In this study, POSS was spin-coated as an ultra-thin passivation layer over the hole transporting layer of nickel-oxide (NO) in the structure of a perovskite solar cell. The POSS incorporation led to a more hydrophobic and smoother surface for further perovskite deposition, resulting in the increase in the grain size of perovskite. An appropriate POSS passivation layer could effectively reduce the recombination of the electron and hole at grain boundaries and increase the short-circuit current from 18.0 to 20.5 mA·cm. Moreover, the open-circuit voltage of the cell could slightly increase over 1 V.
具有中空笼状或半笼状结构的多面体低聚倍半硅氧烷（POSS）是一种新型的有机-无机杂化纳米粒子。POSS结合了无机成分和有机成分的优点，在新兴的钙钛矿太阳能电池等光电子应用中具有巨大潜力。当POSS在聚合物基体中良好分散时，它可以有效改善聚合物的热、机械、磁、声学和表面性能。在本研究中，POSS被旋涂在钙钛矿太阳能电池结构中氧化镍（NO）空穴传输层上作为超薄钝化层。POSS的引入使得表面更疏水、更光滑，有利于进一步沉积钙钛矿，导致钙钛矿晶粒尺寸增大。适当的POSS钝化层可以有效减少晶界处电子和空穴的复合，并使短路电流从18.0 mA·cm增加到20.5 mA·cm。此外，电池的开路电压可略微增加到1 V以上。
