Dedoping induced interfacial instability of poly(ethylene imine)s treated PEDOT:PSS as low-work-function electrodes
Transparent organic electrodes printed from high-conductivity PEDOT: PSS have become essential for upscaling all-carbon based, low-cost optoelectronic devices. In the printing process, low-work-function PEDOT: PSS electrodes (cathode) are achieved by coating an ultra-thin, non-conjugated polyelectro...
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| Hauptverfasser: | , , , , , , , , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
20 Nov 2019
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| In: |
Journal of materials chemistry. C, Materials for optical and electronic devices
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| ISSN: | 2050-7534 |
| DOI: | 10.1039/C9TC05018C |
| Online-Zugang: | Verlag, Volltext: https://doi.org/10.1039/C9TC05018C Verlag, Volltext: https://pubs.rsc.org/en/content/articlelanding/2019/tc/c9tc05018c 
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| Verfasserangaben: | Wanzhu Cai, Thomas Österberg, Mohammad Javad Jafari, Chiara Musumeci, Chuanfei Wang, Guangzheng Zuo, Xiaolong Yi, Xuhao Luo, Jim Johansson, Martijn Kemerink, Liangqi Ouyang, Thomas Ederth, and Olle Inganäs |
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| 245 | 1 | 0 | |a Dedoping induced interfacial instability of poly(ethylene imine)s treated PEDOT:PSS as low-work-function electrodes |c Wanzhu Cai, Thomas Österberg, Mohammad Javad Jafari, Chiara Musumeci, Chuanfei Wang, Guangzheng Zuo, Xiaolong Yi, Xuhao Luo, Jim Johansson, Martijn Kemerink, Liangqi Ouyang, Thomas Ederth, and Olle Inganäs |
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| 520 | |a Transparent organic electrodes printed from high-conductivity PEDOT: PSS have become essential for upscaling all-carbon based, low-cost optoelectronic devices. In the printing process, low-work-function PEDOT: PSS electrodes (cathode) are achieved by coating an ultra-thin, non-conjugated polyelectrolyte that is rich in amine groups, such as poly (ethylene imine) (PEI) or its ethoxylated derivative (PEIE), onto PEDOT:PSS surfaces. Here we mapped the physical and chemical processes that occur at the interface between thin PEIx (indicating either PEI or PEIE) and PEDOT:PSS during printing. We identify that there is a dedoping effect of PEDOT induced by the PEIx. Using infrared spectroscopy, we found that the amine-rich PEIx can form chemical bonds with the dopant, PSS. At lower PSS concentration, PEIx also shows an electron-transfer effect to the charged PEDOT chain. These interface reactions lock the surface morphology of PEDOT: PSS, preventing the redistribution of PSS, and reduce the work function. Subsequent exposure to oxygen during the device fabrication process, on the other hand, can result in redoping of the low-work-function PEDOT: PSS interface, causing problems for printing reproducible devices at ambient conditions. | ||
| 700 | 1 | |a Österberg, Thomas |e VerfasserIn |4 aut | |
| 700 | 1 | |a Jafari, Mohammad Javad |e VerfasserIn |4 aut | |
| 700 | 1 | |a Musumeci, Chiara |e VerfasserIn |4 aut | |
| 700 | 1 | |a Wang, Chuanfei |e VerfasserIn |4 aut | |
| 700 | 1 | |a Zuo, Guangzheng |e VerfasserIn |4 aut | |
| 700 | 1 | |a Yi, Xiaolong |e VerfasserIn |4 aut | |
| 700 | 1 | |a Luo, Xuhao |e VerfasserIn |4 aut | |
| 700 | 1 | |a Johansson, Jim |e VerfasserIn |4 aut | |
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| 700 | 1 | |a Ouyang, Liangqi |e VerfasserIn |4 aut | |
| 700 | 1 | |a Ederth, Thomas |e VerfasserIn |4 aut | |
| 700 | 1 | |a Inganäs, Olle |e VerfasserIn |4 aut | |
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