Effective work function modulation of graphene/carbon nanotube composite films as transparent cathodes for organic optoelectronics.
basic_science · Level V
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- Record sourced from PubMed, PMID 21711013.
- Also identified by DOI 10.1021/nn201253w.
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Abstract
In this study, we found that the work functions (Φ(w)) of solution-processable, functional graphene/carbon nanotube-based transparent conductors were readily manipulated, varying between 5.1 and 3.4 eV, depending on the nature of the doping alkali carbonate salt. We used the graphene-based electrodes possessing lower values of Φ(w) as cathodes in inverted-architecture polymer photovoltaic devices to effectively collect electrons, giving rise to an optimal power conversion efficiency of 1.27%.