Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 135, Issue 36, Pages 13538-13548Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ja406230f
Keywords
-
Categories
Funding
- Engineering and Physical Sciences Research Council (EPSRC)
- European Commission [246124]
- Engineering and Physical Sciences Research Council [EP/H040218/2, EP/F065884/1, EP/G049653/1] Funding Source: researchfish
- EPSRC [EP/H040218/2, EP/G049653/1, EP/F065884/1] Funding Source: UKRI
Ask authors/readers for more resources
Chemical doping is a powerful method to improve the charge transport and to control the conductivity in organic semiconductors (OSs) for a wide range of electronic devices. We demonstrate protic ionic liquids (PILs) as effective p-dopant in both polymeric and small molecule OSs. In particular, we show that PILs promote single electron oxidation, which increases the hole concentration in the semiconducting film. The illustrated PIL-doping mechanism is compatible with materials processed by solution and is stable in air. We report the use of PIL-doping in hybrid solar cells based on triarylamine hole transporting materials, such as 2,2',7,7'-tetralds(N,N-di-pmethoxyphenyl-amine)-9,9'-spirobifluorene (spiro-OMeTAD). We show improved power conversion efficiency by replacing lithium salts, typical p-dopants for spiro-OMeTAD, with PILs. We use photovoltage-photocurrent decay and photoinduccd absorption spectroscopy to establish that significantly improved device performance is mainly due to reduced charge transport resistance in the hole-transporting layer, as potentiated by PIL-doping.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available