title: An efficient triple-junction polymer solar cell having a power conversion efficiency exceeding 11%.
abstract: Tandem solar cells have the potential to improve photon conversion efficiencies (PCEs) beyond the limits of single-junction devices. In this study, a triple-junction tandem design is demonstrated by employing three distinct organic donor materials having bandgap energies ranging from 1.4 to 1.9 eV. Through optical modeling, balanced photon absorption rates are achieved and, thereby, the photo-currents are matched among the three subcells. Accordingly, an efficient triple-junction tandem organic solar cell can exhibit a record-high PCE of 11.5%.
authors.affiliation: Department of Materials Science and Engineering, University of California, Los Angeles, Los Angeles, CA, 90095, USA.
authors.forename: Chun-Chao
authors.initials: CC
authors.lastname: Chen
authors.forename: Wei-Hsuan
authors.initials: WH
authors.lastname: Chang
authors.forename: Ken
authors.initials: K
authors.lastname: Yoshimura
authors.forename: Kenichiro
authors.initials: K
authors.lastname: Ohya
authors.forename: Jingbi
authors.initials: J
authors.lastname: You
authors.forename: Jing
authors.initials: J
authors.lastname: Gao
authors.forename: Zirou
authors.initials: Z
authors.lastname: Hong
authors.forename: Yang
authors.initials: Y
authors.lastname: Yang
keywords: WO3 nanoparticles; inverted tandem structures; polymer solar cells; transfer matrix formalism; triple junctions