title: High performance polymer tandem solar cell.
abstract: A power conversion efficiency of 9.02% is obtained for a fully solution-processed polymer tandem solar cell, based on the diketopyrrolopyrrole unit polymer as a low bandgap photoactive material in the rear subcell, in conjunction with a new robust interconnecting layer. This interconnecting layer is optically transparent, electrically conductive, and physically strong, thus, the charges can be collected and recombined in the interconnecting layer under illumination, while the charge is generated and extracted under dark conditions. This indicates that careful interface engineering of the charge-carrier transport layer is a useful approach to further improve the performance of polymer tandem solar cells.
authors.affiliation: Universidade Tecnologica Federal do Parana, GPGEI - Av. Sete de Setembro, 3165 - CEP 80230-901 - Curitiba, Parana, Brasil.
authors.forename: Wilson Jose
authors.initials: WJ
authors.lastname: da Silva
authors.affiliation: Universidade Tecnologica Federal do Parana, GPGEI - Av. Sete de Setembro, 3165 - CEP 80230-901 - Curitiba, Parana, Brasil.
authors.forename: Fabio Kurt
authors.initials: FK
authors.lastname: Schneider
authors.affiliation: Department of Information, Display and Advanced Display Research Center, Kyung Hee University, Dongdaemun-ku, Seoul, 130-171 Republic of Korea.
authors.forename: Abd Rashid Bin Mohd
authors.initials: AR
authors.lastname: Yusoff
authors.affiliation: Department of Information, Display and Advanced Display Research Center, Kyung Hee University, Dongdaemun-ku, Seoul, 130-171 Republic of Korea.
authors.forename: Jin
authors.initials: J
authors.lastname: Jang