Two similar near-infrared (IR) absorbing benzannulated aza-BODIPY dyes as near-IR sensitizers for ternary solar cells.

Journal article

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: Min, J; Ameri, T; Gresser, R; Lorenz-Rothe, M; Baran, D

• Publication status: Published
• Peer review status: Peer reviewed
• Publisher: American Chemical Society
• Journal: ACS applied materials and interfaces
• Volume: 5
• Issue: 12
• Pages: 5609-5616
• Publication date: 2013-06-01
• DOI: 10.1021/am400923b
• EISSN: 1944-8252
• ISSN: 1944-8244
• Language: English
• Keywords: inverted organic solar cells; aza-BODIPY dye; ternary composite solar cells; sensitizer; near-IR absorbing; power conversion efficiency