title: Ambient method for the production of an ionically gated carbon nanotube common cathode in tandem organic solar cells.
abstract: A method of fabricating organic photovoltaic (OPV) tandems that requires no vacuum processing is presented. These devices are comprised of two solution-processed polymeric cells connected in parallel by a transparent carbon nanotubes (CNT) interlayer. This structure includes improvements in fabrication techniques for tandem OPV devices. First the need for ambient-processed cathodes is considered. The CNT anode in the tandem device is tuned via ionic gating to become a common cathode. Ionic gating employs electric double layer charging to lower the work function of the CNT electrode. Secondly, the difficulty of sequentially stacking tandem layers by solution-processing is addressed. The devices are fabricated via solution and dry-lamination in ambient conditions with parallel processing steps. The method of fabricating the individual polymeric cells, the steps needed to laminate them together with a common CNT cathode, and then provide some representative results are described. These results demonstrate ionic gating of the CNT electrode to create a common cathode and addition of current and efficiency as a result of the lamination procedure.
authors.affiliation: Physics Department, The University of Texas at Dallas; The NanoTech Institute, The University of Texas at Dallas.
authors.forename: Alexander B
authors.initials: AB
authors.lastname: Cook
authors.affiliation: The NanoTech Institute, The University of Texas at Dallas.
authors.forename: Jonathan D
authors.initials: JD
authors.lastname: Yuen
authors.affiliation: Physics Department, The University of Texas at Dallas.
authors.forename: Joseph W
authors.initials: JW
authors.lastname: Micheli
authors.affiliation: Department of Applied Physics, Aalto University School of Science.
authors.forename: Albert G
authors.initials: AG
authors.lastname: Nasibulin
authors.affiliation: Physics Department, The University of Texas at Dallas; The NanoTech Institute, The University of Texas at Dallas; zakhidov@utdallas.edu.
authors.forename: Anvar
authors.initials: A
authors.lastname: Zakhidov
mesh_terms: D004566:Electrodes; D007477:Ions / Q000737:chemistry; D037742:Nanotubes, Carbon / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry; D012993:Solar Energy; D012996:Solutions / Q000737:chemistry; D017971:Tin Compounds / Q000737:chemistry
chemical_list: D007477:Ions; D037742:Nanotubes, Carbon; D011108:Polymers; D012996:Solutions; D017971:Tin Compounds; C109984:indium tin oxide