title: Two similar near-infrared (IR) absorbing benzannulated aza-BODIPY dyes as near-IR sensitizers for ternary solar cells.
abstract: Ternary composite inverted organic solar cells based on poly(3-hexylthiophen-2,5-diyl) (P3HT) and phenyl-C61-butyric acid methyl ester (PCBM) blended with two different near-infrared absorbing benzannulated aza-BODIPY dyes, difluoro-bora-bis-(1-phenyl-indoyl)-azamethine (1) or difluoro-bora-bis-(1-(5-methylthiophen)-indoyl)-azamethine (2), were constructed and characterized. The amount of these two aza-BODIPY dyes, within the P3HT and PCBM matrix, was systematically varied, and the characteristics of the respective devices were recorded. Although the addition of both aza-BODIPY dyes enhanced the absorption of the blends, only the addition of 1 improved the overall power conversion efficiency (PCE) in the near-infrared (IR) region. The present work paves the way for the integration of near-infrared absorbing aza-BODIPY derivatives as sensitizers in ternary composite solar cells.
authors.affiliation: Institute of Materials for Electronics and Energy Technology (I-MEET), Friedrich-Alexander-University Erlangen-Nuremberg, Martensstrasse 7, 91058 Erlangen, Germany. Min.Jie@ww.uni-erlangen.de
authors.forename: Jie
authors.initials: J
authors.lastname: Min
authors.forename: Tayebeh
authors.initials: T
authors.lastname: Ameri
authors.forename: Roland
authors.initials: R
authors.lastname: Gresser
authors.forename: Melanie
authors.initials: M
authors.lastname: Lorenz-Rothe
authors.forename: Derya
authors.initials: D
authors.lastname: Baran
authors.forename: Anna
authors.initials: A
authors.lastname: Troeger
authors.forename: Vito
authors.initials: V
authors.lastname: Sgobba
authors.forename: Karl
authors.initials: K
authors.lastname: Leo
authors.forename: Moritz
authors.initials: M
authors.lastname: Riede
authors.forename: Dirk M
authors.initials: DM
authors.lastname: Guldi
authors.forename: Christoph J
authors.initials: CJ
authors.lastname: Brabec