Sanghyun Paek, Hiroyuki Kanda, Yi Zhang, Hobeom Kim, Yonghui Lee, Kyung Taek Cho, Mousa Abuhelaiqa, Aron Joel Huckaba, Roldan Carmona Cristina, Mohammad Khaja Nazeeruddin

The Group for Molecular Engineering of Functional Materials, Ecole Polytechnique Fédérale de Lausanne, CH-1951 Sion, Switzerland

Perovskite solar cells (PSC) are a new paradigm in renewable energy because of their high efficiency reaching over 24% in less than 10 years.^1,2 The high efficiency of perovskite solar cells is due to their excellent optoelectronic properties, which were optimized by various cations and anions with different ratios. Another advantage of perovskite solar cell is their simple fabrication through solution-processing methods, either in n-i-p or p-i-n configurations.^3,4 The perovskite absorbing layer is consisting of methylammonium lead (II) iodide (MAPbI₃) is intrinsically unstable at elevated temperature due to methylammonium cation release. In this talk, we present 23% efficiency perovskite solar cells with stability using compositional engineered cations and anions, and layer by layer deposition of 3-Dimensional and 2-Dimensional perovskites, and the novel charge transporting materials.⁵

References

1. A. Kojima, K. Teshima, Y. Shirai and T. Miyasaka, J. Am. Chem. Soc., 2009, 131, 6050-6051.
2. NREL Best Research-Cell Efficiencies; https://www.nrel.gov/pv/assets/pdfs/pv-efficiency-chart.20190103.pdf.
3. J. Burschka, N. Pellet, S.-J. Moon, R. Humphry-Baker, P. Gao, M. K. Nazeeruddin and M. Grätzel, Nature, 2013, 499, 316-319.
4. C. Roldán-Carmona, O. Malinkiewicz, A. Soriano, G. Mínguez Espallargas, A. Garcia, P. Reinecke, T. Kroyer, M. I. Dar, M. K. Nazeeruddin and H. J. Bolink, Energy Environ. Sci., 2014, 7, 994-997.
5. K. T. Cho, G. Grancini, Y. Lee, E. Oveisi, J. Ryu, O. Almora, M. Tschumi, P. A. Schouwink, G. Seo, S. Heo, J. Park, J. Jang, S. Paek, G. Garcia-Belmonte and M. K. Nazeeruddin, Energy Environ. Sci., 2018, 11, 952-959.