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Dedoping-induced in...
Dedoping-induced interfacial instability of poly(ethylene imine)s-treated PEDOT:PSS as a low-work-function electrode
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- Wanzhu, Cai (author)
- Linköpings universitet,Biomolekylär och Organisk Elektronik,Tekniska fakulteten,Jinan Univ, Peoples R China
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- Österberg, Thomas (author)
- Linköpings universitet,Biomolekylär och Organisk Elektronik,Tekniska fakulteten
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- Jafari, Mohammad Javad (author)
- Linköpings universitet,Molekylär fysik,Tekniska fakulteten
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- Musumeci, Chiara (author)
- Linköpings universitet,Laboratoriet för organisk elektronik,Tekniska fakulteten
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- Wang, Chuan Fei (author)
- Linköpings universitet,Laboratoriet för organisk elektronik,Tekniska fakulteten
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- Zuo, Guangzheng (author)
- Linköpings universitet,Komplexa material och system,Tekniska fakulteten
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- Yin, Xiaolong (author)
- Jinan Univ, Peoples R China
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- Luo, Xuhao (author)
- Jinan Univ, Peoples R China
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- Johansson, Jim (author)
- Linköpings universitet,Biomolekylär och Organisk Elektronik,Tekniska fakulteten
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- Kemerink, Martijn (author)
- Linköpings universitet,Biomolekylär och Organisk Elektronik,Tekniska fakulteten
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- Ouyang, Liangqi (author)
- Linköpings universitet,Biomolekylär och Organisk Elektronik,Tekniska fakulteten
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- Ederth, Thomas (author)
- Linköpings universitet,Molekylär fysik,Tekniska fakulteten
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- Inganäs, Olle (author)
- Linköpings universitet,Biomolekylär och Organisk Elektronik,Tekniska fakulteten
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(creator_code:org_t)
- 2020
- 2020
- English.
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In: Journal of Materials Chemistry C. - : ROYAL SOC CHEMISTRY. - 2050-7526 .- 2050-7534. ; 8:1, s. 328-336
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https://pubs.rsc.org...
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Abstract
Subject headings
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- 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 under ambient conditions.
Subject headings
- NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Wanzhu, Cai
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Österberg, Thoma ...
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Jafari, Mohammad ...
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Musumeci, Chiara
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Wang, Chuan Fei
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Zuo, Guangzheng
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show more...
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Yin, Xiaolong
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Luo, Xuhao
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Johansson, Jim
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Kemerink, Martij ...
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Ouyang, Liangqi
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Ederth, Thomas
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Inganäs, Olle
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- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Chemical Science ...
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and Materials Chemis ...
- Articles in the publication
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Journal of Mater ...
- By the university
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Linköping University