Electrically Tunable Solution-Processed Transparent Conductive Thin Films Based on Colloidally Dispersed ITO@Ag Composite Inkopen access
- Authors
- Cha, Yoo Lim; Jo, Jeong-Hye; Kim, Dong-Joo; Kim, Sun Hee
- Issue Date
- Jun-2022
- Publisher
- MDPI
- Keywords
- transparent conductive oxides; silver; Sn-doped In2O3; colloid; spin coating
- Citation
- NANOMATERIALS, v.12, no.12
- Journal Title
- NANOMATERIALS
- Volume
- 12
- Number
- 12
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/85344
- DOI
- 10.3390/nano12122060
- ISSN
- 2079-4991
- Abstract
- Silver (Ag) introduced colloidal Sn-doped In2O3 (ITO) ink for transparent conductive electrodes (TCEs) was prepared to overcome the limitation of colloidally prepared thin film; low density thin film, high resistance. ITO@Ag colloid ink was made by controlling the weight ratio of ITO and Ag nanoparticles through ball-milling and fabricated using spin coating. These films were dried at 220 degrees C and heat-treated at 450-750 degrees C in an air atmosphere to pyrolyze the organic ligand attached to the nanoparticles. All thin films showed high crystallinity. As the thermal treatment temperature increased, films showed a cracked surface, but as the weight percentage of silver increased, a flattened and smooth surface appeared, caused by the metallic silver filling the gap between the nano-particles. This worked as a bridge to allow electrical conduction, which decreases the resistivity over an order of magnitude, from 309 to 0.396, and 0.107 omega center dot cm for the ITO-220 degrees C, ITO-750 degrees C, and ITO@Ag (7.5 wt.%)-750 degrees C, respectively. These films also exhibited >90% optical transparency. Lowered resistivity is caused due to the inclusion of silver, providing a sufficient number of charge carriers. Furthermore, the work function difference between ITO and silver builds an ohmic junction, allowing fluent electrical flow without any barrier.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - ETC > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.