title: Near-infrared absorbing boron-dibenzopyrromethenes that serve as light-harvesting sensitizers for polymeric solar cells.
abstract: Hexylthiophene-conjugated boron-dibenzopyrromethenes with benzo[1,3,2]oxazaborinine rings, 1, that absorb near-infrared light with relatively high molecular extinction coefficients have been synthesized. The incorporation of 3-hexylthiophene-conjugated dye 1a at a blend ratio of 5 wt % into a polymeric solar cell based on a P3HT/indene-C(70) bisadduct (IC(70)BA) bulk heterojunction structure improved power conversion efficiency from 3.7 to 4.3%. The present work suggests that well-defined near-infrared absorbing BODIPY analogues can potentially be used as photosensitizers in polymeric solar cells.
authors.affiliation: Department of Applied Chemistry, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University, 1-1 minami-ohsawa, Hachioji, Tokyo 192-0397, Japan. yujik@tmu.ac.jp
authors.forename: Yuji
authors.initials: Y
authors.lastname: Kubo
authors.forename: Kazuki
authors.initials: K
authors.lastname: Watanabe
authors.forename: Ryuhei
authors.initials: R
authors.lastname: Nishiyabu
authors.forename: Rieko
authors.initials: R
authors.lastname: Hata
authors.forename: Akinori
authors.initials: A
authors.lastname: Murakami
authors.forename: Takayuki
authors.initials: T
authors.lastname: Shoda
authors.forename: Hitoshi
authors.initials: H
authors.lastname: Ota
mesh_terms: D001896:Boron Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D011211:Electric Power Supplies; D005456:Fluorescent Dyes / Q000138:chemical synthesis / Q000737:chemistry*; D015394:Molecular Structure; D017319:Photosensitizing Agents / Q000138:chemical synthesis / Q000737:chemistry*; D011108:Polymers / Q000138:chemical synthesis / Q000737:chemistry*; D012993:Solar Energy; D013237:Stereoisomerism
chemical_list: D001896:Boron Compounds; D005456:Fluorescent Dyes; D017319:Photosensitizing Agents; D011108:Polymers