Bo Chen^{1 3} Zhengshan Yu² Zachary Holman² Jinsong Huang^{3 1}

1, University of Nebraska–Lincoln, Lincoln, Nebraska, United States
3, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States
2, Arizona State University, Phoenix, Arizona, United States

To exploit the theoretical limit of c-Si and the associated Shockley-Queisser efficiency, one needs a material that can be deposited inexpensively on c-Si and has an efficient bandgap match with c-Si in a tandem cell arrangement to harvest a broader spectrum of the sun’s energy. To match the bandgap of c-Si, a material with bandgap of ~1.6-1.8 eV is needed to produce ~20 mA/cm² under air mass (AM) 1.5 spectrum. These requirements can be met by using the recently developed Organic-Inorganic Halide Perovskite (OIHP) materials. In this talk, I will introduce the challenges and progresses in developing highly efficient and photostable wide bandgap perovskite solar cells with a low temperature solution process, and the integration of them onto silicon cells.