| 초록 |
Polyimides (PIs) have good thermal stability, a high decomposition temperature, mechanical toughness, pliability, solvent resistance, and outstanding electrical properties. However, they are generally pale yellow- to brown-colored due to the intra- and inter-molecular charge transfer (CT) of the polyimide backbones. In addition, ordered structures at the nanometer level also deteriorate the transparency in the UV/VIS region due to Rayleigh scattering. In this regard, many colorless and transparent PIs have been developed for applications as optical materials in the field of organic light-emitting devices (OLEDs), micro optical components and waveguide circuits. In this presentation, we will touch on a few examples of colorless and transparent PIs that have been studied in this laboratory for years, including alicyclic PIs, fluorinated PIs, and chlorinated PIs along with their electro-optic applications such as OLEDs and flexible substrates. |
