(Peer-Reviewed) Robust performance of PTQ10:DTY6 in halogen-free photovoltaics across deposition techniques and configurations for industrial scale-up
Atiq Ur Rahman ¹ ², Tanner M. Melody ², Sydney Pfleiger ², Acacia Patterson ², Andrea Reale ¹, Brian A. Collins ²
¹ CHOSE & Dept. of Electronic Eng., University of Rome Tor Vergata, Rome 00133, Italy
² Dept. of Physics and Astronomy, Washington State University, Pullman WA99146, US
Opto-Electronic Advances, 2025-12-25
Abstract
With performance improvements, organic photovoltaics (OPVs) are an increasingly competitive technology for renewable energy. However, most high-performance OPVs are small-area devices processed from toxic halogenated solvents via spin-coating, posing a challenge for mass production. We study a low-cost polymer donor (PTQ10) and a non-fullerene acceptor (DTY6) in a halogen-free solvent using industrially relevant blade coating.
The non-inverted architecture performed best, achieving 12% efficiency, with the blade-coating deposition surpassing spin-coating. Active layers processed from the two coating techniques exhibited similar exciton quenching, likely due to the same measured nanodomain size and purity. However, blade-coated devices exhibited a higher charge carrier lifetime correlated with increased acceptor pi-stacking despite decreased donor pi-stacking.
This suggests that optimizing crystallinity in blade-coated devices could result in even higher performance. Additionally, high performance in upscaled blade-coated devices (1 cm²) processed in air with a green solvent demonstrated the industrial potential of this system.
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