Lithium salts as “redox active” p-type dopants for organic semiconductors and their impact in solid-state dye-sensitized solar cells
University of Oxford · Institute of Polymers, Composites and Biomaterials · +2 more institutions
Abstract
Lithium salts have been shown to dramatically increase the conductivity in a broad range of polymeric and small molecule organic semiconductors (OSs). Here we demonstrate and identify the mechanism by which Li+ p-dopes OSs in the presence of oxygen. After we established the lithium doping mechanism, we re-evaluate the role of lithium bis(trifluoromethylsulfonyl)-imide (Li-TFSI) in 2,2′,7,7′-tetrakis(N,N-di-p-methoxyphenyl-amine)9,9′-Spirobifluorene (Spiro-OMeTAD) based solid-state dye-sensitized solar cells (ss-DSSCs). The doping mechanism consumes Li+ during the device operation, which poses a problem, since the lithium salt is required at the dye-sensitized heterojunction to enhance charge generation. This…
Citation impact
- FWCI
- 25.21
- Percentile
- 100%
- References
- 76
Authors
11- AAAntonio Abate
University of Oxford
- TLTomas Leijtens
University of Oxford
- SPSandeep Pathak
University of Oxford
- JTJoël Teuscher
University of Oxford
- RARoberto Avolio
Institute of Polymers, Composites and Biomaterials, National Research Council, The Abdus Salam International Centre for Theoretical Physics (ICTP)
Topics & keywords
- Lithium (medication)
- Dopant
- Doping
- Redox
- Imide
- Solid-state
- Materials science
- Salt (chemistry)