The effect of solvent treatment on the buried PEDOT:PSS layer |
| |
| Affiliation: | 1. Research Center for New Generation Photovoltaics, National Central University, Taoyuan 32001, Taiwan, ROC;2. Deaprtment of Optics and Photonics, National Central University, Taoyuan 32001, Taiwan, ROC;3. Institute of Chemistry, Academia Sinica, Taipei 11529, Taiwan, ROC;4. Material and Chemical Research Laboratories, Industrial Technology Research Institute, Hsinchu 31040, Taiwan, ROC;5. Department of Electro-Optical Engineering, National Taipei University of Technology, Taipei 10608, Taiwan, ROC;6. Department of Applied Chemistry, National Chi Nan University, Nantou 545, Taiwan, ROC;7. Department of Chemistry, National Central University, Taoyuan 32001, Taiwan, ROC;1. Department of Display Engineering, Pukyong National University, Busan, 608-737, Republic of Korea;2. OLED Research Center, Electronics and Telecommunications Research Institute (ETRI), Daejeon, 305-700, Republic of Korea;3. Department of Materials Science and Engineering, Yonsei University, Seoul, 120-749, Republic of Korea;4. Center for Nano-Photonics Convergence Technology, Korea Institute of Industrial Technology, Gwangju, 500-480, Republic of Korea |
| |
| Abstract: | Solvent treatment has been widely used to improve the device performance of both Organic Light Emitting Diodes (OLEDs) and Polymer Solar Cells (PSCs). One of the proposed mechanisms is the modification of the buried PEDOT:PSS layer underneath the organic active layer by the permeating solvent. By measuring the lateral electric conductivity of the PEDOT:PSS layer, the 3 orders of magnitude's enhancement on the conductivity after solvent treatment confirms that the solvent permeates through the top organic active layer and modifies the PEDOT:PSS layer. Using a “peel-off” method, the buried PEDOT:PSS layer is fully exposed and studied by UV–vis spectra, XPS spectra, and c-AFM images. The data suggest that the permeating solvent dissolves PSS, changes PEDOT:PSS′ core-shell structure into a linear/coiled structure, and moves PSS from the bulk to the surface. As a result, PEDOT becomes more continuous in the bulk. The continuous conducting PEDOT-rich domains create percolating pathways for the current which significantly improve electric conductivity. |
| |
| Keywords: | Solvent treatment PEDOT:PSS OLED Polymer solar cells Morphology |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
