Department of Mechanical Engineering, KAIST, Daejeon, 305-701, Republic of Korea.
Nanotechnology. 2017 May 12;28(19):194002. doi: 10.1088/1361-6528/aa6a44.
To protect brittle layers in organic photovoltaic devices, the mechanical neutral plane strategy can be adopted through placing the brittle functional materials close to the neutral plane where stress and strain are zero during bending. However, previous research has been significantly limited in the location and number of materials to protect through using a single neutral plane. In this study, multiple neutral planes are generated using low elastic modulus adhesives and are controlled through quantitative analyses in order to protect the multiple brittle materials at various locations. Moreover, the protection of multiple brittle layers at various locations under both concave and convex bending directions is demonstrated. Multilayer structures that have soft adhesives are further analyzed using the finite element method analysis in order to propose guidelines for structural design when employing multiple neutral planes.
为了保护有机光伏器件中的脆弱层，可以通过将脆性功能材料放置在弯曲时应力和应变均为零的中性面附近，采用机械中性面策略。然而，以前的研究在使用单个中性面时，受到保护的材料的位置和数量的显著限制。在这项研究中，使用低弹性模量的粘合剂产生多个中性面，并通过定量分析进行控制，以保护各个位置的多个脆性材料。此外，还展示了在凹面和凸面弯曲方向下多个脆性层在不同位置的保护。进一步使用有限元法分析对具有软粘合剂的多层结构进行分析，以便在使用多个中性面时为结构设计提供指导原则。
