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.