1. Two similar near-infrared (IR) absorbing benzannulated aza-BODIPY dyes as near-IR sensitizers for ternary solar cells
- Author
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Melanie Lorenz-Rothe, Jie Min, Moritz Riede, Derya Baran, Karl Leo, Vito Sgobba, Roland Gresser, Dirk M. Guldi, Christoph J. Brabec, Anna Troeger, and Tayebeh Ameri
- Subjects
Matrix (chemical analysis) ,Materials science ,Organic solar cell ,Near-infrared spectroscopy ,Composite number ,Energy conversion efficiency ,Aza-bodipy ,General Materials Science ,Photochemistry ,Absorption (electromagnetic radiation) ,Ternary operation - 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.
- Published
- 2016
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