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Potassium-chemical synthesis of 3D graphene from CO₂ and its excellent performance in HTM-free perovskite solar cells
- Wei, Wei, Hu, Baoyun, Jin, Fangming, Jing, Zhenzi, Li, Yuexiang, García Blanco, Andres Alberto, Stacchiola, Dario J., Hu, Yun Hang
- Journal of materials chemistry A 2017 v.5 no.17 pp. 7749-7752
- carbon dioxide, chemistry, electric power, electrodes, graphene, greenhouse gases, potassium, solar cells, solar energy, solar radiation
- The conversion of greenhouse gas CO₂ into novel materials is the most promising approach to solve greenhouse gas issues. Herein, we report for the first time the reaction of potassium with CO₂ to synthesize three-dimensional honeycomb-like structured graphene (3DHG). Furthermore, 3DHG exhibited excellent performance as a counter electrode for hole transport material (HTM)-free perovskite solar cells, leading to a power conversion efficiency of 10.06%. This work constitutes a new aspect of potassium chemistry for material synthesis from a greenhouse gas and the generation of electrical energy from sunlight.