1. Polyethylenimine-Ethoxylated Interfacial Layer for Efficient Electron Collection in SnO2-Based Inverted Organic Solar Cells
- Author
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Ikram Anefnaf, Safae Aazou, Guy Schmerber, Siham Refki, Nicolas Zimmermann, Thomas Heiser, Gérald Ferblantier, Abdelilah Slaoui, Aziz Dinia, Mohammed Abd-Lefdil, and Zouheir Sekkat
- Subjects
inverted organic solar cell ,polyethylenimine-ethoxylated ,P3HT:PCBM ,cathode buffer layer ,SnO2 ,Crystallography ,QD901-999 - Abstract
In this work, we studied inverted organic solar cells based on bulk heterojunction using poly(3-hexylthiophene-2,5-diyl):[6,6]-phenyl-C71-butyric acid methyl ester (P3HT:PCBM) as an active layer and a novel cathode buffer bilayer consisting of tin dioxide (SnO2) combined with polyethylenimine-ethoxylated (PEIE) to overcome the limitations of the single cathode buffer layer. The combination of SnO2 with PEIE is a promising approach that improves the charge carrier collection and reduces the recombination. The efficient device, which is prepared with a cathode buffer bilayer of 20 nm SnO2 combined with 10 nm PEIE, achieved Jsc = 7.86 mA/cm2, Voc = 574 mV and PCE = 2.84%. The obtained results exceed the performances of reference solar cell using only a single cathode layer of either SnO2 or PEIE.
- Published
- 2020
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