Proceedings of International Conference Asia-Pacific Hybrid and Organic Photovoltaics 2018 (AP-HOPV18)
Publication date: 27th October 2017
For improving the photovoltaic performance of the perovskite solar cells, one of the key materials is a durable hole-transporting polymers with appropriate HOMO levels, high hole-mobility and high film-formability. Arylamine polymer, poly[bis(4-phenyl)(2,4,-dimethoxylphenyl)amine was synthesized via facile two steps (Hartwig and oxidative coupling reaction) with a high yield. HOMO energy level of the polymer was -5.2 eV, that was appropriate as a hole-transporting layer of perovskite solar cells. The polymer with molecular weight >15,000 dissolved in common organic solvents and formed tough layers with a thickness of 50 nm or less by simple coatings. The perovskite solar cells fabricated with the polymer yielded power conversion efficiency 17.0% (Jsc = 21.4 mA/cm2, Voc = 1.11 V, FF = 0.72) without any additive such as oxidizing dopants. Toward to enlarge the active area of cells, we are tuning coating processes of hole-transporting and perovskite layers.
Acknowledgement
This work was partially supported by NEDO project, Japan
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