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Mechanical characterizations of high-quality quantum dot arrays via transfer printing

机译:通过转移印刷对高质量量子点阵列进行机械表征

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In this study, we investigate the mechanical characteristics of transfer-printed quantum dot (QD) arrays. Transfer printing of a spin-coated QD array by elastomers results in changes of the mechanical properties of the QD films since QDs encapsulated by organic aliphatic ligands can be deformed by physical forces such as pressure. We demonstrate the lateral compaction of a QD film due to the Poisson effect of an elastomeric stamp during transfer printing. Interestingly, the spin-coated QDs on a self-assembled monolayer provide more uniform and denser QD arrays than those on glass. Finally, we demonstrate enhanced device performance of the optoelectronic devices using the printed QD films compared to the spin-coated films on glass.
机译:在这项研究中,我们研究了转移印刷量子点(QD)阵列的机械特性。通过弹性体对旋涂的QD阵列进行转移印刷会导致QD膜的机械性能发生变化,因为被有机脂族配体封装的QD可能会因物理力(例如压力)而变形。我们展示了由于QD膜的横向压实,这是由于在转印过程中弹性体印模的泊松效应所致。有趣的是,自组装单层上的旋涂QD所提供的QD阵列比玻璃上的QD阵列更为均匀和密集。最后,我们证明了与印刷在玻璃上的旋涂膜相比,使用印刷QD膜增强了光电器件的器件性能。

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