Development of 2DOF Energy harvester

Development of 2DOF Energy harvester
장선준이윤표D.D. JangH.J.JUng
Energy harvest; vibrational energy; 2 Degree of Freedom; modeling; design; Impedance; resonance frequency; PZT; resonance peak; spring
Issue Date
5th World Conference on Structural Control and Monitoring
Silicon solar cells, which have been in development for several decades, offer a clean, zero emission alternative to fossil fuels. Polymer solar cells built from thin films of organic semiconductors have various advantages over silicon based cells, such as lightweight, flexibility, disposability, and low fabrication cost [1]. However, conventional polymer PV cells, whose active layer is sandwiched between a high-work-function transparent indium tin oxide (ITO) anode and a low-work-function metal cathode, have short lifetimes. In order to improve cell stability, an inverted PV cell structure was proposed [2,3]. This structure enhances the stability to a level greater than that of conventional polymer PV cells by reversing the direction of charge flow. This is accomplished using a high work function metal (Ag, Au) as the hole collecting electrode and a metal oxide (TiO2, ZnO) as the electron selective contact, as shown in FIG. 1. Although the inverted cells show greater operational stability than conventional cells, their reliability is not within the acceptable range for real applications. In this study, the origin of instability in inverted polymer PV cells was investigated using HRTEM.
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