PDF(Pubmed)
Abstract：
SU-8 polymers are promising materials for various applications due to their low cost, excellent thermal stability, and outstanding mechanical properties. Cross-linking of SU-8 is a crucial process that determines the properties of the materials. This study investigates the effect of cross-linking of free-standing SU-8 films on optical transmission and PL emission under various curing conditions. Our findings show that an increase in the cross-linking density reduces optical transmission and causes a red shift of the PL emission band peaks. By directly measuring the optical response of the isolated SU-8, we remove any uncertainty due to the substrate\'s presence. Moreover, we show that optical transmission and PL spectroscopy are two non-distractive techniques that can be employed to monitor the curing of the SU-8. This finding enhances our understanding of the cross-linking process in SU-8 and paves the way to further enhance the properties of the SU-8 polymer for various electronics and optoelectronics applications.
摘要：
SU-8聚合物由于其低成本而成为各种应用的有前途的材料，优异的热稳定性，和突出的机械性能。SU-8的交联是决定材料性能的关键过程。这项研究调查了在各种固化条件下，独立SU-8薄膜的交联对光学透射和PL发射的影响。我们的发现表明，交联密度的增加会降低光透射率，并导致PL发射带峰的红移。通过直接测量隔离的SU-8的光学响应,我们消除了由于衬底的存在而导致的任何不确定性。此外，我们表明，光透射和PL光谱是两种非干扰技术，可用于监测SU-8的固化。这一发现增强了我们对SU-8中交联过程的理解,并为进一步增强SU-8聚合物用于各种电子和光电子学应用的性能铺平了道路。
