Electronic Convergence Materials & Device Research Center, Korea Electronics Technology Institute, Gyeonggi-do, 13509, Korea.
Department of Materials Science and Engineering, Korea University, Seoul, 02841, Korea.
Sci Rep. 2017 Jun 9;7(1):3131. doi: 10.1038/s41598-017-02265-3.
Flexible and crystallized indium-tin oxide (ITO) thin films were successfully obtained on plastic polyethylene terephthalate (PET) films with monolayered graphene as a platform. The highly crystalline ITO (c-ITO) was first fabricated on a rigid substrate of graphene on copper foil and it was subsequently transferred onto a PET substrate by a well-established technique. Despite the plasma damage during ITO deposition, the graphene layer effectively acted as a Cu-diffusion barrier. The c-ITO/graphene/PET electrode with the 60-nm-thick ITO exhibited a reasonable sheet resistance of ~45 Ω sq and a transmittance of ~92% at a wavelength of 550 nm. The c-ITO on the monolayered graphene support showed significant enhancement in flexibility compared with the ITO/PET film without graphene because the atomically controlled monolayered graphene acted as a mechanically robust support. The prepared flexible transparent c-ITO/graphene/PET electrode was applied as the anode in a bulk heterojunction polymer solar cell (PSC) to evaluate its performance, which was comparable with that of the commonly used c-ITO/glass electrode. These results represent important progress in the fabrication of flexible transparent electrodes for future optoelectronics applications.
成功地在单层石墨烯平台上于塑料聚酯薄膜（PET）上获得了柔性和结晶的铟锡氧化物（ITO）薄膜。高结晶的 ITO（c-ITO）首先在铜箔上的石墨烯的刚性基底上制造，然后通过成熟的技术将其转移到 PET 基底上。尽管在 ITO 沉积过程中存在等离子体损伤，但石墨烯层有效地起到了 Cu 扩散阻挡层的作用。具有 60nm 厚 ITO 的 c-ITO/石墨烯/PET 电极在 550nm 波长处表现出合理的方阻约为 45Ω/sq 和透光率约为 92%。与没有石墨烯的 ITO/PET 薄膜相比，原子控制的单层石墨烯作为机械坚固的支撑，c-ITO 薄膜在单层石墨烯支撑上显示出显著的柔韧性增强。所制备的柔性透明 c-ITO/石墨烯/PET 电极被用作体异质结聚合物太阳能电池（PSC）的阳极来评估其性能，其性能与常用的 c-ITO/玻璃电极相当。这些结果代表了未来光电子应用中柔性透明电极制造的重要进展。
