| Autor: |
Gonzalez Arellano DL; Department of Polymer Science and Engineering, University of Massachusetts , Amherst, Massachusetts 01003, United States., Lee H; Department of Physics, Kangwon National University , 1 Gangwondaehak-gil, 24341, Republic of Korea., Secor EB; Department of Materials Science and Engineering and Department of Chemistry, Northwestern University , Evanston, Illinois 60208, United States., Burnett EK; Department of Polymer Science and Engineering, University of Massachusetts , Amherst, Massachusetts 01003, United States., Hersam MC; Department of Materials Science and Engineering and Department of Chemistry, Northwestern University , Evanston, Illinois 60208, United States., Watkins JJ; Department of Polymer Science and Engineering, University of Massachusetts , Amherst, Massachusetts 01003, United States., Briseno AL; Department of Polymer Science and Engineering, University of Massachusetts , Amherst, Massachusetts 01003, United States. |
| Abstrakt: |
We demonstrate conductive templating interlayers of graphene ink, integrating the electronic and chemical properties of graphene in a solution-based process relevant for scalable manufacturing. Thin films of graphene ink are coated onto ITO, following thermal annealing, to form a percolating network used as interlayer. We employ a benchmark n-type semiconductor, C 60 , to study the interface of the active layer/interlayer. On bare ITO, C 60 molecules form films of homogeneously distributed grains; with a graphene interlayer, a preferential orientation of C 60 molecules is observed in the individual graphene plates. This leads to crystal growth favoring enhanced charge transport. We fabricate devices to characterize the electron injection and the effect of graphene on the device performance. We observe a significant increase in the current density with the interlayer. Current densities as high as ∼1 mA/cm 2 and ∼70 mA/cm 2 are realized for C 60 deposited with the substrate at 25 °C and 150 °C, respectively. |
