| 초록 |
We developed the packaging process using an ultraviolet (UV)-curable polymer encapsulant to prevent the oxidation of the organic solar cells (OSCs) by oxygen permeation. We investigated the chemical and physical properties of polyurethane acrylates without reactive diluents, PUA with 2-hydroxyethyl methacrylate, and PUA with 2,2,2-trifluoroethyl methacrylate. As the encapsulant, the PUA-HEMA possessed advantageous mechanical, chemical, and provided the most effective oxygen barrier properties. These desirable properties came from the strong intermolecular packing activated by hydrogen bonding between hydroxyl functional groups in the HEMA segment. Thanks to these advantages, PUA-HEMA was adopted as the encapsulant in the packaging process for OSCs. We observed the anti-oxidation property and the resulting photovoltaic performance through various analyses. The PUA-HEMA encapsulant achieves long-term device operation time protecting the corrosion of electrodes in ambient air. |
