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1 August 2021 Polyethylenimine cathode interlayer: influence of solvent on functionality and single-step formation from polymer blend solution
Andreas Opitz, Dominique Lungwitz, Raphael Schlesinger, Sujitkumar Bontapalle, Susy Varughese, Keli Fabiana Seidel, Thomas Krüger, Jan Behrends, Seth R. Marder, Norbert Koch
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Proceedings Volume 11809, Organic, Hybrid, and Perovskite Photovoltaics XXII; 118090Q (2021) https://doi.org/10.1117/12.2593881
Event: SPIE Organic Photonics + Electronics, 2021, San Diego, California, United States
Abstract
Polyethylenimine (PEI) layers are used as cathode interlayer to reduce the work function of electrode materials and are frequently applied to organic or perovskite opto-electronic devices. PEI was applied from solution on poly(3,4-ethylenedioxythiophene):polystyrene sulfonate mixture, zinc oxide and graphite. Choice of solvent and residual solvent removal ensure the superior functionality. [1] Furthermore, a single-step formation of a low work function cathode interlayer and n‑type bulk doping from semiconducting polymer/PEI blend solution was observed. [2] [1] S. Bontapalle et al., Adv. Mater. Interface 7 (2020) 2000291. [2] K. Seidel et al., ACS Appl. Mater. Interfaces 12 (2020) 28801.
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Andreas Opitz, Dominique Lungwitz, Raphael Schlesinger, Sujitkumar Bontapalle, Susy Varughese, Keli Fabiana Seidel, Thomas Krüger, Jan Behrends, Seth R. Marder, and Norbert Koch "Polyethylenimine cathode interlayer: influence of solvent on functionality and single-step formation from polymer blend solution", Proc. SPIE 11809, Organic, Hybrid, and Perovskite Photovoltaics XXII, 118090Q (1 August 2021); https://doi.org/10.1117/12.2593881
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KEYWORDS
Polymers
Electrodes
Interfaces
Optoelectronics
Perovskite
Resistance
Transparency
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