| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Thelakkat, Mukundan
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (14/14 displayed)
- 2024Controlling crystal orientation in films of conjugated polymers by tuning the surface energy
- 2024Design Principles of Diketopyrrolopyrrole‐Thienopyrrolodione Acceptor<sub>1</sub>–Acceptor<sub>2</sub> Copolymerscitations
- 2021Solid polymer nanocomposite electrolytes with improved interface properties towards lithium metal battery application at room temperaturecitations
- 2021Roadmap on organic-inorganic hybrid perovskite semiconductors and devicescitations
- 2020HOMO–HOMO Electron Transfer: An Elegant Strategy for p‐Type Doping of Polymer Semiconductors toward Thermoelectric Applicationscitations
- 2017Influence of fluorination on the microstructure and performance of diketopyrrolopyrrole‐based polymer solar cellscitations
- 2017Hybrid Photovoltaics – from Fundamentals towards Applicationcitations
- 2017Plasmonic nanomeshes: Their ambivalent role as transparent electrodes in organic solar cells
- 2017Influence of fluorination on the microstructure and performance of diketopyrrolopyrrole-based polymer solar cellscitations
- 2016EDOT-diketopyrrolopyrrole copolymers for polymer solar cellscitations
- 2016Azido-Functionalized Thiophene as a Versatile Building Block to Cross-Link Low-Bandgap Polymerscitations
- 2013Hierarchical orientation of crystallinity by block-copolymer patterning and alignment in an electric fieldcitations
- 2012Semiconductor amphiphilic block copolymers for hybrid donor-acceptor nanocompositescitations
- 2007Local potential distribution of macrophase separated polymer blend domainscitations
Places of action
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article
HOMO–HOMO Electron Transfer: An Elegant Strategy for p‐Type Doping of Polymer Semiconductors toward Thermoelectric Applications
Abstract
Unlike the conventional p‐doping of organic semiconductors (OSCs) using acceptors, here, an efficient doping concept for diketopyrrolopyrrole‐based polymer PDPP[T]\(_{2}\)‐EDOT (OSC‐1) is presented using an oxidized p‐type semiconductor, Spiro‐OMeTAD(TFSI)\(_{2}\) (OSC‐2), exploiting electron transfer from HOMO\(_{OSC-1}\) to HOMO\(_{OSC-2}\). A shift of work function toward the HOMO\(_{OSC-1}\) upon doping is confirmed by ultraviolet photoelectron spectroscopy (UPS). Detailed X‐ray photoelectron spectroscopy (XPS) and UV–vis–NIR absorption studies confirm HOMO\(_{OSC-1}\) to HOMO\(_{OSC-2}\) electron transfer. The reduction products of Spiro‐OMeTAD(TFSI)\(_{2}\) to Spiro‐OMeTAD(TFSI) and Spiro‐OMeTAD is also confirmed and their relative amounts in doped samples is determined. Mott–Schottky analysis shows two orders of magnitude increase in free charge carrier density and one order of magnitude increase in the charge carrier mobility. The conductivity increases considerably by four orders of magnitude to a maximum of 10 S m\(^{-1}\) for a very low doping ratio of 8 mol%. The doped polymer films exhibit high thermal and ambient stability resulting in a maximum power factor of 0.07 µW m\(^{-1}\) K\(^{-2}\) at a Seebeck coefficient of 140 µV K\(^{-1}\) for a very low doping ratio of 4 mol%. Also, the concept of HOMO\(_{OSC-1}\) to HOMO\(_{OSC-2}\) electron transfer is a highly efficient, stable and generic way to p‐dope other conjugated polymers.